Broadbeam Cross-Dipole Antenna for GPS Applications

被引：49
作者：
Sun, Yu-Xiang [1 ,2 ]
Leung, Kwok Wa [1 ,2 ]
Lu, Kai [1 ,2 ,3 ]
机构：
[1] City Univ Hong Kong, State Key Lab Millimeter Waves, Hong Kong, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China
[3] Antenna Co, NL-5656 AE Eindhoven, Netherlands
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2017年 / 65卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Circular polarization; cross-dipole antenna; global positioning system (GPS) antenna; wide beamwidth; QUADRIFILAR HELICAL ANTENNA; WIDE BEAMWIDTH; BAND; MULTIBAND; PATTERN; MULTIPATH; DESIGN;
D O I：
10.1109/TAP.2017.2742585
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：
A broadbeam cross-dipole antenna with improved lowelevation gain for global positioning system (GPS) applications is reported. The cross-dipole consists of two perpendicular dipoles, which are printed on two separate substrates that are vertically placed inside a cylindrical back cavity. Circularly polarized fields are generated by applying two quadrature signals with equal amplitude to the dipoles. To enhance the low-elevation gain, circular dipoles, curved ground planes, and corrugated back cavity are deployed in our design. A prototype operating in GPS L1 band (1.575 GHz) was designed with ANSYS HFSS, and measurement was done to verify the simulations. The reflection coefficient, axial ratio (AR), radiation pattern, antenna gain, and antenna efficiency are studied. It is found that the antenna has a wide 3 dB AR beamwidth of over 230 degrees and a 3 dB gain beamwidth of 150 degrees. The measured and simulated antenna gains at. = 85 degrees are 0.11 and 0.68 dBic, respectively, which are higher than those of existing designs.
引用
收藏
页码：5605 / 5610
页数：6
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