CCS/AWR1243: Cascade radar calibration

Jacki Hsu

Intellectual 330 points

Part Number: AWR1243

Tool/software: Code Composer Studio

Hi TI team,

Recently, we tried to calibrate the radar with the reflected corner put at 5 m as you mentioned in datasheet.

But we think the distance 5 m is still in the near field as using the 86 antenna.

Isn't there an extra phase exist between each antenna as the target at the far field ?

We find the angle of azimuth and elevation at far field will be wrong after the calibration is done.

But if we do the calibration by put the corner at far field (R~15m), the angle of azimuth and elevation at far field are correct and stable.

We want to know how you team do the calibration at near filed and the angle of azimuth and elevation are still correct at far field.

Thank you so much.

over 6 years ago

0 Vivek Dham over 6 years ago

TI__Guru 58035 points

Hello,

you are right that having a larger corner reflector (high RCS) at larger distance will give you a better calibration since the zero angle error (placing the corner reflector at exactly 0 deg) at larger distances would be lower. The reason we use 5m distance is mostly due to the availability of larger clear space. If you have a larger space and a larger RCS corner reflector (to make sure the reflected signal has high SNR) then it better you use a larger distance like 15 or 20m.

In terms of near field effect of the antenna, 5m for a small patch antenna would be in the far field range definition.

Regards,

Vivek

0 Jacki Hsu over 6 years ago in reply to Vivek Dham

Intellectual 330 points

Hi Vivek,

Got it. The aspect is the same as us.

Thank you so much.

Best regards,

Jacki Hsu

Code Composer Studio™︎

Code Composer Studio forum

CCS/AWR1243: Cascade radar calibration