The AST137D from AST Microwave is a Waveguide Switch with Frequency 5.85 to 8.2 GHz, Power dBm 66.98 dBm, Power Watts 5 kW, Insertion Loss 0.05 to 0.50 dB, Isolation 50 to 70 dB. Tags: Waveguide, Electromechanical. More details for AST137D can be seen below.