Design of dual‐band −3 dB couplers with a wide range of dual‐band frequency ratios. Issue 14 (1st July 2016)

• Record Type: Journal Article
• Authors: Chang, Chih‐Chun; Chin, Kuo‐Sheng; Zheng, Yu‐Feng
• Is Part Of: Electronics letters. Volume 52:Issue 14(2016)
• Page Start: 1231
• Page End: 1233
• Publication Date: 2016-07-01
• Subjects: waveguide couplers -- coupled transmission lines; dual‐band couplers -- dual‐band frequency ratios -- coupled‐line sections; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2016.1340
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A novel topology for designing dual‐band couplers with −3 dB coupling and a wide range of dual‐band frequency ratios is presented. The proposed structure consists of two coupled‐line sections connected by two uncoupled lines and four tapped stubs. This coupler can achieve a high frequency ratio of up to 5 by adjusting the impedance of tapped stubs. An experiment coupler operating at 0.7/2.6 GHz with a frequency ratio of 3.71 and −3 dB coupling was fabricated for demonstration.