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Andreas Spiess

Andreas Spiess

6 років тому

Knowing how your antennas work or build and optimize our antenna is very rewarding. Unfortunately, it needs know-how and some costly equipment to do that. Today we will change that, and I show you an affordable new tool that enables these tasks. This small device was one of my best investments I made so far.
My HAM Radio channel: / @hb9bla
At the end
- You know how to build and optimize a LoRa ground plane antenna
- You will know How to tune a commercially available antenna
- You will get a little theory behind it, as usual
And we will have a close look at this small gadget from China and compare it with a professional tester
Links:
N1201A Antenna Tester: s.click.aliexpress.com/e/Nhr3Xedw
Calibration Set: s.click.aliexpress.com/e/q3VbiQ7 or s.click.aliexpress.com/e/VJeqJY7 (not tested)
N2201SS (2 ports): s.click.aliexpress.com/e/CHDgGnr2
Ground Plane calculator: www.buxcomm.com/ground_plane_c...
SMA connector for Antenna: s.click.aliexpress.com/e/RBAYzbU
What's inside the N1201SA: notes.superlogical.ch/?p=89
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
My Patreon Page: / andreasspiess
If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission (of your purchases the next 24 hours) to buy new stuff for the channel
For Banggood bit.ly/2jAQEf4
For AliExpress: bit.ly/2B0yTLL
For ebay.com: ebay.to/2DuYXBp
profile.php?...
/ spiessa
www.instructables.com/member/...
Please do not try to Email me or invite me on LinkedIn. These communication channels are reserved for my primary job
Equipment in my lab: www.sensorsiot.org/my-lab/

КОМЕНТАРІ: 738
@romiolover6852
@romiolover6852 6 років тому
i am an electronic engineer for around 20 years and I can tell that this tutorial is one of the best tutorials I had seen
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you for your nice words!
@BobDarlington
@BobDarlington 3 роки тому
Maybe that's the difference. I do this stuff for a living. Lots of errors in the first 5 minutes.
@1001011100101001
@1001011100101001 2 роки тому
@@BobDarlington Perhaps we could all learn something if you share what you believe these errors are? Otherwise your comment is not only useless, but annoying.
@martym2464
@martym2464 2 роки тому
Very true.... and that's when someone is super knowledgeable and super funny and knows how to combine them :)
@pequeajim
@pequeajim Рік тому
@@martym2464 agreed!
@brunobraga767
@brunobraga767 6 років тому
This man is the best eletronics and DYI UKpostsr, not only he explains why things work like they do but also tells the truth and shows what he means. Thank you Andreas for making these videos and helping thousands making little projects that seemed impossible before!
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you for your nice words!
@pliniobass
@pliniobass 3 роки тому
I watched this video in the past and now I went back to watch it again to ask questions. I'm just frustrated that I can't press the "Like" button again. Thank you again master.
@AndreasSpiess
@AndreasSpiess 3 роки тому
Thank you. Did you watch my newest ones about the topic?
@Starfishtroopers
@Starfishtroopers 6 років тому
Now when I am working with electronics I have a Swiss voice in my head.. Dankeschön
@AndreasSpiess
@AndreasSpiess 6 років тому
Bitteschön!
@FindLiberty
@FindLiberty 6 років тому
The expensive equipment had unlocked the, "black art of RF" to me decades ago. (It's easy with the right tools.) THANK YOU for your _perfectly_ concise explanation of the theory, and FOR SHOWING THESE _DELIGHTFULLY AFFORDABLE_ DIY TOOLS!
@AndreasSpiess
@AndreasSpiess 6 років тому
You might be aware that I was (sightly) delighted too when I made this video...
@stevemacbr
@stevemacbr 3 роки тому
AGREED - #MeToo LOL >>> I relied on the maths and precision construction,... but was BLIND to the real / actual tuning. .
@SteveWrightNZ
@SteveWrightNZ 5 років тому
This unit is excellent. This one of the most addictive radio tools I have every owned - just cannot stop making antennas!!
@deangreenhough3479
@deangreenhough3479 6 років тому
Ok, Ok....... so once again you introduce me to another topic (I thought I had no interest in). Once again your enthusiasm for the subject, along with the way you present, is just a dream. At the speed you are going, I have to wonder what wonders you have for us in the future. My life is enriched every Sunday by your work and often I spend the week thinking it over. I’m surprised you hardly mentioned how much you loved your new tool 🤥 Keep going Andreas, you are an authority on so many subjects.
@AndreasSpiess
@AndreasSpiess 6 років тому
I had 61 years to learn. So, some things are buried somewhere in my brains. Like antenna theory. I had to build my own antennas when I was a radio operator in the war zone of N'Djamena already in the 1980s ;-)
@StephaneHollande
@StephaneHollande 5 років тому
Thank you Andreas, as a French, I like your Swiss accent, and I remain admirative in front of the simplicity with which you can explain complex subjects ...I'll keep watching your multiple videos and keep learning ... Your experiments basically save me the hassle of trial and errors, and help me to go straight to the right solution. Bravo !
@AndreasSpiess
@AndreasSpiess 5 років тому
Thank you for your nice words!
@chrisgreece52
@chrisgreece52 6 років тому
I have learned more things from your videos on practical and theoretical electronics than in my 4 years in the EE school.
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you!
@waltsteinchen
@waltsteinchen 6 років тому
I *really* like how show some theorie , but always tied to practical usage! Had to order that device .. no chance to resist ;)
@FindLiberty
@FindLiberty 6 років тому
Yes; resistance is futile. Now order yours right away, if you have enough capacitance.
@AndreasSpiess
@AndreasSpiess 6 років тому
+ Water: I am sure you will enjoy it.+ FindLiberty: I like your comment!
@murrayzhong3968
@murrayzhong3968 2 роки тому
I have no experience and knowledge about antenna. But I am learning a lot from your tutorial. Thank you so much.
@AndreasSpiess
@AndreasSpiess 2 роки тому
Glad to hear that!
@JasonCarlson
@JasonCarlson 6 років тому
Again Andreas has surpassed all the others!! You earned my patronage!!! Keep up the good work!!
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you for your support!
@sethalump
@sethalump 6 років тому
As a life long antenna building nerd, I really appreciated this video. I've had my eye on one of these inexpensive VNAs for some time. Now I'll be sure to get one.
@AndreasSpiess
@AndreasSpiess 6 років тому
I am sure you will enjoy it.
@JohnBaxendale
@JohnBaxendale 3 роки тому
Andreas, you are a legend. I learnt more in the first 5 minutes of this video than I had in months of playing around with DIY antennas :)
@AndreasSpiess
@AndreasSpiess 3 роки тому
Antennas are not easy and the knowledge is not widely spread. So I am glad the video was helpful.
@billseward2274
@billseward2274 4 роки тому
I learned more about antennas in this 16 minute video than I did from by Extra Class license course. Thanks!
@AndreasSpiess
@AndreasSpiess 4 роки тому
Not good. They should learn you how it works before you buy a 1kW amplifier ;-)
@billseward2274
@billseward2274 4 роки тому
They do, or at least they try. But it's presented as if you're an electrical engineering student. That's doesn't work with everyone. Definitely didn't with me, and I spent a career in technology.
@0miker0
@0miker0 6 років тому
One of the best videos of 2018. Thank you for explaining things I’ve always wondered about my whole career.
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you for your nice words!
@clarkturner9413
@clarkturner9413 3 роки тому
This is good work, Andreas. You explain things very clearly so that I can understand things that I have not understood for many years. Thank you so much.
@AndreasSpiess
@AndreasSpiess 3 роки тому
You are welcome! Glad my videos help.
@mikehudson3620
@mikehudson3620 6 років тому
That does it !!! It's 40 years since I used a Smith chart. 15 years working with HF/VHF/UHF antennas with the old tools. What would we have given for tools like that? Yes, I see why you fell in love with it! I'm off to your Patreon channel - give us more like this.
@AndreasSpiess
@AndreasSpiess 6 років тому
This is the reason I like this part a lot...
@northshorepx
@northshorepx 6 років тому
OH WOW, THANK YOU! !!!. This is one of your best videos to date. Antennae theory and practice is something that most of electronics hobbyists have to always rely on others, such as vendors and manufacturers, when we build with RF modules such as Lora etc. Using this video the theory and practice is now approachable. - IN A COLOUR GRAPH!!!! You have really showed us how we can optimise our own antennae using tools that even we hobbyists can consider getting. Thank you again! One question please Andreas, please could tell us if this device can be used for wifi/ES32/ESP82xx, GSM and other similar modules that all play with. I know you said that the 2.2 GHz band is covered, but is it just as effective in that range? Sorry if I missed this the video but it wasn't clear to me. Ps. The other thing that wasn't clear was whether you loved this new tool? :-)
@AndreasSpiess
@AndreasSpiess 6 років тому
Concerning 2.4 GHz: We did not focus on that range so I cannot tell you if the results are as good as they were below 1 GHz. But I assume they are ok, too. I saw a video somewhere where the guy used it for WiFi antenna testing.
@helnatinty7631
@helnatinty7631 5 років тому
northshorepx p
@tirexutus
@tirexutus 5 років тому
@@AndreasSpiess Hello Andreas, Do you have experience with the management of Rigexpert? I have the AA-600, but it remains at 600mhz maximum. I was looking at several models, which at least could analyze the 2.4-2.5Ghz band, for wifi antennas, and have appeared yours N1201A, the Vna Tiny and another one that is much more expensive, the KC901V, which comes to cover the wifi antennas of double band. I would like to know if the measurements of the N1201A are quite accurate, since I would like to use it to make high sensitivity Bluetooth antennas. Thanks for your mythical tutorials. I wait your answer. Best regards from Barcelona, Catalonia.
@ristomatti
@ristomatti 6 років тому
Super useful information presented in a clear, concise and convincing manner. Thank you once again! Anxiously waiting for the next video...
@ristomatti
@ristomatti 6 років тому
Order for the tester placed. My guess is that Shenzhen Boss Digital Electronic Co is going to be very happy for this video also. :) Tip for people not using the AliExpress app - very often products are discounted for mobile orders. In this case 6% discount. I've been wondering why this is with a tin foil hat in my head.
@AndreasSpiess
@AndreasSpiess 6 років тому
This was the last antenna video on this channel for a moment. Other topics are waiting...
@ColeDedhand
@ColeDedhand Рік тому
I have been using a nanovna for a couple of years and have found it very useful for tuning and troubleshooting antennas. Every time I use it I am amazed that such a cheap tool can give me the same information as the $80,000 analyzer I use at work. Obviously I don't expect it to be perfect but I have compared it and found it surprisingly close.
@AndreasSpiess
@AndreasSpiess Рік тому
I agree. When the first cheap devices appeared on the market, I had suspicions and also compared it with an expensive instrument. Already then, the results were usable for my purposes.
@Aemilindore
@Aemilindore 6 років тому
Thank you for getting into antenna theory. Because your explanations are so easy to understand, I think I will be able to learn basics of antennae theory from this series
@AndreasSpiess
@AndreasSpiess 6 років тому
You are welcome!
@rodericksibelius8472
@rodericksibelius8472 2 роки тому
I was a Microwave Technician and took a 9 month Special class about antennas, learned all the basics, theory and use of the Smith Chart and went on to work to help build 4-18 Ghz microwave amplifiers here in Silicon Valley, there were a lot of tuning using the microcope, tuning is like black magic with a skill using those little gold chips and soldering / tacking them when the desired SWR was achieved. I would like to buy one of these... hahaha... I'd like to learn how to use this HIGH TECH DEVICE 'AWESOME'...
@AndreasSpiess
@AndreasSpiess 2 роки тому
Maybe you watch my video about the NanoVNA. This is a more modern version (which also shows the Smith chart)
@noweare1
@noweare1 6 років тому
Its a great time to be alive if you are in the electronics/technical/software fields
@AndreasSpiess
@AndreasSpiess 6 років тому
You are absolutely right. I enjoy it every day!
@skewedmaker
@skewedmaker 6 років тому
Your videos are always interesting and I always learn something useful.
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you!
@gertux
@gertux 6 років тому
It seems you really like your new tool ;-) Thanks for the content, very interesting, as usual.
@AndreasSpiess
@AndreasSpiess 6 років тому
Yes, it is very useful for me.
@LeonBotha63
@LeonBotha63 2 роки тому
I really enjoyed this as well as quite a few other videos you have produced, thank you.
@AndreasSpiess
@AndreasSpiess 2 роки тому
Glad you enjoyed it!
@MoTown44240
@MoTown44240 5 років тому
I typically transmit signals from 300 mW to 3 W when trying to communicate with my Amateur Radio. Prior to recent times the technology that you describe was not available to most hobbyists. Glad that technology is making measuring devices like this that I can afford on my retirement pension. I enjoy building my antennas, mostly for HF.
@AndreasSpiess
@AndreasSpiess 5 років тому
Things changed considerably since we were young. And now I feel like living in a "electronics paradise"
@sethalump
@sethalump 6 років тому
LOL! I remember in trade school asking the head of the electronics department about antenna matching. "Complex impedance.... That is a dark art of the field" Nice to see it described as such from you.
@AndreasSpiess
@AndreasSpiess 6 років тому
:-)
@GulfSouthGene
@GulfSouthGene 5 років тому
Thanks, really enjoyed video, well done! I am 76 and a retired electrical engineer / technician. Never too-old to lean new technology!
@AndreasSpiess
@AndreasSpiess 5 років тому
You are right! I have a few viewers at your age. So our profession seems to be healthy for the brains ;-)
@vu2kgb
@vu2kgb 3 роки тому
Great video and simple description. I have a PS 100 model of it and I find it very useful for tuning the POTY antenna for QO-100
@AndreasSpiess
@AndreasSpiess 3 роки тому
Did you see my videos about the QO-100?
@soulrobotics
@soulrobotics 3 роки тому
Andreas, the length of the coax is also important. Perhaps you can make a video on how, some time is better to put the amplifier also with the antenna on the roof.. .. And measure the comparison on power reflected.
@logicm6365
@logicm6365 Рік тому
Well explained.. Always your style of presentation is easy to understand and very useful for beginners..
@AndreasSpiess
@AndreasSpiess Рік тому
Thank you for your kind words!
@joelo_benitez
@joelo_benitez 2 роки тому
Eres lo mejor que le ha pasado a la Ingeniería Electrónica!!!
@AndreasSpiess
@AndreasSpiess 2 роки тому
Thank you. Maybe you watch also my video about the NanoVNA...
@stevemacbr
@stevemacbr 3 роки тому
Such a good tutorial,... I bought one for analysing my home-brew antennas I make for mobile coverage & repeaters. . .
@AndreasSpiess
@AndreasSpiess 3 роки тому
You are not alone,. These cheap VNAs became quite popular. And very handy!
@stevemacbr
@stevemacbr 2 роки тому
@@AndreasSpiess - Good day, and apologies for not responding to your kind reply above. - Did you ever measure the FINAL cut length of your TUNED antenna ??? >82mm or
@v-king936
@v-king936 6 років тому
Thanks Andreas, as usual, your videos are excellent and will save us lots of RF-hassle!
@AndreasSpiess
@AndreasSpiess 6 років тому
You are welcome!
@KunalGautam
@KunalGautam 6 років тому
Like previous video on antenna, this video is really useful. I'd like to thank you Andreas for sharing useful videos.
@AndreasSpiess
@AndreasSpiess 6 років тому
You are welcome!
@edwatters6377
@edwatters6377 6 років тому
I also purchased the N1201SA so I can fine tune my 915 MHz LoRa antennas. Your video is great. KC2ORP
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you!
@TheGg6422
@TheGg6422 6 років тому
You make very nice videos, for me some parts are review but some is new, kind of to radio stuff but have done electronics for years. Thanks again for sharing!
@AndreasSpiess
@AndreasSpiess 6 років тому
You are welcome!
@gte24v
@gte24v 6 років тому
Great video again, I will have to have one of those analysers, I was brought up on an HP VNA and have seen that the price of professional equipment has tumbled down in recent years. Remember the Anritsu Sitemaster? So helpful to have the comparison with a 'known good' analyser - better than any sales pitch. Now, what would be interesting (because you like testing outdoors and now have the tools) it would be really interesting to show the impact of antenna optimisation on your radio link budget in real terms of RSSI. Again, great video, keep it up. (Ian T) :-)
@AndreasSpiess
@AndreasSpiess 6 років тому
This was the last antenna video for a while on this channel. Many other topics are waiting...
@darrylday30
@darrylday30 2 роки тому
Excellent! I love the lesson plan and summary. It helps reinforce learning.
@AndreasSpiess
@AndreasSpiess 2 роки тому
Great to hear! Thank you.
@ReflectingMe2024
@ReflectingMe2024 6 років тому
So Andreas, I was wondering, do you like the N1201SA Vector Network Analyser. Couldn't quite tell... 😜 Excellent video, sir.
@AndreasSpiess
@AndreasSpiess 6 років тому
I wanted to leave everybody uncertain about that fact. Glad I succeeded ;-)
@Conservator.
@Conservator. 6 років тому
John Burns Exactly my thoughts! 😂
@TonyLehto
@TonyLehto 6 років тому
You best video so far! That explained a lot! Good work! Now the logical next step is to explain impedance even deeper.
@AndreasSpiess
@AndreasSpiess 6 років тому
This was the last video on antennas for a while. There are better channels for that if you are interested in antennas. I want to keep this channel broad, and not trivial, but not only for specialists.
@acestudioscouk-Ace-G0ACE
@acestudioscouk-Ace-G0ACE 2 роки тому
Really excellent teaching here, learning points well made and useful information. Thank-you.
@AndreasSpiess
@AndreasSpiess 2 роки тому
You are welcome!
@HelmutTschemernjak
@HelmutTschemernjak 6 років тому
Super great video, I love this N1201SA device. BTW: The open/closed SMA connectors are easy to build for everyone. For the 50 Ohm load, a 100 Ohm 0.1% (two parallel ERA-6AEB101V Panasonic) resistors will do the job.
@AndreasSpiess
@AndreasSpiess 6 років тому
So you were more successful than me. We did some tests with a "homemade and a "bought" open and short. The differences were noticeable already at 868.
@tornadokat
@tornadokat 5 років тому
Something else I didn't know I needed until now LOL This would have been awesome 30 years ago when I was doing VHF/UHF radio work.
@AndreasSpiess
@AndreasSpiess 5 років тому
You are right. We live in a wonderful world (electronically)
@opk157
@opk157 6 років тому
I can only confirm: I own one and I love it - so much better than calculations ;)
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you for your feedback. It is very valuable for others
@Giblet535
@Giblet535 6 років тому
Excellent video! It's worth adding that altering an RF transmitter's performance in any way can easily put you on the wrong side of the law in one's home country, and that doing so is obviously (and entirely) at their own risk.
@AndreasSpiess
@AndreasSpiess 6 років тому
Thanks for your info. I hope, my viewers know what they do...
@Cqdx11
@Cqdx11 2 роки тому
Informative and entertaining! Just ordered a NanoVNA -H 4" for optimising my RX antenna's that have to be stealth! (Wife, LOL)
@AndreasSpiess
@AndreasSpiess 2 роки тому
You will love it. Make sure you watch my NanoVNA video before you start ;-)
@parrotgenie5099
@parrotgenie5099 4 роки тому
Being a engineer this is a great video, love that tool as well for something simple and portable when I don't want to drag out the analyzer and extension cord.
@AndreasSpiess
@AndreasSpiess 4 роки тому
Many of my viewers bought one and I got quite good feedback about it.
@bardenegri21
@bardenegri21 6 років тому
Very nice, I've had this thing in my wishlist for about a year now. Guess it's time :)
@AndreasSpiess
@AndreasSpiess 6 років тому
Enjoy!
@guitarpicker7464
@guitarpicker7464 6 років тому
Great video .. You should have included how to measure the antenna impedance using the NS1201SA. You can tune the radials by bending them at an angle and measuring the change in impedance at the specific frequency. You can also use the VNA to cut optimum length feed lines. Did I mention I love this tool too :-)
@AndreasSpiess
@AndreasSpiess 6 років тому
You are right. But the video should not get too long and I always leave something to discover by ma viewers.
@PhilipHubbe
@PhilipHubbe Рік тому
Great to the point tutorial for people who know nothing about smith charts
@AndreasSpiess
@AndreasSpiess Рік тому
Thank you!
@denteeremelo7212
@denteeremelo7212 4 роки тому
really amazing tutorial, congratulations and thank you very much!
@AndreasSpiess
@AndreasSpiess 4 роки тому
Thank you for your nice words!
@alexanderbecker8924
@alexanderbecker8924 6 років тому
Einfach super! Ich habe schon lange darauf gewartet.Vielen Dank!
@AndreasSpiess
@AndreasSpiess 6 років тому
Bitte, gern geschehen
@Harani66
@Harani66 6 років тому
brilliant. We just got one of these for our Maker Space!
@AndreasSpiess
@AndreasSpiess 6 років тому
Good!
@martinsauerteig4882
@martinsauerteig4882 6 років тому
Again a very good video! Thank you very much. I ordered a N1201SA this morning via your link and hope, you'll get your "fee".
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you for your support! I hope you will like it.
@pequeajim
@pequeajim Рік тому
Thank you for this. Great presentation!
@AndreasSpiess
@AndreasSpiess Рік тому
Glad it was helpful!
@thelement3363
@thelement3363 2 роки тому
Excellent presentation. Thank you!
@AndreasSpiess
@AndreasSpiess 2 роки тому
Glad you enjoyed it!
@folkertbleichrodt5622
@folkertbleichrodt5622 5 років тому
Andreas, thanks for the great video. I think it would be a nice idea to set up a website where the performance, or resonating frequency of these antennas is documented. These VNA tools are still quite expensive for the regular maker, also because you usually have to pay custom fees for more expensive items. Maybe a simple public Google sheets will work for this, or a Google sites website?
@AndreasSpiess
@AndreasSpiess 5 років тому
You never know if our dealers change their suppliers. I can only test what I have on my bench.
@jobliss3932
@jobliss3932 2 роки тому
Sometimes there are maker spaces that have all the fancy equipment. Maybe build your antenna and take it there! :) Then everyone shares all the equipment. I hear some places even have the thing that goes bleep! ;)
@LawpickingLocksmith
@LawpickingLocksmith 4 роки тому
Today I got my Nano Vna and Joe Smith mentions you in his video!
@AndreasSpiess
@AndreasSpiess 4 роки тому
VNAs are great! Enjoy.
@willofirony
@willofirony 6 років тому
An awesome video, Andreas. You have demystified the dark arts of antenna tuning. Northshorepx says it all and I support all he says.
@AndreasSpiess
@AndreasSpiess 6 років тому
Thank you!
@torstenwagner1185
@torstenwagner1185 5 років тому
Hi, thanks for the video, which introduced the N1201sa to me. I looked for further information and was astonished to learn there are not many information at all, beside of a few UKposts Videos. E.g. There are many different models now. N1201sa the one you introduced N1201sa+ with an extended frequency range down to 37MHz N1201sac which adds a ttl serial port for communication. Then there seems to be a successor N2201SS, which seem to add a TX port, but Infos on that is very spare and most is misleading, e.g. the description of the N1201sa is given albeit the N2201SS is for sale. No infos whether different versions of the N2201 exists. Finally some sellers offer a N2061SA which also seems to offer a TX port for a frequency range from 1.1 MHz to 1.3 GHz. Albeit no more infos can be found. Esp. Further spec differences between the N2201 and the N2061 would be interesting. All Infos so fare are from Chinese sellers on the usual platforms. We all know how much we can trust those information... Heck, I couldn't even find the original manufacture homepage. No comparison tables, no reviews for the later two models. Nothing... even in Chinese information on the internet are rather spare. Much interesting would be a miniVNA tiny vs a N2201SS comparison, to get an idea about the performance in this price range. Both follow different ideas about usability etc. but at the end those might be what a hobbyist is looking for. Maybe that is a good idea for a part two of this video. ;)
@AndreasSpiess
@AndreasSpiess 5 років тому
I cannot Test VNAs. The only I tested with a colleague is the one I showed. The mini seems to be ok and the software works. For the moment I do not plan an additional video. I use the small one for my antenna tuning and the miniVna if I want to learn about Smith chart.
@torstenwagner1185
@torstenwagner1185 5 років тому
Well, I understand this. Was hoping that others can provide more information about all those different models. Identifying the original manufacturer would be a good start already. If you would have to decide for one, the N1201sa or the minivna tiny, which would you give a preference?
@M6MDR
@M6MDR 6 років тому
Hi and thank you for yet another interesting video. Regarding the antenna you were showing that shifted resonant frequency when you removed / replaced the cover. I am wondering if it had something to do with the carbon content of the plastic / rubber used to make the antenna cover? A long time ago, I read about building antennas and it said not to use black plastics to house antennas due to the carbon used in black plastics.
@AndreasSpiess
@AndreasSpiess 6 років тому
Well possible. I do not know the (chemical) reason. If it can be adjusted by cutting the wire it is still ok...
@TMS5100
@TMS5100 6 років тому
Nice timing. I ordered one a few days ago already 😁
@AndreasSpiess
@AndreasSpiess 6 років тому
Enjoy!
@TMS5100
@TMS5100 5 років тому
i compared it with some expensive analyzers. it seems quite accurate. really interesting for such a price.
@robinkumar9086
@robinkumar9086 3 роки тому
Thank you sir for such an informative video
@AndreasSpiess
@AndreasSpiess 3 роки тому
You are welcome! Maybe you check my newer videos about the topic?
@JakeHarris0
@JakeHarris0 4 роки тому
"like a good politician, if a method does not work, we just use more of it" HAHAHAHA!!!!!
@jamesgoacher1606
@jamesgoacher1606 3 роки тому
It is a little like an Englishman trying to speak Swiss. English Loudly, then more Loudly.
@flexairz
@flexairz 3 роки тому
Spot on, we see that every day now.
@youpattube1
@youpattube1 5 років тому
Andreas - Excellent informative video. But maybe i misunderstood one point. You said "these VNA's must br calibrated using these three items", but i can't figure out if you mean if you buy the n1201a you will have to calibrate it, or if you mean if you want to calibrate it.
@AndreasSpiess
@AndreasSpiess 5 років тому
You should calibrate it from time to time.
@dimkars
@dimkars 6 років тому
Thank you! So much useful info in such a simple way!
@AndreasSpiess
@AndreasSpiess 6 років тому
You are welcome!
@MaxWattage
@MaxWattage 5 років тому
Hi, as you already have a Siglent spectrum analyser, couldn't you have used that to tune your antennas, by means of a Directional Coupler? I ask because I need to learn how to tune an antenna for my next project (and I happen to own a Siglent SSA3032X spectrum analyser, with the TG license).
@AndreasSpiess
@AndreasSpiess 5 років тому
I have the Siglent directional coupler, but did not get good results. This small bugger is much better for this purpose (maybe because it also looks at phase). And more handy, too.
@shadetreehandyman
@shadetreehandyman 6 років тому
Great work... I'll be checking out your other videos for sure.
@AndreasSpiess
@AndreasSpiess 6 років тому
Welcome on the channel!
@marklowe7431
@marklowe7431 3 роки тому
Brilliant video. Thank you Andreas.
@AndreasSpiess
@AndreasSpiess 3 роки тому
Glad you enjoyed it!
@eddyfontaineyoutu100
@eddyfontaineyoutu100 6 років тому
Thank you Andreas ! 👍👍 RF has always been "black magic" to me ...☹️ I wich i had your knowledge about antennas !
@AndreasSpiess
@AndreasSpiess 6 років тому
You are welcome!
@calebjames9978
@calebjames9978 3 роки тому
Hey, Andreas! Love this video and I'm thinking of purchasing the analyzer you have in your video. For your ground plane antenna, I can solder the copper wire no problem and I have the link to your SMA connector but I don't know how to install the SMA calibration set that you've linked. Would you able to walk me through the order in which you would place those on the analyzer? Thanks in advance! :)
@AndreasSpiess
@AndreasSpiess 3 роки тому
Maybe you watch my video about how to use a VNA...
@Stingmni
@Stingmni 2 роки тому
Great teacher. Thanks much!
@AndreasSpiess
@AndreasSpiess 2 роки тому
You are welcome! Maybe you also watch my newer video on the nanoVNA? (if not already done).
@petervanderburg5543
@petervanderburg5543 6 років тому
Thanks Andreas. Out of interest, after you manually "tuned " the radiating element by physically cutting it, how does the length compare with the wavelength calculation of freq(MHz)/300? And how close was the length of the radiator to what the online calculator indicated?
@AndreasSpiess
@AndreasSpiess 6 років тому
I did not measure.
@johnwhitmore2531
@johnwhitmore2531 6 років тому
Thank you, very useful info on Antennas. I'd love to learn what are the things to be considered if you soldered a LoRa module to a PCB. So then routing a track from LoRa module to the antenna. I'd imagine you could make quite a mess.
@AndreasSpiess
@AndreasSpiess 6 років тому
Keep the distance between the module and the antenna short... Maybe you google about the dimensioning of transfer lines on PCBs.
@charlesemehel2449
@charlesemehel2449 3 роки тому
Thanks a lot Professor Spiess! :))
@AndreasSpiess
@AndreasSpiess 3 роки тому
You are welcome!
@NicksStuff
@NicksStuff 2 місяці тому
The marker is the yellow triangle, right? And the resonant frequency is the minimum of the curve? I'm happy because you say it's perfectly at 868 when there's quite a gap between the two
@AndreasSpiess
@AndreasSpiess 2 місяці тому
Maybe something went wrong during the filming. Yes, the minimum is what we are looking for.
@R2DMD
@R2DMD 3 роки тому
Thanks for good video! You adjusted length of a portable antenna while it was connected to the VNA. Does case of the VNA affect antenna properties? I mean once you disconnect that antenna from the VNA and connect that antenna to a radio, it might not match exactly the same. If radio case is bigger or smaller than VNA case or if it is made of different materials the antenna will match differently to the radio.
@AndreasSpiess
@AndreasSpiess 3 роки тому
Every change changes the properties. So you can try to emulate the situation as good as possible. You see this also if you touch the SMA connector while you measure with the VNA
@R2DMD
@R2DMD 3 роки тому
@@AndreasSpiess Got it. Thanks for explaining.
@KeithPhillipsSkyWriter
@KeithPhillipsSkyWriter 3 роки тому
Enjoyed your video. Very informative and entertaining. Thanks!
@AndreasSpiess
@AndreasSpiess 3 роки тому
Glad you enjoyed it!
@ariarokoski6449
@ariarokoski6449 5 років тому
After watching this video I ordered the N1202SA. And Sir, You were right, it is a great tool! I have tried to find an adapter that could be used to measure the IPX connector small antennas. Can You give some tips where to find adapter that makes it possible to test antennas having u.fl and IPX female connector? You are doing excellent job helping people to get in to electronics. Oh, and did I already mention that I love Your videos ;-)
@AndreasSpiess
@AndreasSpiess 5 років тому
You find them on Aliexpress (IPX SMA adapter). I ordered 2 different and one was not good. But I do no more know which one was which :-(
@bobcongleton9220
@bobcongleton9220 2 роки тому
Very educational, and well done, Fine presentation...Thank you...
@AndreasSpiess
@AndreasSpiess 2 роки тому
:-) Did you see my other videos about this topic?
@andythrasher9288
@andythrasher9288 2 роки тому
Andreas your VNA and related videos are great and much appreciated is that you don't weight them down with complicated math and equations. However one thing troubles me. If an analyzer needs calibrated each time frequency is changed which I understand, what happens when I use adapters to analyze different antennas in the HF ham bands that use say for instance type N and PL259? Would not the use of adapters skew the calibration result especially if said adapters are of low quality? What say you my friend? 73 de N8EVM
@AndreasSpiess
@AndreasSpiess 2 роки тому
Maybe you watch my video about the proper usage of the nanoVNA. There I explain the influence of the reference plane. Because we usually only have one calibration set we have to live with this inaccuracy. You find the nanoVNA on my new HAMradio channel: ukposts.info/have/v-deo/l5eLeZumeKJmr58.html
@angelg3986
@angelg3986 3 роки тому
And as conclusion I miss a clear statement - did it measure close to the professional equipment or not ?
@hoggif
@hoggif 4 роки тому
I find the N1201SA analyzer very usefull. I have one. I would recommend it too. I would prefer a good spectrum analyzer with larger bandwidth but I cannot justify the cost.
@AndreasSpiess
@AndreasSpiess 4 роки тому
These devices are still quite expensive. I only bought one because it was a long-time dream...
@MubinIcyer
@MubinIcyer 5 років тому
Yes, you mentioned already that you loved it :)
@AndreasSpiess
@AndreasSpiess 5 років тому
:-)
@saxpert
@saxpert 4 роки тому
Grüezi, ich habe mir ein nanovna gekauft, ebenfalls ein wunderbares und viel günstigeres Tools mit Touchscreen, welches auch gleich die Kalibrierungstools mitbringt und anscheinend opensource Firmware besitzt. Eine hf-Frage: da dieses Gerät von 50khz bis 900mhz funktioniert...wäre es prinzipiell möglich eine Antenne auf 1090mhz abzustimmen, indem ich diese auf 545mhz anpasse und habe damit auch bei 1090mhz das gleiche Stehwellenverhältnis? Oder ist das ein Denkfehler? Danke im Voraus und VG
@AndreasSpiess
@AndreasSpiess 4 роки тому
Wenn das so möglich wäre könnte man ja auch noch höhere Frequenzen mit dem gleichen Prinzip messen. Der NanoVNA ist ein sehr nützliches Gerät (ich hab auch eines hier). Aber nur bis max 900MHz (bis 300 MHz ist er genauer).
@schmelpe
@schmelpe 4 роки тому
Hi Andreas, Isn't it necessary to measure the antenna including the cable? Afaik from my old CB Radio Times it's necessary to reach the minimum VSWR.
@AndreasSpiess
@AndreasSpiess 4 роки тому
You have to decide what you want. If you are interested including the cable, then you measure including the cable. I was only interested in the antenna because often no cable is used or everybody uses a different cable. And the cable should be 50 ohms and not change the whole thing too much.
@schmelpe
@schmelpe 4 роки тому
Hi Andreas, thanks for clarification. Keep forward.
@ahmedjoo1858
@ahmedjoo1858 4 роки тому
Thanks Andreas, awesome video as always. quick question .. can I change one of those common 2.4GHz antennas to operate on 900MHz with the help of N1201SA?
@AndreasSpiess
@AndreasSpiess 4 роки тому
Not easy. It is Mitch too short.
@danr5375
@danr5375 2 роки тому
I'm lost. @13:48 you say, the antenna is ready, but the arrow is to the right of the dip. I thought that was the marker for the frequency you were wanting. If so, shouldn't it be at the bottom of the dip? Is the set of numbers at the top right the SWR reading? Please provide details of the display if you can. Good video, other than me being lost. Thanks
@AndreasSpiess
@AndreasSpiess 2 роки тому
You see the SWR and I did not get it exactly to the minimum. Because the minimum wanders if you touch the device with your hands it was good enough for me. Maybe you watch my other videos about Antenna design and VNAs.
@danr5375
@danr5375 2 роки тому
@@AndreasSpiess Okay, thanks for the clarification. I only wondered because you said, "exactly" and the frequency. It just made me wonder if I was looking at it wrong or not. Thanks again and 73s!
@majidnasr3329
@majidnasr3329 6 років тому
This video is awesome Andreas, Just wondering who are those 6 jealous people which dislike this wonderful video? 1.4K(up to the present) is much much bigger than 6 !!!! Probably their antennas are not adjusted exactly to your channel frequency !!!
@AndreasSpiess
@AndreasSpiess 6 років тому
I always get a few thumbs down. I have to live with it...
@tirexutus
@tirexutus 5 років тому
Do you have experience with the management of Rigexpert? I have the AA-600, but it remains at 600mhz maximum. I was looking at several models, which at least could analyze the 2.4-2.5Ghz band, for wifi antennas, and have appeared yours N1201A, the Vna Tiny and another one that is much more expensive, the KC901V, which comes to cover the wifi antennas of double band. I would like to know if the measurements of the N1201A are quite accurate, since I would like to use it to make high sensitivity Bluetooth antennas. Thanks for your mythical tutorials. I wait your answer. Best regards from Barcelona, Catalonia.
@AndreasSpiess
@AndreasSpiess 5 років тому
No, I have no experience with the Rigexpert. I do not see a correlation between sensitivity and measuring antenna curves. An antenna matches a frequency or not. The signal does not matter (as long as it is not very broadband) I compared my NS1201A with a professional VNA and it was accurate enough for me.
@allenrobnett8348
@allenrobnett8348 6 років тому
A very informative video, but I listened to the "power transfer" explanation at 5:20 to 5:45 minutes into the video multiple times to try to make sense of what was said. I concluded that there was a misunderstanding between the phrase "power transfer" and "current flow". The current flow is maximum at dc because the reactance of the inductor vanishes there. The current flow is also maximum at infinite frequency because the reactance of the capacitor vanishes there. But the "power transfer" also vanishes at both ends because the voltage drops to zero there, and power is the product of voltage and current. Power transfer is maximum at resonance precisely because that is the frequency at which there is an optimum compromise between voltage and current.
@AndreasSpiess
@AndreasSpiess 6 років тому
Maybe you are right. I assumed the circuit is in series (comparable with a cable) and assumed, that, if I have no voltage across this "cable", 100% of the power is transferred into the load. Your view is probably a little different.
@allenrobnett8348
@allenrobnett8348 5 років тому
Thanks for your reply. The video describes a parallel LC combination, which is why the current is maximum at the frequency extremes. There is no voltage drop across the LC combination, and all of the power is disastrously deposited in the source. If it had been a series LC, then there would be no current at the extremes, and again no power transfer to the LC combination at the extremes. In either case, maximum power transfer occurs at resonance, n'est-ce-pas?
@allenrobnett8348
@allenrobnett8348 5 років тому
The net effect is that the LC combination, which is simulating the antenna, gets maximum power transfer at resonance. If it is a parallel combination, then the source is in danger of being destroyed by too a high current at the frequency extremes. If it is a series combination, then the source is in danger of being over-voltaged (a factor of two, and maybe more).
@RobinsTools
@RobinsTools 6 років тому
Fantastic Tutorial! Thank you Andreas :)
@AndreasSpiess
@AndreasSpiess 6 років тому
You are welcome!
@stevemacbr
@stevemacbr 5 років тому
@Andreas Spiess - Great tutorial & (moderately) cheap Vector Analyser. . I did a quick calculation for the 1/4wavelength @ 868Mhz,... and it came out at 0.086m (8.6cm) - - Then I remembered the air to conductor factor,... x0.95 = 0.082 as per the on-line calculator shown. . - Am I correct in my assumption/memory of the material factor ?? - I am building a J-pole omni-directional to transmit centered @ 1820Mhz,... as a basis, I've calculated 1/4wavelength = 41.21mm making the 3/4wavelength (resonator) = 123.63mm - - Should I use the x0.95 materials factor (i.e. 2mm solid brass rod to be robust) to reduce the 1/4wavelength value right from the start,.. or test & cut back each time ?? - - Can you do a theory-tutorial on HOW the the omni J-pole antenna works, with emphasis on obtaining the 50-Ohm balanced connection point for the cable ??? - - Can you do a theory-tutorial on the design/construction of the (wideband) omi ceiling/dome antennas as used in office environments,... (see type ukposts.info/have/v-deo/iKVeo2qsaoyYs2Q.html ) and how these may be modified to become more narrow band around a center frequency ??? . Many thanks comment made on video >>> ukposts.info/have/v-deo/kqB8o4KtqIWI2pc.html
@AndreasSpiess
@AndreasSpiess 5 років тому
I am no antenna specialist. Maybe you look at this channel: ukposts.info/the/HqwzhcFOsoFFh33Uy8rAgQ.html . He builds a lot of 2.4GHz antennas.
@AntonioDellaRovere
@AntonioDellaRovere 6 років тому
Hi Andreas, the resonance frequency is lower than the frequency selected by the marker, isn't it? (@13:41). Great videos!
@AndreasSpiess
@AndreasSpiess 6 років тому
The marker is set manually
@AntonioDellaRovere
@AntonioDellaRovere 6 років тому
So you actually tuned the antenna to a freq. lower than the marker freq.?
@csvke
@csvke 6 років тому
Andreas, great work! I just looked it up and there seems to be a model called N2201SS which is an improved version with ‘dB measurement’ - I am still trying to understand what it does exactly. There is a RMB200 price difference between the two.
@AndreasSpiess
@AndreasSpiess 6 років тому
The more expensive one has two connectors. But I do not know if the software is ready to use both connectors.
@alanduncan4207
@alanduncan4207 5 років тому
I am curious about the degree to which optimizing the resonance frequency translates into functional improvements in the system in which the antenna is used, e.g. usable range, data error rates, dropped packets, and so forth.
@AndreasSpiess
@AndreasSpiess 5 років тому
I made a video about the "link budget" of wireless transmissions where you find all the calculations.
@alanduncan4207
@alanduncan4207 4 роки тому
Also very helpful. Thank you!
@TheTorgehal
@TheTorgehal 5 років тому
Hi and thank you for your very interesting video regarding antenna measuring and the VNA. I se that the vendor also have seveloped the N2201SS VNA with two ports. Would you consider testing and reviewing the N221SS extra features as well? In addition to power meter, it is supposed to support some extra measurement features. S21?. With so many poorly manufactured antennas for RC and FPV hobbyists, this kind of knowledge and tools are of great interest and benefit. Thanks! Kind regards Torgeir
@AndreasSpiess
@AndreasSpiess 5 років тому
I do not plan to test the N2201SS as most of my viewers do not need two ports.
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