A bi-directional quasi-optical lens amplifier

A 10-element bi-directional quasi-optical lens amplifier array is presented. The amplifier is designed for X-band, and operates in transmission mode. SPDT switches are used to switch between transmit and receive amplifiers. An ON/OFF ratio of 25 dB is measured for both transmitting and receiving modes with associated amplifier gains of 5 and 10 dB.