The big channels only give you the theory, but to actually make one and test it shows you so much more. Good work.

Fascinating, Ive never done anything with RF stuff but I have seen these geometries and wondered what on earth they did. This is the best explanation Ive ever seen thank you. Way out of my territory but interesting to have a little understanding.

Back in the day I used to make etched PCB's and used plastic tape to cover up the bits of copper that I did not want to get etched away; but I never thought of this method of adding copper tape to create traces... Great experiments and video!

This is the coolest thing I’ve seen all week thanks for sharing!

Finally found the channel i was looking for!!!!!

Enjoyed following this through. It's given me ideas!

This video gave me some lights about PCB microwave filter design. Thanks!

Truly awesome!! Thank you for such a great explanation! :)

Great tutorial! Thanks!

very cool spectrum analyzer!

Great video mate!

Amazing video.

This is a microstrip-line. There is literature up there. I like the filter Butterworth maked with piece of metal and isolating materials, instead of RC opamps active circuits. That push Butterworth beyond, 91 years after. P E R F E C T

Very eye opening !tnx

QUCS user interface is actually very similar to Keysight ADS. QUCS being free is great value for money :) Of course ADS/PathWave is a lot more feature complete and has an excellent support.

Bravo! Great!

Great tutorial and video. Do you recommend any particular books for filter design too ?

great video i love it

Well that was an incredibly interesting video, May I ask if you will be willing to show the procedure to use an spectrum analyzer to tune an Dipole Antenna to the correct match frequency? thanks in advance.

Very cool and informative piece! How do I get hold of one of those rulers you're using? Thanks!

Thank you.

Good video

wow that is what I was struggling to Look for understanding

Make more of these videos... You are awesome! Please don't stop... I know its been a long time. You can collaborate with Ben Eater

great tutorial.will you please suggest a good book for microstrip filter design

great practical aproach! that's what most people are looking for. still, I don't think that board is fr4. it looks too yellow.

Congratulations about the ruler and the "tape on PCB" prototyping method. Way cool. I have a note: that radial "radio stub"... you mention that it has a slightly broader bandwidth compared to the linear stub you presented a minute earlier. I believe that this "broader bandwidth" is a feature of your imprecise manufacturing, rather than of the shape in theory. Your radius (circle section) is not precise enough. (did you use a scribing compass?) If it *was* precise, I daresay its bandwidth might be on par with the linear stub, but more importantly, it should give a deeper attenuation at its center frequency - *that* I believe is what the shape is for. As the wave spreads out through the circular section, the "transmission line" gets gradually broader = lower impedance, and at its lowest, it meets the open end (infinite impedance) and, being a quarter-wave stub, it reflects that mighty impedance step into a perfect short at its narrow end.

Pretty cool ...and simple.physics

great ... thanks and greetings from north-sweden .. carlo SA2KHG

Hey, do you know if I could get the Gerber files for that ruler? It looks awesome!

Nice, have you experienced how to bulld PCB antennas? Another thing how to buy the "RF rule tool" for tuning the path length against freq? Thank you

Could you do the filters also with the plasma sputtering/coating method by applying stencils`?

Would be interested to see if YBCO tape would work in this application

The substrate material that you used is textolite, not FR4. Textolite has an ε relative of 8-11. This is where the shift in frequency comes from, I suppose.

It would be nice if you could make a video explaining S-parameter analysis and how it differs from normal AC analysis

Great Video. Where Can I get one of these COOL RULERS? What is it called, can you post a link please?

The width of the trace sections is either 1m or 50m? I think you're going to need a bigger PCB! Did something drop a unit somewhere? I assume it's supposed to be mm.

Super super vid.

Exacly How i Made My Antennas, Chopped On On VNA While They Show What I Wanted Them to Show :)

If we use a very nano conductive material instead of copper tape, will the the filter work?

two questions. how to use the pattern on the ruler? do we need to copy them or we can use the practically by soldering?

I saw xkcd Up Goer Five poster on the wall

if soldring is not issue can we also use Al tape ?

Not Microwave Frequencies,But A LOT OF Freqauencies That Are In 20 Meter Band And Belove, Like 80 ! Just Yestarday Made Filters Like That !

I downloaded qucs (version 0.0.19) and installed it. When I try to paste the schematic into the work window, it won't let go of the curser and keeps dropping more copy's of the the paste on the desktop every time I left click the mouse. It's like having gum stuck to your shoe!

niiice!

I'm not very knowledgeable in this area but I have some ceramic bakelite, mica & G10 materials which you could use. Let me know if you are interested... PS - I like your channel. Subscribed!

Interesting.

Love the ruler! Where did you get that one?

Well, this is an old video, I hope you see this messege. I want to ask you how did you change the QUCS schematic strip sizes to the shorter strips you made with de conductive tape? For example, the first inductor is 7 meters long and 1 meter wide and the lines you made are far smaller. Thanks.

Very good video, I learned a lot. But tell me, can you think as fast as you talk? I have to drastically reduce the playback speed.

Hi how can I send you the picture of bandpass filter which I have and have few questions relating it

Sehr gutes Video, ich habe eine Menge gelernt. Aber sag mal, kannst du genau so schnel denken, wie du redest? Ich muss die Wiedergabegeschwindigkeit drastisch reduzieren.

where can I buy that ruler with those labels?

It is possible to make a Cell phone 3G signal amplifier (booster) circuit using your microstrip building technique????

you will have much better luck with FR-408 or Rogers-4003C. Also use the dielectric constant from the material data sheets

can share link where i can get fr4 sheets blank

I'm guessing this method wouldn't be very "practical" for say a 7.0 MHz 40M band filter due to the element size would it? Unless perhaps your elements zig zagged back and forth to get the right electrical length in a more compact space?

What type of copper tape is this?

Careful waving that knife around :-)

Is there a lower frequency where this stops working? Or could I make a 160m filter this way?

Do you think Aluminium tape can be used instead of Copper tape? It is hard to find copper tapes in my town.

Which tape are you using? Can you post a link? I want to buy it

Where can I get that ruler?

that pcb materials are not FR4 they are probably CEM-1 or CEM-2 type. the dielectric is unknown and not suitable for HF circuits.

SEBEBEBE

Dude. Where do I get that ruler??? 😂

Now you have Qucs-S instead of obsolete Qucs.

how do i design a microwave filter at 4 GHz center frequency?

Hi sir. From where i can get this Ruler?

Your boards look like FR2. Maybe you can improve by using FR4.

I think your copper backside is ressanating, try a clean board :-)

Te 21mminut filmu jest więcej warte niż semestr przedmiotu mikrofale na PWR

bad boys play with bad toys

Get rid of that old spectrum analyzer/tracking generator and get a real neteork analyzer!

Nah dude it’s you

what is a quality factor? The rejection is not deep - I had the same result with low frequecy high voltage ceramic capacitor and piece of wire: resonance was roughly at 20MHz but bandwidth was several MHz.when I changed a capacitor to RF type (NP0) - quality factor was much increased.