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.