Novel High-Performance SIW Cavity-Based Switching Structures

In this article, novel architectures for high-speed substrate integrated waveguide (SIW) filtering switches with high-power handling are presented. A four-port double-pole, double-throw (DPDT) switch and a three-port routing demonstrated as proof-of-concept. For both switches, the structure consists of main switching circular cavity concentric posts. These posts enable excitation multiple resonant modes. The modes aligned in frequency using loading capacitances. p-i-n-diodes used to short Consequently, generated fields interfere constructively destructively at output ports. Concept-proving structures designed, implemented, measured. SIW-DPDT switch, measured insertion loss isolation 2.95 26 dB achieved, respectively, 7.4 GHz. Furthermore, 2.98 30 obtained SIW-routing 7.7 losses include cavities. proposed share same technique. As result, power measurements performed only which is handle 40 dBm input power. Also, employed technique exhibit speed less than 80 ns.