A Wideband High-Gain Multilinear Polarization-Reconfigurable Antenna Integrated With Nonuniform Partially Reflective Surface

In this communication, we develop a wideband and high-gain multilinear polarization-reconfigurable antenna integrated with nonuniform partially reflective surface (PRS). It leverages a compact L-probe feed source with 25.71 degrees interval reconfigurable linear polarizations (LPs). A polarization-independent nonuniform PRS with both reflection magnitude and phase control is introduced to significantly enhance the gain of the feed source. Furthermore, a systematic analysis on antenna gain relative to the PRS size is conducted, and the obtained gain can vary from around 15 to 20 dBi by carefully designing the PRS. Besides, a partial metallic cavity is presented to further improve the peak gain without enlarging the antenna. An example of seven-LP reconfigurable antenna was designed, simulated, and fabricated. The prototype achieves an overlapped -10-dB impedance bandwidth from 9.28 to 11.32 GHz (19.8%) and a maximum gain of 15.08 dBi. The 3-dB gain bandwidth is 15.7% (from 9.4 to 11 GHz). These measured characteristics validate the antenna's good performance in delivering wide bandwidth and high gains across multiple LPs.