X-band tunable frequency selective surface with embedded bias network

摘要

An x-band tunable bandpass frequency selective surface (FSS) is presented in this article. The designed FSS is composed of three stacked metallic layers. They combine each other with metallic via, which provides the bias for the varactor at the same time. This configuration can decrease undesirable response associated with the added bias grid. The simulation is provided to illustrate its feasible. The results show that by changing the varactor capacitance from 0.1pf to 0.4pf, the center frequency of the designed FSS is tuned from 8.5GHz to 13GHz and with an insertion loss about 2dB.