A Dual-polarized Wideband Reconfigurable Reflected / Transmitted Filter Array Antenna Element

In this paper, a dual-polarized wideband reconfigurable reflected/ transmitted filter array antenna element is proposed. The proposed array element consists of three metallic layers and two substrates. Top and bottom metallic layers are designed as square patches with same size, and the middle layer is set as a metallic square-ring slot, where four controllable switches are loaded symmetrically on the square-ring slot. By altering the ON or OFF of four controllable switches, the element can achieve the reconfiguration in the reflection and transmission state. Meanwhile, the element adopts symmetrical structure to realize dual polarization characteristics and has a wideband performance due to its frequency selective surface structure. The simulated results demonstrate that the frequency band of –0.9 dB reflection magnitude and –1.5 dB transmission magnitude both ranges from 8 GHz to 12 GHz.