Hybrid circuits for multioctave multiple-throw microwave switches

Single-pole multiple-throw microwave switches may be designed as extremely broad-band multistate low-pass filters. SPDT switch design using p-i-n diodes and high-impedance transmission line is described. Extension of the technique to multiple-throw switches is outlined. Two operating examples of the method, an 18-GHz bandwidth SPDT and a 12-GHz SP4T, are discussed.