A Kind of Beam-Scanning Antenna With Amplitude and Phase Control Based on SIW

In recent years, the leaky wave antenna belongs to a kind of beam scanning antenna, which has good beam scanning ability and has been fully developed. However, it is difficult to realize fixed-frequency beam scanning in most leaky antennas, and few structures can control the amplitude and phase of electromagnetic wave simultaneously, which reduces the gain of leaky antennas and raises the sidelobe level. In this paper, a novel metasurface structure is designed and combined with SIW to achieve simultaneous amplitude and phase control, and the radiation efficiency of the unit reaches 30% when working between 7.3-7.7GHz, and the S11 is below -14dB. Finally, the genetic algorithm (GA) was selected as the control algorithm of the array factor to optimize the array and carry out simulation verification. The array has more than ±45° beam scanning capability over the operating bandwidth, with stable Y-polarization gain and sidelobe average is less than -10 dB.