期刊
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
卷 18, 期 6, 页码 1208-1212出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2019.2912624
关键词
Circular polarization; metasurface (MS); Q-band; sequential rotation (SR); substrate integrated waveguide (SIW); wideband
资金
- National Natural Science Foundation of China [61671149, 61701110, 61861136002]
In this letter, a metasurface (MS)-based multilayer wideband circularly polarized (CP) 4 x 4 truncated corner patch antenna array is proposed for Q-band applications. The patch array consists of four 2 x 2 patch subarrays, an MS structure, and an H-shaped substrate integrated waveguide power divider. Each 2 x 2 patch subarray acts as the CP radiating element, which is fed by a compact parallel-fed microstrip power divider using a sequential rotation technology. The MS structure has 4 x 4 square plates covering over each patch to improve |S-11|, axial ratio (AR), and gain performances. The antenna was fabricated and measured to verify the practical feasibility. -10 dB | S-11| bandwidth of 32% (37.4-52.2 GHz), 3 dB AR bandwidth of 25.8% (39.2-51.5 GHz), 3 dB gain bandwidth of 27.6%, and the peak gain of 18.2 dBic are achieved in the vicinity of 45 GHz.
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