Shahriar *please* do a series on microwave phased array theory. It would be awesome if it is accompanied with a practical implementation project. The topic is still my kryptonite even after years of studying it. Thanks for the great videos.

What a nice video. I don’t know much about RF, but this was enlightening. Thanks!

Wow. RF stuff is crazy. Damn, there are so many things to learn in this world. I guess I have enough projects for 5 years ahead, but there is always something cool in a completely different domain. Great video btw!

awesome microscopy....Very versatile unit you have allowing for numerous perspectives in doing layer analysis....glad you have the will to accumulate & use all the various technologies you have in your lab......geek candy @ the highest level. It also is quite enlightening to see how the various devices are built @ microwave frequencies...golden as always

Great video. Love the high power shots. I’m blessed to get to play with a Keyence VHX and an older Nikon at my job inspecting RF/Microwave modules and it never gets old.

These modules impress me all the time. I love how much they can deliver with simple architecture. Very good tutorial, as always.

I love when things are explained well. Thank you for taking the time to share. Not everyone has access to such analytical techniques. It's one thing to just describe a circuit with block or circuit diagrams. It's completely another to pull things apart and show the logic of physics in construction. Thank you.

Excellent video, as always. I'm using this IC to make a 24 GHz FMCW Doppler radar. I'm going to extend range by adding a much larger antenna array, a power amplifier, and my own receiver amplifiers before and after the IC ports.

Awesome walk thru!!! Thank you for your excellent presentation!!!

Really interesting, and the really close ups especially, thanks!

Loved the video, thanks Shahriar for another one. As to your question, yes always appreciate more depth and explanation. Wish I could attend the conference for fun.

I got one similar module for experiments with it. Thank you very much for your explanations about these 24 GHz microchip architecture. This helps me a lot.

Thank you! I learned a lot from your videos ❤

Wow I'm soo glad to see that video :o Thank you so much!!!! I know all that techniques but see it and explain it in that way is exceptional. Thank you soo much !!!

amazing.. thanks a lot

This was very neat.

Thks ever so much

the RF is just awesome

I was recently looking at a patent for a tuned resonator that looked like a rectangular box with several compartments, but the text was talking about GHz range frequencies, implying that it was a very tiny box indeed. I was excited to notice this structure at 23:24. It's sitting just to the right of some inductors, and to the left of the amplifier that's just off the nose of the fuse-tuned structure. When I was looking at the patent, I didn't realize it was talking about microchip-sized structures, because it was off-subject to what I was searching for, so I didn't look too closely. That was pretty exciting to find an accidental discovery "in the wild", so to speak, but I am not so naive to believe that search engine miss didn't influence this video suggestion later.

your so very smart....i'm speechless about the things surround you....

Excellent. Please remember to use the full name for the components and not just their initials. Us noobs need that help to be able to understand what you are teaching.

The fuses were extremely interesting. I wonder what's the impact of the extra load introduced by those self test paths once the fuses are blown, since they would turn into somewhat long shunt open stubs. Guess it should be fine when your output power has a range from 2 to 10 dBm :D

Shahriar, I reiterate on doing a series on microwave phased array theory. This walk through had everything needed to generally understand the design achievements in silicon as well as the functional aspects.

When I see the block diagram I always assume the circuits to be super huge and complex. Very interesting to see how simple they really are. You could draw a circuit diagram for this on a single paper and understand most of it with normal RF knowledge

very nice look thankyou,

Good luck with conference and please cover some RF metrology there, if you plan to make conference coverage video. I'd expect it is also important to ensure all GHz are correct and traceable for successful designs. What are metal boxes fill around the empty areas? Just to help with uniform etching during chip lithography and production? Doesn't look like they trying to hide anything.

have fun with it

I would love to see a video on phased array theory!

It might be interesting to show some microwave PCB design by essentially taking an HB100 doppler module as the base, and modifying the design to allow injecting an externally generated IF (in quadrature, if easier) by which the local microwave oscillator or the received signal will be offset, so the downmixing won't center speeds at 0Hz. Also, not having the downmix go to zero-IF quadrature as would seem an obvious alternative, would preserve the precious DC offset of a static reflector a fractional number of wavelengths in front of the antenna array, along with all the other benefits like escaping 1/f noise and far less linearity needed from the ADCs that feed the downmix centered on the IF into further digital processing. If it's the TX side that gets frequency offset, having multiple of these fed from the same microwave amplifier, but different offsets should allow frequency-division-multiplexing in the receivers when the IF's are spaced enough to account for possible doppler shifts but are otherwise close together. Separating them could be done in the digital processing, and with sufficient spacing of the antennas moving objects could get 3D movement computed, instead of the normal 1D limit of a single TX/RX pair. It's just that coming up with a design anywhere near as clever as the HB100 isn't straight-forward.

very nice! I miss IC design!

Great video again, cannot join the SFO meeting, would have been great to meet you in person of course.

I worked with the P2G DK of Infineon for my master’s project (last year) but I think most of the DK for radar of Infineon are discontinued by now 😅 and they were not good with tech support from my experience during the development of my project

Blockdiagram show oscillator with single-ended output and functional baluns to convert. But chip layout not. Also curious about the PN of the unlocked oscillator at 20Hz. Seems to be the short trip around time present enough time phase correlation so that PN do not hurt. PN spec at 100k seems only an device emission topic.

Maybe make a video about die components, like how to recognise transistors, inductors, resistors etc a die.

Wow they didn’t teach us this in my bachelor of ICT… nice video.

Next month I get a small 1.5kW X-band radar for a sailboat to play with so I am gathering information. The antenna looks like that on the doppler. Is that stripline or a coplanar waveguide ? Can you make a video about normal radar like used on a ship

IQ doppler is just so much more powerful than the HB100-style direct mixer (but it does take more than 2 RF transistors, once the LO is included).

19:54 how did you learn all of this? Are these path made out of copper on the chip? ... or p/n type material?

25:47 how do they "solder" these wires on there? also, on the beginning of the wire it's easy, just point and stick, but how do they fix the other side of the same wire, how do the rotate it 180º and get the "beginning" again.

Those tiny imperfections you show near the end might give your device a very (almost infinitesimally) small signal that could be used to distinguish between two devices of the same type. Like if you took 10 of those modules, you could probably select 2 specific modules that you could always tell apart. I wonder if this type of signals analysis is feasible for keeping track of which source is sending... (not just with these modules, but in general)

I know that this is probably not the type of equipment that you usually play with, but can you do a review of the tinySA Ultra? I think a lot of people are quite interested in it at the moment, as it is very affordable (~150$).

Really interesting, thanks! One question though, how do they burn discrete fuses in a parallel array?

Would you be interested in being sent several u.fl active GPS antennas for tear down and reverse engineering?

Great educational videos as usual and very inspirational as well. Thanks It would be nice to see a couple of interviews with other people in the world of RFIC (maybe Razavi, Tomas Lee, ....)

i just learned there is a 24GHz radar chip from infineon which is very common in the market and cheap.

I'm guessing this is the part used in Garmin Varia radars used on bicycles.

I wonder is there a way to recover those fuses?

Did you decap the ic or did you have a bare die that you used? Also for videos like this it would be useful to have some kind of scale to get an idea of the size of the components on the chip. I am guessing they are not too small since you did use a microscope. Still I am not sure if what you were showing were tens or hundreds of micrometers in size.

I would have liked to see the board hooked up and demonstrated. Other than that, I liked this video

Hi, I found the module (infineon DEMO SENSE2GOL, right?) and it only reaches 20m. Is there a similar module, which can read speed up to 100m? I want to stick it in my car and measure if I have a constant distance to the car in front of me. A manual Radar cruize-control retrofit. Or is there a better solution I am missing? cheers :)

How do they blow the fuses? Laser? Current?

OK, PCB we have. Now, can you extract firmware? 😉

The inset of the patch is for making a nice match right? It connects the trace to the point where the standing wave on the antenna works out to for example 50Ohm. I don't believe the directivity or bandwidth of the patch is really a function of this.

Are those fuses blown by electricity (seems like micro pads near them) or is always a laser used to flip them ?

I'm saving to buy a DIC, so expensive :(

seems weird to share the same 3.3V rail for the analog and the digital. The digital dynamic loading can put noise on the analog load. No Bueno

Your RX side drawing may be a little wrong. The baun is the impedance match to the next circuit. On the RX side, it will switch for a small period for the input to the doppler shift. Then, the TX will be turned on for the in this case the anolog frequency to be transmitted. So the arrow was around the wrong way. But I still enjoyed the show.

needs more baluns

25:00 is the same vibe as a tik tok dance in front of luxury cars

🧡🤎💜

I would love a breakdown of phased array antenna design! I'm one of those people for whom RF borderlines on the Dark Arts. 🪄 I'm fairly certain that most of what I _do_ know was learned from your channel. Any knowledge you'd care to impart is definitely appreciated here!