Resonating photoconductive microwave switches for reconfigurable antenna system

Photoconductive microwave switches with inline-embedded resonating filter for the application in reconfigurable antenna systems are presented. The resonating filters are used to block microwave signals under the dark state so that it can effectively improve the isolation of the devices. These novel switches are numerically simulated by commercial software and results show that the proposed switches have great improvement of the isolation by 20dB than the photoconductive microstrip switches previously reported. The maximum isolation obtained at X band can be up to 53dB.