A Frequency-Agile Compact Array With a Reconfigurable Decoupling and Matching Network

被引：8
作者：
Cai, Yong [1 ]
Guo, Y. Jay [1 ]
机构：
[1] CSIRO ICT Ctr, Epping, NSW 1710, Australia
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2011年 / 10卷
关键词：
Decoupling and matching network; mutual coupling; p-i-n diodes; reconfigurable antenna; SIGNAL CORRELATION; ANTENNA DIVERSITY;
D O I：
10.1109/LAWP.2011.2168937
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 new frequency-agile compact antenna array incorporating a reconfigurable decoupling and matching network (DMN) is presented. The array consists of two printed monopole antennas, each loaded with a p-i-n diode. By changing the p-i-n diode states through an inductive biasing line, the array operating frequency can be tuned to the 2.5- or 3.5-GHz band. The array interelement spacing is chosen to be as small as at 2.5 GHz, which results in a strong mutual coupling between antenna ports. A reconfigurable DMN is proposed to reduce the mutual coupling when the array frequency is switched. Measured results show that the use of the DMN realizes a matched (S-11 <= -10 dB) and decoupled (S-21 <= -20 dB) bandwidth of 150 and 160 MHz in the lower and higher bands, respectively. In addition, compared to the strongly coupled array, at least 9% antenna total efficiency improvement is measured over a 125-MHz bandwidth in both the lower and the higher bands. The effect of the ohmic loss in the DMN on the antenna correlation is also investigated.
引用
收藏
页码：1031 / 1034
页数：4
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