IEICE Electronics Express | |
A quad-band branch line coupler with high frequency ratio | |
article | |
Guoan Wu1  Shihao Qi1  Wenguang Li1  Baoquan Hu2  Lamin Zhan1  | |
[1] School of Optical and Electronic Information, Huazhong University of Science and Technology;Aviation industry Shaanxi Aircraft Industry Group Co., Ltd. | |
关键词: branch line coupler; quad-band; coupled lines; operating frequency ratio; | |
DOI : 10.1587/elex.18.20210487 | |
学科分类:电子、光学、磁材料 | |
来源: Denshi Jouhou Tsuushin Gakkai | |
【 摘 要 】
In this paper, a novel quad-band branch line coupler with high ratio (from 6.27 to 14.96) of the largest operating frequency to the smallest operating frequency is presented. To realize quad-band operations, a combination of coupled lines and open stubs is proposed which can make the design flexible. By using analysis of even and odd modes, the equivalent equations for the quad-band operation are obtained. Compared to the existing quad-band branch line coupler, the proposed quad-band coupler has the highest ratio of the largest operating frequency to the smallest operating frequency, which is valuable for wideband and ultra wideband application. For practical applications, a quad-band coupler operating at 0.7, 1.64, 4.09, and 5.03GHz which can be used for the long term evolution (LTE) and Wi-Fi is designed, fabricated, and measured. The simulated and measured results agree well with the design theory.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO202306290004386ZK.pdf | 13826KB | download |