SIW-fed Double Layer End-fire Metasurface Antenna Array With Improved Gain

This paper introduces a high gain end-fire 1×8 SIW-fed double layer metasurface antenna array. At first, single layer and double layer end-fire metasurface antenna elements with a bandwidth of 26.1-38.2 GHz are proposed and designed. Then, both the metasurface antennas are integrated with a 1×8 SIW equal power divider to construct a linear array. The characteristics of proposed double layer antenna and its array are thoroughly investigated. The simulated gain of the double layer metasurface array varies from 12 to 18.1 dBi over 28-37 GHz. Compared with the single layer metasurface antenna, the gain enhancement is more than 1.6 dBi. The wide bandwidth and high gain of the proposed 1×8 antenna array make it an excellent candidate for future mm-Wave applications.