期刊
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
卷 98, 期 -, 页码 235-240出版社
ELSEVIER GMBH
DOI: 10.1016/j.aeue.2018.11.022
关键词
BeiDou navigation satellite system (BDS); Coupled shorting strip; Capacitive probe feed; Circular polarization (CP); Miniaturized patch antenna
资金
- China Postdoctoral Science Foundation [2018M631161]
- Postdoctoral Science Foundation of Shaanxi Province, China [2017BSHYDZZ14]
- Fundamental Research Funds for the Central Universities [XJTU1191329860]
- Natural Science Foundation of Shaanxi Province, China [2018JQ6081]
- Technology Program of Shenzhen [JCYJ20170816100722642]
- Shaanxi Provincial Key Research and Development Plan of China [2017ZDXM-GY-009]
This paper proposes a single-feed miniaturized circularly polarized (CP) patch antenna aimed to cover Chinese BeiDou navigation satellite system (BDS) B3 band (1268.52 +/- 10.23 MHz). Four unbalanced circular patches as perturbation elements are loaded onto corners of a square patch radiator to ensure CP property. To simultaneously realize miniature size and adequate CP bandwidth, each circular patch is coupled to an L-shaped shorting strip consisting of a horizontal arc-shaped strip connected to the ground plane through a vertical shorting pin. In addition, a capacitive probe feed fulfilled by embedding an annular gap is used to compensate large probe inductance due to thick substrate, and therefore good impedance matching can be obtained. The antenna occupies an overall size of lambda(0)/8 x lambda(0)/8 x lambda(0)/13.6, where lambda(0) denotes the free space wavelength at 1268 MHz. Experimental results show that it achieves a 10-dB return loss impedance bandwidth of 75 MHz (1237-1312 MHz) and a 3-dB axial ratio (AR) bandwidth of 31 MHz (1253-1284 MHz). The measured 3-dB AR beamwidth and CP gain are above 170 and 4.0 dBic, respectively, across the entire BDS B3 band. (C) 2018 Elsevier GmbH. All rights reserved.
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