A quad-band branch line coupler with high frequency ratio

IEICE Electronics Express

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