Analysis and Design of a Differentially-Fed Frequency Agile Microstrip Patch Antenna

被引:61
作者
Hum, Sean Victor [1 ]
Xiong, Hui Yuan [1 ]
机构
[1] Univ Toronto, Edward S Rogers Sr Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Frequency agile antennas; microstrip antennas; multifrequency antennas; reconfigurable antennas; varactors; COMPACT; PIFA; LINES;
D O I
10.1109/TAP.2010.2055805
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
The design of a frequency agile microstrip patch antenna is described that is readily interfaced with differential RF transceivers. By integrating three pairs of varactor diodes with the patch antenna, and tuning them in unison, frequency tuning ratios approaching 2 are possible with the design. This is made possible by the intrinsically broadband nature of the differential feeding scheme used. An intuitive equivalent circuit for predicting the port characteristics of the antenna is presented. Moreover, the circuit is shown to be highly accurate in predicting losses produced by the varactor diodes and the consequent radiation efficiency of the antenna. To the best of the authors' knowledge, this is the first time a detailed analysis of the effect of varactor diode losses has been undertaken in frequency agile antennas using an equivalent circuit. The equivalent circuit model is subsequently validated using full-wave simulations and experimental measurements of an antenna operating in the 2-4 GHz range.
引用
收藏
页码:3122 / 3130
页数:9
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