A New Broadband Marchand Balun Using Slot-Coupled Microstrip Lines

被引：52
|
作者：
Tseng, Chao-Hsiung [1 ]
Hsiao, Yu-Chih [1 ]
机构：
[1] Natl Taiwan Univ Sci & Technol, Dept Elect Engn, Taipei 106, Taiwan
来源：
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2010年 / 20卷 / 03期
关键词：
Coupled circuits; Marchand balun; planar balun design; slot-coupled microstrip line; DIRECTIONAL-COUPLERS; DESIGN;
D O I：
10.1109/LMWC.2010.2040216
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：
In this letter, a new broadband Marchand balun is proposed using slot-coupled microstrip lines. The developed balun is connected by two sections of diamond-shape slot-coupled microstrips with short- and open-circuited terminations at specified ports. To achieve the broadband operation, the simple formulas have been derived to convert the conventional rectangular-shape slot-coupled microstrip to the diamond-shape counterpart. The measured results of the developed balun not only agree with the full-wave simulation results very well, but also resemble the calculated results by ideal coupled lines. The new Marchand balun developed in this letter has a 10 dB return loss bandwidth of 90%, while in this frequency range the amplitude imbalance varies from -0.37 dB to 0.32 dB, and the phase difference in the range of -180.4 degrees similar to -181.8 degrees.
引用
收藏
页码：157 / 159
页数：3
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