Vol. 95

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2020-08-15

Design and Analysis of a Stub-Less Capacitive Loaded Branch Line Coupler with Improved Bandwidth Performance

By Muquaddar Ali, Kamalesh Kumar Sharma, and Rajendra Prasad Yadav
Progress In Electromagnetics Research M, Vol. 95, 105-114, 2020
doi:10.2528/PIERM20062704

Abstract

In this paper, a novel branch line coupler with improved bandwidth and reduced size is presented. The size reduction is achieved by means of capacitive loading. The capacitive loaded transmission line implemented in the proposed design eliminates the need of open stubs. The mechanism of size reduction and bandwidth enhancement of the coupler is discussed analytically with the help of its equivalent circuit. A prototype is fabricated and tested to validate the concept. The measured fractional bandwidth is 40%, ranging from 2.8 GHz to 4.2 GHz which is suitable for 5G systems. Moreover, the obtained phase imbalance between the output ports is less than ±5° for the entire operating range.

Citation


Muquaddar Ali, Kamalesh Kumar Sharma, and Rajendra Prasad Yadav, "Design and Analysis of a Stub-Less Capacitive Loaded Branch Line Coupler with Improved Bandwidth Performance," Progress In Electromagnetics Research M, Vol. 95, 105-114, 2020.
doi:10.2528/PIERM20062704
http://www.jpier.org/PIERM/pier.php?paper=20062704

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