A novel approach to the design and implementation of dual-band compact planar 90° branch-line coupler

被引:234
作者
Cheng, KKM [1 ]
Wong, FL [1 ]
机构
[1] Chinese Univ Hong Kong, Dept Elect Engn, Shatin, Hong Kong, Peoples R China
关键词
couplers; dual band; planar circuits;
D O I
10.1109/TMTT.2004.837151
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 presents the design of a novel branch-line coupler that can operate at two arbitrary frequencies. The proposed circuit also features compact size and planar structure. Explicit design formulas of the proposed dual-band coupler are analytically derived. Moreover, practical issues such as the realization of branch-line impedance and optimum choice of circuit topologies are addressed. For verification purposes, both simulated and measured results of a microstrip branch-line coupler operating at 900/2000 MHz are included.
引用
收藏
页码:2458 / 2463
页数:6
相关论文
共 7 条
[1]  
AVITABILE G, 1997, IEEE MTT S INT MICR, V1, P281
[2]   Design of lumped element quadrature hybrid [J].
Chiang, YC ;
Chen, CY .
ELECTRONICS LETTERS, 1998, 34 (05) :465-467
[3]   Compact planar microstripline branch-line and rat-race couplers [J].
Eccleston, KW ;
Ong, SHM .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2003, 51 (10) :2119-2125
[4]   BROAD-BAND UNIPLANAR HYBRID-RING AND BRANCH-LINE COUPLERS [J].
HO, CH ;
FAN, L ;
CHANG, K .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1993, 41 (12) :2116-2125
[5]  
MEANY P, 1990, IEEE MTT S INT MICR, V1, P585
[6]   ANALYSIS AND DESIGN OF LUMPED-ELEMENT AND LUMPED-DISTRIBUTED-ELEMENT DIRECTIONAL-COUPLERS FOR MIC AND MMIC APPLICATIONS [J].
VOGEL, RW .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1992, 40 (02) :253-262
[7]  
Wong F. L., 2004, IEEE MTT S INT MICR, P903