IMST offers an external patch antenna with one transmit and two receive antennas on a multilayer PCB. The antenna feeding network is on the backside of the PCB covered by a shielding cap. The antenna has three coaxial connectors “RCP-2.92 right angle jack” and can be directly connected with the radar module sR-1030e with male-male straight adapters SMA2.9.
The 3-dB antenna characteristics and antenna gain (without housing) are:
Rx1/2: 110 deg Azimuth, 23 deg Elevation, 9 dBi gain
Tx: 90 deg Azimuth, 25 deg Elevation. 10 dBi gain
A second antenna with these preliminary parameters was recently designed:
3-dB antenna characteristics and antenna gain (without housing)
Tx: 90 deg Azimuth, 33 deg Elevation. 9 dBi gain
See Data Sheet: HR_HZ_A-sR-1032-Radar-2017_E