The AST28D from AST Microwave is a Waveguide Switch with Frequency 26.5 to 40 GHz, Power dBm 60 dBm, Power Watts 1 kW, Insertion Loss 0.15 to 0.45 dB, Isolation 50 to 60 dB. Tags: Waveguide, Electromechanical. More details for AST28D can be seen below.