National Changhua University of Education Institutional Repository : Item 987654321/10993
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题名: Frequency reconfigurable circularly polarized slot antenna with wide tuning range
作者: Lee, Tsung-Yu;Row, Jeen-Sheen
贡献者: 電機工程學系
关键词: Slot antenna;Circular polarization;Reconfigurable antenna
日期: 2011-07
上传时间: 2012-06-05T02:01:37Z
出版者: Wiley
摘要: Frequency tunable annular-ring slot antennas with circularly polarization (CP) operation are studied in this article. The annular-ring slot antenna operates at one full-wavelength resonant mode and it is excited by an L-shaped coupling strip with a reactive loading. It is found that the operating frequency of the slot antenna can be tuned by varying the capacitance values of four capacitors, which are symmetrically placed along the circumference of the ring slot. Moreover, for each operating frequency in the tunable range, good CP performance can be obtained as long as the reactance of the loading is properly adjusted. Both measured and simulated results indicate the CP operating frequency of the proposed design can be tuned between 1.58 and 2.59 GHz. A prototype integrating with two varactor diodes is also implemented so that the CP operating frequency can be switched by controlling dc biases. Details of the antenna designs and measured results are presented and discussed.
關聯: Microwave and Optical Technology Letters, 53(7): 1501-1505
显示于类别:[電機工程學系] 期刊論文

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