Center-fed high-gain planar phase-reversal antenna array with enhanced radiation bandwidth for millimeter-wave applications

Simulated return loss and radiation patterns are shown in Fig. 5. The antenna is well-matched around center frequency of 24 GHz. The gain at 24 GHz is 10 dBi. At frequencies other than 24 GHz, the maximum beam almost keeps constant at the broadside. This result proves that the beam bandwidth of the antenna is improved and the beam squinting problem is suppressed by the proposed center feed structure.