期刊
FRONTIERS IN PHYSICS
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2022.983951
关键词
polarization-sensitive; linear-to-circular polarization (LP-CP) converter; circular polarization; folded reflectarray antenna (FRA); low-profile
资金
- Backbone Teachers Program [10912-JXGG2021-06751]
- National Natural Science Foundation of China [62101271, 62171289]
- Major Key Project of the PCL [PCL2021A15]
- Shenzhen Science and Technology Programs [JCYJ20190808145411289]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515111166]
- Natural Science Foundation of Jiangsu Province for Youth [BK20210557]
- Shenzhen Science and Technology Innovation Commission under the Shenzhen Fundamental Research Program [JCYJ20190808115411853]
- [SWPTJG2102]
This study proposes a low-profile circularly polarized folded reflectarray antenna (CPFRA) that minimizes the antenna profile by utilizing a polarization-sensitive LP-CP converter. Both simulation and measurement results demonstrate that the proposed CPFRA offers higher gain and a lower profile compared to its traditional counterparts.
This work proposes a low-profile circularly polarized folded reflectarray antenna (CPFRA). Compared to traditional CPFRA that comprise the main reflectarray, a polarization grid (PG), and a linear-to-circular polarization (LP-CP) converter, the proposed CPFRA utilizes a polarization-sensitive LP-CP converter that plays the roles of both PG and LP-CP converter to minimize the CPFRA profile. One period of the polarization-sensitive LP-CP converter consists of an LP and a CP patch on the bottom and top layer of the substrates, respectively, which are connected by a metalized via. Due to its frequency-selective characteristic, the polarization-sensitive LP-CP surface can simultaneously reflect the x-polarized waves and transfer the received y-polarized waves into the CP state. A 1-bit unit cell at the bottom layer is adopted for polarization conversion and phase shift. A planar patch antenna is integrated as the primary feeding source. A high-gain circularly polarized folded reflectarray antenna at the X-band is designed, fabricated, and measured. Both simulated and measured results demonstrate the advantages of high gain and a lower profile of the proposed CPFRA compared to those in its traditional counterparts.
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