Switchable Frequency-Selective Surface for Multistate Highly Selective Transmission in Ku Band

Abstract

This letter proposes a switchable frequency-selective surface (FSS) that achieves the switching of four transmission states in Ku band. The aperture-coupled patch resonator structure is adopted to achieve spatial filtering with high selectivity. Different patch resonators are loaded on the top and bottom layers, and four p-i-n diodes are embedded in each layer. By applying different bias voltages to the top and bottom layers, respectively, the frequency reconfigurable transmission of four states across 13.2 GHz to 16.7 GHz can be achieved. A 160 mm × 160 mm FSS sample is fabricated and measured. The insertion loss of the four transmission states is between 1.5 dB and 3.6 dB. It has a dual-polarized function and 30° incident angle stability. This work verifies the possibility of using switchable FSS to realize frequency hopping transmission in Ku band for the first time. It expands the application scenario of integrating active FSS with Ku-band antennas.