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IWR6843AOP: Beam Steering Vector

Part Number: IWR6843AOP

Hi,

According to the formula listed in the Beamsteering for Corner Radar Reference Design, the steering vector is

`[0, 2*PI*d2*sin(theta)/lambda, 2*PI*d3*sin(theta)/lambda]`

My understanding about the antenna pattern used in ISK-ODS is that the 3rd transmitter is on the vertical direction so that its delay phase should be PI rather than 2PI :

`[0, 2*PI*d2*sin(theta)/lambda, PI*d3*sin(theta)/lambda]`

Is it right? please correct me and give a formula if my understanding is wrong.

Cheers,

Tom

• Hi Tom,

This beamsteering design is intended for use with the ISK - in which the second antenna is elevated. This is not intended to work with the ISK-ODS.

Regards,

Justin

• HI, Tom:

For the beam steering to azimuth = theta and elevation = 0, the phase can be always calculated as:

`[0, 2*PI*d2*``sin``(theta)/lambda, 2*PI*d3*``sin``(theta)/lambda]`

Where d2 is the antenna space between TX2 and TX1.

d3 is the antenna space between TX3 and TX1.

In the case of ODS pattern, d2 = 2*lambda, and d3 = 2*lambda.

Best,

Zigang

• In reply to zigang Yang:

Hi, Zigang,