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Low cost mmWave 60GHz radar sensor for advanced sensing

infineon.com

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Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#51

Post by goochphd »

Animats wrote: post #18

What's cute about this is how far they went to make hobbyists happy. There's a way to connect it to Bluetooth and WiFi, and an Android app. There's compatibility with some Adafruit products. That's unusual for IC data sheets. This is a phased array device. Angular resolution 20 degrees, range resolution 1 meter. It's not a Doppler radar, so it can detect fixed objects. So if you're using it for people detection, you…

As far as seeing and ignoring fixed objects, you can also remove any returns that have a near-zero velocity in radar and focus only on those objects that are moving.

Of course, indoor settings have a lot of non-stationary objects as well that might not be targets of interest to you, like fans, curtains blowing in the breeze, etc. So you can also develop algorithms to remove those signatures too.

Seeing fixed objects can be beneficial as well, for example, if you have a sensor deployed in a room but you don't know a priori what the room looks like. Longitudinal results and long range statistics can take you pretty far in seeing the room extents and layout and furniture, etc. Though a lidar sweep is better if you can get it

Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#52

Post by hdgvhicv »

ivape wrote: post #30
RossBencina wrote: post #27

Earlier quoted context omitted.

What's the best "Margins News" site today?

Slashdot is HN minus good behavior and a touch of 4chan. Their site is such shit with the ads though.

Slashdot was certainly dead after taco left

Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#53

Post by ShadowBanThis03 »

monksy wrote: post #9
Liftyee wrote: post #4

Pleasantly surprised to see electronics parts manufacturers on front page HN. The advancement of sensors nowadays is staggering - I'm reminded of the recent airborne dust sensor that's literally orders of magnitude smaller because it uses a new backscatter detection mechanism. All this technology available at very reasonable prices too.

It is nice to see more technically oriented things on the main page. It is frustrating to see very high level more businessy topics.

[dead]

Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#54

Post by amelius »

amelius wrote: post #42
ethan_smith wrote: post #40

Earlier quoted context omitted.

60GHz is actually poor for through-wall detection as this frequency is heavily attenuated by building materials - lower frequencies like 24GHz or UWB radar would be more suitable for both applications you mentioned.

Why do you say 24GHz and not, e.g., 100MHz? (Apart perhaps from it being within a reserved band).

Update: chatgpt told me that the wavelength (3m) is too large to detect humans, antenna size would be impractical, more power would be needed for transmission, and reflections are more of a problem than with higher frequencies.

Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#56

Post by thatcherc »

Catbert59 wrote: post #24

Have a look at Hi-Link from China (on Aliexpress). They offer 50GHz, 10GHz, 24GHz and 60GHz FMCW radar module boards for 10-30€ which are easy to reverse engineer on firmware and PCB level. A lot of them are CW radars, a few FMCW and they also use the Infineon 60GHz radar chips. Very unusual for Infineon: with all tools and datasheets available without signing a NDA. Down to the register level. There's an interesting…

> The analog ones are easy to play with. You just need a DAC to drive their VCO and then can sample the I/Q pins with an ADC

Do you have any reference or notes on how to access the IQ pins on one of these devices (ideally one of the FMCW ones)? I've been wanting to play around with one of these 24 GHz or 60 GHz units for coherent radar but it seems like most of the boards only report on distances over serial links. If there's an easy way to tap into the analog IF signal after down conversion I'd love to see how to do that!

Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#57

Post by hnuser123456 »

chasd00 wrote: post #50

obstacle avoidance for rc airplanes would be nice, maybe combine it with one of the autopilots out there. Learning to fly rc airplanes is pretty easy these days, the flight controllers can hold your hand through just about everything.

I built a FT Explorer with their FT Aura gyro system and it's so much more fun flying in a gentle breeze when not having to worry about keeping the plane upright and level. Radar ground detection and obstacle avoidance would be a crazy cool addition.

Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#58

Post by [deleted] »

thatcherc wrote: post #56
Catbert59 wrote: post #24

Have a look at Hi-Link from China (on Aliexpress). They offer 50GHz, 10GHz, 24GHz and 60GHz FMCW radar module boards for 10-30€ which are easy to reverse engineer on firmware and PCB level. A lot of them are CW radars, a few FMCW and they also use the Infineon 60GHz radar chips. Very unusual for Infineon: with all tools and datasheets available without signing a NDA. Down to the register level. There's an interesting…

> The analog ones are easy to play with. You just need a DAC to drive their VCO and then can sample the I/Q pins with an ADC Do you have any reference or notes on how to access the IQ pins on one of these devices (ideally one of the FMCW ones)? I've been wanting to play around with one of these 24 GHz or 60 GHz units for coherent radar but it seems like most of the boards only report on distances over serial links. I…

[deleted]

Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#59

Post by Catbert59 »

thatcherc wrote: post #56
Catbert59 wrote: post #24

Have a look at Hi-Link from China (on Aliexpress). They offer 50GHz, 10GHz, 24GHz and 60GHz FMCW radar module boards for 10-30€ which are easy to reverse engineer on firmware and PCB level. A lot of them are CW radars, a few FMCW and they also use the Infineon 60GHz radar chips. Very unusual for Infineon: with all tools and datasheets available without signing a NDA. Down to the register level. There's an interesting…

> The analog ones are easy to play with. You just need a DAC to drive their VCO and then can sample the I/Q pins with an ADC Do you have any reference or notes on how to access the IQ pins on one of these devices (ideally one of the FMCW ones)? I've been wanting to play around with one of these 24 GHz or 60 GHz units for coherent radar but it seems like most of the boards only report on distances over serial links. I…

https://github.com/dm5tt/LD1125H_ReverseEngineering here.

Re: Low cost mmWave 60GHz radar sensor for advanced sensing

#60

Post by thatcherc »

Catbert59 wrote: post #59
thatcherc wrote: post #56

Earlier quoted context omitted.

> The analog ones are easy to play with. You just need a DAC to drive their VCO and then can sample the I/Q pins with an ADC Do you have any reference or notes on how to access the IQ pins on one of these devices (ideally one of the FMCW ones)? I've been wanting to play around with one of these 24 GHz or 60 GHz units for coherent radar but it seems like most of the boards only report on distances over serial links. I…

https://github.com/dm5tt/LD1125H_ReverseEngineering here.

Thanks! The author's blog is a great find as well - https://www.dm5tt.de/
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