IWR6843: damping refextion if air is humid

HS FAE Germany

Mastermind 32160 points

Part Number: IWR6843

Hello,
is the reflection of the the 60GHz signal damping in humid air? Do you have any experiences or measurements?

Regards, Holger

over 5 years ago

0 Vaibhav Mahimkar over 5 years ago

TI__Mastermind 23725 points

HI Holger,

Please check the following thread where similar discussion exists. We have not done any comparative measurements.

IWR6843: What are some ways to solve the oxygen absorption problem with this 60GHz device?

Regards,

Vaibhav

0 zigang Yang over 5 years ago

TI__Mastermind 39725 points

Hi, Holger:

Please see the video for mmwave performance over the rain. https://training.ti.com/sense-world-ti-mmwave-see-through-rain-and-walls-and-detect-small-objects?cu=1128486

Best,

Zigang

0 HS FAE Germany over 5 years ago in reply to zigang Yang

TI__Mastermind 32160 points

I want to know if you could measure humidity in a room with our radar sensor.

0 zigang Yang over 5 years ago in reply to HS FAE Germany

TI__Mastermind 39725 points

HI, Holger:

We have not done any experiment to measure humidity using radar. As mentioned in www.its.bldrdoc.gov/.../85-171_ocr.pdf

Gaseous oxygen and water vapor, suspended water droplets are considered to be the principal absorbers for the radar frequency. The propagation loss and delay will be related to humidity and oxygen. One thing they can try is to setup radar with a fixed target, then record the signal with different humidity level. One challenge I can see is how we can separate humidity effect from other variations like oxygen level, board temperature change and etc.

Best,

Zigang

0 HS FAE Germany over 5 years ago in reply to zigang Yang

TI__Mastermind 32160 points

I think you have to read the humidity level out of the SNR information. Right? Is the SNR information sensitive enough? What resolution can be expected?

Regards, Holger

0 zigang Yang over 5 years ago in reply to HS FAE Germany

TI__Mastermind 39725 points

Hi, Holger:

I believe that humidity will impact signal level. If the noise level is constant, then SNR can be used. But again, we never did any test. I am not sure what resolution to expect.

Best,

Zigang

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IWR6843: damping refextion if air is humid

IWR6843: What are some ways to solve the oxygen absorption problem with this 60GHz device?