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http://dx.doi.org/10.5515/KJKIEES.2012.23.7.768

A Branch-Line Hybrid Using Triangle-Patch Type Artificial Transmission Line  

Oh, Song-Yi (Dept. of Electrical and Electronic Engineering, College of Information Technology, Kangwon National University)
Hwang, Hee-Yong (Dept. of Electrical and Electronic Engineering, College of Information Technology, Kangwon National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.23, no.7, 2012 , pp. 768-773 More about this Journal
Abstract
A branch-line hybrid using microstrip artificial transmission lines(ATLs) with slotted-triangular patches is proposed. The proposed artificial transmission line is compact in structure as well as easy to adjust the characteristic impedance and electrical length of equivalent transmission line by changing the slot's parameters; hence, it is useful for miniaturizing conventional transmission lines. The designed branch-line hybrid, because of the use of the right angled isosceles triangular shaped artificial transmission lines as building blocks, has no useless empty space, and hence optimally miniaturized. A fabricated 3 dB branch-line hybrid shows the coupling variation of ${\pm}0.5$ dB and the phase difference between two output ports of $91^{\circ}{\pm}4^{\circ}$ within 15 % bandwidth at 2.45 GHz center frequency. The size of proposed branch-line hybrid is only 38% of the conventional branch-line hybrid.
Keywords
Branch-Line Hybrid; Artificial Transmission Line; ATL; Miniaturization; Microstrip Coupler;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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