AWR1843: How to select 2 azimuth antennas of AWR1843 in mmWave studio

Referring to the user's guide that you were also looking at in the original post. In the next page of that (page12), Figure 11 and 12 shows the antenna pattern. Coming to the second point, antennas are designed to cover both azimuth and elevation angles, there are not separate antennas dedicated to each plane. I think you are confusing field of view with angular resolution. Tx2 will help in achieving higher angular resolution. I understand the naming between the user guide and the mmwave studio is not matching but, in this case, Tx0 from studio would correspond to Tx1. Tx1 from studio would be Tx2. Tx2 from the studio would be Tx3. 

Regards,

Aydin

It cleared my problem. So, based on this I will select Tx0, Tx2 in mmWave studio to cover only azimuth plane

But one thing I am not understanding is you told "there are not separate antennas dedicated to each plane."

But As far as I know we can select two Tx only if we want azimuth plane and three Tx if we want both azimuth and elevation planes. This I got from the mmWave studio channelCfg discription. 

Am I not correct?

I will clarify a few points. You can select only TX0 or TX2 and still detect an object, however the resolution on the elevation plane will be poor but that does not mean the elevation is 0 degrees. If you select TX0 and TX1, that's when you will have a better resolution on the elevation plane but poor in azimuth. If you read the paragraph from the user guide you have attached in the original question, the degrees reported are when all the TX0, TX1, Tx2 are enabled. At the end, it depends on your application/use case and what you are trying to achieve. Hope this clarifies the doubts.  

Regards,

Aydin