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Miniaturize size of dual band branch-line coupler by implementing reduced series arm of coupler with stub loaded

Jizat, N. M. and Abdul Rahim, Sharul Kamal and Abd. Rahman, Tharek and Kamarudin, Muhammad Ramlee (2011) Miniaturize size of dual band branch-line coupler by implementing reduced series arm of coupler with stub loaded. Microwave and Optical Technology Letters, 53 (4). pp. 819-822. ISSN 0895-2477

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Official URL: http://dx.doi.org/10.1002/mop.25869

Abstract

An extremely reduced size branch-line coupler operating at dual frequencies of WLAN band 2.45 GHz and 5.8 GHz is presented which is 58% smaller compared to the conventional design. The technique presented introduces the combination method in which the length of series lines is half than the length of shunt branch lines and the loading of stub tapped to the center of the series branch line that forms the couplers arms. Furthermore, the coupler accurately divides the input signal by two parts with the same power and 90° phase difference. Also, the reflection coefficient and the isolation are as good as conventional one. The agreement of the measurement and simulated confirms the theory and validates the proposed coupler design. The measurement shows 33.83% and 9.22% bandwidth for the lower and upper frequency, respectively.

Item Type:Article
Uncontrolled Keywords:dual band, miniaturize, two level stub
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:29303
Deposited By: Yanti Mohd Shah
Deposited On:07 Mar 2013 01:31
Last Modified:25 Mar 2019 08:06

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