Band-Broadening Design Technique of CRLH-TLs Dual-Band Branch-Line Couplers Using CRLH-TLs Matching Networks

被引：1

作者：

Kawai, Tadashi ^{[1
]}

Nakamura, Miku ^{[1
]}

Ohta, Isao ^{[1
]}

Enokihara, Akira ^{[1
]}

机构：

[1] Univ Hyogo, Grad Sch Engn, Dept Elect Engn & Comp Sci, Himeji, Hyogo 6712280, Japan

来源：

IEICE TRANSACTIONS ON ELECTRONICS | 2010年 / E93C卷 / 07期

关键词：

branch-line coupler; matching network; CRLH-TL; dual-band; equivalent admittance approach; size reduction;

D O I：

10.1587/transele.E93.C.1072

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：

This paper treats a band-broadening design technique of a dual-band branch-line coupler with matching networks composed of an impedance step and a short-circuited stub based on the equivalent admittance approach. By replacing each right-handed transmission line (RH-TL) with a composite right/left-handed transmission line (CRLH-TL), very flat couplings over a relative bandwidth of about 10% can be obtained at two arbitrary operating frequencies in comparison with previous CRLH-TLs branch-line couplers. Furthermore, by adding periodical open-circuited stubs into RH-TLs of the designed CRLH-TLs branch-line coupler with matching networks, the entire size of the coupler can be reduced to about 50%. Verification of these band-broadening and size-reduction design techniques can be also shown by an electromagnetic simulation and experiment.

引用

页码：1072 / 1077

页数：6

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