Enhancing the Scanning Gain of Phased Array Antenna Using a Holographic Metasurface

被引：2
作者：
Yin, Xiangyu [1 ]
Ren, Wu [1 ]
Xue, Zhenghui [1 ]
Li, Weiming [1 ]
机构：
[1] Beijing Inst Technol, Sch Integrated Circuits & Elect, Beijing Key Lab Millimeter Wave & Terahertz Wave T, Beijing 100081, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2024年 / 23卷 / 02期
关键词：
Holographic metasurface (HM); phased array; scan gain enhancing; SURFACES;
D O I：
10.1109/LAWP.2023.3329142
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Due to the influence of mutual coupling between the antenna elements, the scanning performance of planar phased array antenna deteriorates significantly with the increase of scanning angle, which limits the ability of an antenna to detect targets at low elevation angles. A scan gain enhancing surface (SGES) consisting of a holographic metasurface (HM) and a surface-wave guiding structure (SWGS) is proposed in this letter. HM is loaded at both ends of the phased array, which can convert surface waves into leaky waves and radiate in the specified direction, thereby enhancing the beam gain of the phased array. The SWGS can promote the surface-wave propagation to the HM, thus improving the surface-wave conversion efficiency. An eight-element patch linear array was designed and fabricated to verify the effectiveness of the SGES. The measurement results show that the antenna array loaded with SGES can scan up to +/- 57(degrees) with only 0.4 dB reduction in realized gain. The realized gain can be increased by up to 3.6 dB. Good agreement is obtained between the measurements and the simulations.
引用
收藏
页码：538 / 542
页数：5
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