What's wrong with this antenna design?

[tony_lth]

Hi,
The following picture is an antenna design.
TX1 and TX3 antenna are 2X4 patch, and TX2 is 3X4 patch, with all RX antenna is 1X4 patch.
So what's wrong with this design?
Best,
Tony Liu

 

[volker@muehlhaus]

It seems that your data import went wrong, and your patch antennas are just outline (wire) instead of filled areas !?

 

[tony_lth]

volker@muehlhaus，thanks for comment. They are filled, just because of my paste so it looks.​

Someone said using the aforesaid config of antenna, it's hard to test angle because calculation chaos by mixing 2X4 and 3X4 patches.
So all are 2X4 or all are 3X4 is OK, but mixing 2X4 and 3X4 isn't.
I just want to confirm that and are curious about its principle.
Thanks.
Best,
Tony Liu

 

[vfone]

Usually this configuration is for dual mode MIMO radar.
I guess the TX antenna 3x4 is for long range and the other two 2x4 are for mid range.
In this situation if all the TX antennas are not the same, the processing (and calibration) take longer time.