Why azimuth resolution is 1.4deg? And elevation is 18deg?

[tony_lth]

Hi, Gurus,
I found in the TI AWR2243 pdf, it says in 2.3.1:

86 element virtual array – enabling 1.4 degree angular resolution

4 element virtual array – enabling 18 degree angular resolution

I am curious how to determine 86 element?
The radar antenna layout as the picture, the upper is 16 RX antennas, the lower is 12 TX antennas. Each IC has 3TX and 4RX.
Best,
Tony Liu

--- Updated Nov 18, 2022 ---

And I found the elevation 4 elements array are not spaced equevalently.
So how to determine the elevation resolution is 18deg?

--- Updated Nov 18, 2022 ---

In Fig6， it demos the arrays.
And in Fig7, it present the simulate results.
I wonder how to get Fig7 results in matlab? how to program?

 

[BradtheRad]

Since one byte contains 256 possible values, it's convenient in some computer calculations to divide a circle into 256 units called brads (instead of degrees or radians) (in no way related to my first name). One brad is 1.40625 degrees.

 

[tony_lth]

@BradtheRad, you are right.
I just try to find a program to simulate it.
It seems that I need to program a matlab file by myself.