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IWR6843AOPEVM: working with 57 GHz

Part Number: IWR6843AOPEVM
Other Parts Discussed in Thread: IWR6843

Tool/software:

Dear colleagues,

Hi! I have to questions about working with 57 GHz.

1. Do phase shifters work correctly with non-standard frequency 57 GHz? I mean does the added value of phase correspond to physical one which I set in mmWave Studio 02.01.01.00?

2. I get some artefacts in micro doppler map when working with 57 GHz. There are examples below. The main microdoppler corresponds to the walking human in front of a radar.

Can these lines be caused by nonlinearities, maybe in mixer or VCO, when working with non-standard frequency?

Or may be do you know another origin of it?

Best regards,

Grigor