A Plasma Guide Microwave Selective Coupler (1961 [MWSYM])

A new type of microwave coupler, the plasma guide coupler, has been investigated. The coupling of microwave power via this plasma guide coupler can be varied electronically over a range greater than 30 db over an entire wavegide band. Pulsed power levels of more than 100 watts can be handled. When operated as a switch, a switching time of 5 µ sec has been observed. The plasma guide coupler is shown in Fig. 1.