Dual-Band Circularly Polarized Rotated Patch Antenna With a Parasitic Circular Patch Loading

被引：59
作者：
Deng, Changjiang [1 ]
Li, Yue [1 ]
Zhang, Zhijun [1 ]
Pan, Guoping [1 ]
Feng, Zhenghe [1 ]
机构：
[1] Tsinghua Univ, Tsinghua Natl Lab Informat Sci & Technol, State Key Lab Microwave & Digital Commun, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2013年 / 12卷
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Circular polarization; microstrip antenna; multi-frequency antenna;
D O I：
10.1109/LAWP.2013.2254696
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 dual-band circularly polarized (CP) rotated patch antenna is proposed in this letter. Dual-band CP operation of the proposed antenna is achieved by adopting a circular patch below the rotated rectangular patch. The extra circular patch not only provides a higher band, but is also employed to tune the operating frequency of the lower band, which is generated by the rotated rectangular patch. The rectangular patch and the circular patch can be arranged on the front and back of a thin substrate and fed by a single slot. The dual CP operating bands can be tuned separately with a small frequency ratio of 1.18. A prototype of the proposed antenna is built to validate the design strategy. The measured 3-dB axial-ratio (AR) bandwidth is 2.1% (2.238-2.285 GHz) for the lower band and 2.0% (2.645-2.695 GHz) for the higher band, with the reflection coefficient being lower than -10 dB. The radiation pattern and gain are also measured and compared to the simulated ones.
引用
收藏
页码：492 / 495
页数：4
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