A circularly polarized frequency-reconfigurable water antenna with high radiation efficiency is proposed based on the design concept of combining a frequency-reconfigurable radiating structure with a frequency-independent feeding structure. In this letter, a resonator made of distilled water and an Archimedean spiral slot are employed as the radiating and feeding structures, respectively. The operating frequency of the antenna can be continuously tuned over a very wide range while maintaining good impendence matching and circular polarization by changing the dimensions of the water resonator. A prototype antenna is designed, fabricated, and measured. Simulated and measured results demonstrate that the designed antenna exhibits a wide tuning frequency range from 155 MHz to 400 MHz with an average radiation efficiency of about 90% and good circular polarization.
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4 January 2016
Research Article|
January 06 2016
Frequency-reconfigurable water antenna of circular polarization
Meng Zou;
Meng Zou
1Department of Microwave Engineering,
University of Electronic Science and Technology of China
, Chengdu 611731, China
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Zhongxiang Shen;
Zhongxiang Shen
a)
2School of Electrical and Electronic Engineering,
Nanyang Technological University
, 50 Nanyang Avenue, Singapore
639798
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Jin Pan
Jin Pan
1Department of Microwave Engineering,
University of Electronic Science and Technology of China
, Chengdu 611731, China
Search for other works by this author on:
Meng Zou
1
Zhongxiang Shen
2,a)
Jin Pan
1
1Department of Microwave Engineering,
University of Electronic Science and Technology of China
, Chengdu 611731, China
2School of Electrical and Electronic Engineering,
Nanyang Technological University
, 50 Nanyang Avenue, Singapore
639798a)
Electronic mail: [email protected]
Appl. Phys. Lett. 108, 014102 (2016)
Article history
Received:
October 22 2015
Accepted:
December 21 2015
Citation
Meng Zou, Zhongxiang Shen, Jin Pan; Frequency-reconfigurable water antenna of circular polarization. Appl. Phys. Lett. 4 January 2016; 108 (1): 014102. https://doi.org/10.1063/1.4939455
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