Dual-polarized broadband high-gain Fabry-Perot antenna with radiation pattern reconfigurable using liquid-based PRS

In this paper, a dual-polarized broadband high-gain radiation pattern reconfigurable Fabry-Perot antenna is designed, including a feed source section with ground contact and a partially reflecting surface (PRS). The antenna is fed by a 1×2 antenna array, and a 1 × 2 patch array coupled by two orthogonal slots is designed as the feed source of the FP antenna to achieve dual polarization. The partially reflecting surface consists of multiple F4B substrates with patches and PMMA containers, and the radiation pattern reconfiguration can be achieved by selectively adding liquid metal inside the containers while ensuring high gain. In the band range of 10.06 GHz - 12 GHz, both S11 and S22 are less than -10 dB, with a peak gain of 17.9 dBi when the antenna is excited by Port 1 and a peak gain of 17.5 dBi when the antenna is excited by Port 2.