Publisher : The Korean Institute of Electromagnetic Engineering and Science
DOI : 10.5515/KJKIEES.2015.26.11.960
Title & Authors
Coupled-Line Directional Coupler Using Artificial Transmission Line Sim, Kyung-Sub; Hwang, Hee-Yong;
In this paper, a coupled line directional coupler using an LUC(Low-pass filter Unit Cell) of artificial transmission line is presented. The conventional coupled line coupler is limited in length by the transmission line while the proposed coupling structure is implemented smaller than by inserting the phase delay line between two coupled line, reduced in physical size by configuring a phase delay line with an LUC having the characteristics of a typical transmission line in a particular frequency. A coupler having -10 dB coupling factor at the center frequency of 700 MHz is designed, fabricated. The measured result agrees well with that of conventional one. The length of the fabricated coupled line coupler has about 45 % in length compared to the conventional one.
Coupled Line Directional Coupler;Artificial Transmission Line;Low-Pass Filter Unit Cell;Miniaturized Coupler;
D. M. Pozar, Microwave Engineering, 4 th Edition, John Wiley & Sons, pp. 399-415, Sep. 2012.
Twyh-Ghuang Ma, Yu-Ting Cheng, "A miniaturized multilayered marchand balun using coupled artificial treasmission lines", IEEE. Microwave and Wireless Components Letters, vol. 19, no. 7, pp. 446-448, Jul. 2009.
Kook Hyun Chang, Kyung Min Nam, and Jeong Phill Kim, "Design of various compact branch-line couplers by using artificial transmission lines", IEEE MTT-S International, pp. 1726-1729, 2006.
고민수, "700 MHz 대역 주파수 이용관계를 둘러싼 쟁점에 대한 비판적 재고찰", 한국비교공법학회지, 15(4), 2014년 11월.
Won-Kyun Lee, Hee-Yong Hwang, "Size and harmonic reduced Wilkinson balun using parallel coupled line with open stub", JEES, vol. 14, no. 4, pp. 387-392, Dec. 2014.
Rui Li, Ding Il Kim, "A new compact low-pass filter with broad stopband and sharp skirt sharacteristics", IEEE AMPC 2005 Proceeding, vol. 3, no. 1, pp. 607-601.
오송이, 황희용, "슬롯을 가진 삼각 패치형 인공 전송 선로 결합기", 한국전자파학회논문지, 22(5), pp. 510-515, 2011년 5월.