AWR1843BOOST: Maximum Elevation angle for AWR1843BOOST

Hi,

I have the following queries:

1) In AWR1642BOOST, only 2 Tx antennas are present and no elevated antenna is present in the middle of the two Tx antennas, So how elevation angle is achieved in AWR1642BOOST ?

2) In AWR1843BOOST, I understand that because of the spacing between the receiver antenna is ƛ/2, the maximum theoretical angular field of view is ±90°, but what is the maximum theoretical elevation FOV for AWR1843BOOST ?

3) Is it possible to achieve ±25° elevation FOV in AWR1843BOOST ? If it is possible then what is the maximum range ?

4) If it is not possible to achieve ±25°elevation FOV in AWR1843BOOST then what is the modification required in the design of AWR1843BOOST antenna ?