T/R Switches and Modules for Ice Sounding/Imaging Radar

摘要

High-power transmit/receive (T/R) switches for use in multi-channel ice penetrating imaging radars are capable of sustaining peak power levels exceeding 1000 W. They are based on a balanced topology and built using quadrature hybrids and actively biased PIN diodes. Insertion loss is lower than 1.3 dB from 100 to 350 MHz and lower than 1.6 dB from 150 to 600 MHz. Isolation in transmit mode is higher than 85 dB across both bands with turn-on and turn-off times shorter than 1300 ns and 200 ns, respectively. Both designs were successfully used in multi-channel radars for measurements in the Arctic and Antarctic.