IWR1443: contain an interference pulse in the Range Profile diagram using PCB designed by myself

This is the circuit board that I designed,the  circuit board’s  voltage quality is almost the same with IWR1443BOOST

Hello User,

I've forwarded your query to our expert here. 

Please expect a response within two days. 

Regards,

Ishita

Hello Peng,

What is the IF frequency of the "interference spike" ? What is the power management network used? Can you share the schematics?

Regards,
Vivek

iwr1443.pdf

Thanks for your reply. I'm sorry i don't kown the IF frequency of the "interference spike". I designed and operated according to IWR1443BOOST. I guess whether the calibration is the reasion.

Hello Peng,

you can compute the IF frequency from the exact range (distance ) of the spike. 

The IF frequency is given by = (range * 2* Slope of the chirp)/ speed of light.

Based on the chirp slope you have (in the profile config) and the exact range at which you are seeing the spike can you tell us the IF freq?

Regards,
Vivek

Thanks. IF frequency=4MHz, it is the same as the switching frequency of the power supply.