Balanced quad-band diplexer with wide common-mode suppression and high differential-mode isolation

被引：24
|
作者：
Lee, Ching-Her [1 ]
Hsu, Chung-I Gavin [2 ]
Wu, Shang-Xing [1 ]
Wen, Pi-Hung [1 ]
机构：
[1] Natl Changhua Univ Educ, Grad Inst Commun Engn, Dept Elect Engn, Changhua 500, Taiwan
[2] Natl Yunlin Univ Sci & Technol, Dept Elect Engn, Yunlin 640, Taiwan
来源：
IET MICROWAVES ANTENNAS & PROPAGATION | 2016年 / 10卷 / 06期
关键词：
HIGH SELECTIVITY; DESIGN; COMPACT;
D O I：
10.1049/iet-map.2015.0538
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 balanced quad-band diplexer is proposed with wide common-mode (CM) suppression and high differential-mode (DM) isolation in this study. The six-port balanced diplexer was formed by combining two dual-band bandpass filters operating at 1.92/5.25 and 2.45/5.8 GHz through two stepped-impedance resonator (SIR) inserted T-junctions. By carefully designing the section length of the T-junction and the SIR length from its open-end to the joint-point with the T-junction, high isolation between diplexer channels can be attained. A prototype of the proposed balanced quad-band diplexer was implemented and measured with a DM isolation of higher than 51.8 dB and a CM suppression of larger than 47.9 dB in the four DM passbands. Good agreement was observed between the simulated and the measured results.
引用
收藏
页码：599 / 603
页数：5
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