Investigation on the Wideband Performance of Non-Resonant Partially Reflective Surface Antennas

Conventional resonant partially reflective surface (PRS) antennas suffer from narrow bandwidth and struggle to maintain a pencil-shaped beam at higher frequencies. This paper compares the near-field amplitude and phase characteristics of traditional resonant PRS antennas with non-resonant PRS antennas, explaining why the latter offers superior bandwidth and gain performance. By incorporating dual-frequency compensation phase (DFCP) technique into the non-resonant PRS antenna, the design achieves a 3-dB gain bandwidth of 24%, a peak gain of 20.6 dBi, and an aperture efficiency of 36.5% across the 10–15 GHz range.