Paper Info
Title
Parallel Ring-Line Rat-Race Circuit With Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines
Abstract
In this paper, we consider a parallel ring-line rat-race circuit realized by replacing some parts of the ring-lines with composite right/left-handed transmission lines (CRLH-TLs). For a conventional rat-race circuit, the minimum coupling factor is limited by the highest impedance of the ring-lines that can be manufactured by general printed circuit board (PCB) technologies. However, the coupling factor of the parallel ring-line type rat-race circuit proposed in this paper is determined by the difference between the admittances of the parallel ring-lines. As a result of designing parallel ring-line rat-race circuits having coupling factors of 20 and 30 dB for an operation frequency of 4 GHz, the proposed rat-race circuit realizes broadband characteristics of about 35.5% according to the numerical results for the 20 dB circuit. Furthermore, broadband characteristics including reflection, isolation, and couplings can be maintained for the fabricated 20 dB rat-race circuit up to an input power of 40 dBm.
Year
DOI
Venue
2014
10.1587/transele.E97.C.965
IEICE TRANSACTIONS ON ELECTRONICS
Keywords
Field
DocType
microwave passive components, rat-race circuit, loose coupling, CRLH-TL, wideband
Wideband,Rat race,Loose coupling,Composite number,Electronic engineering,Electric power transmission,Engineering,Electrical engineering
Journal
Volume
Issue
ISSN
E97C
10
1745-1353
Citations 
PageRank 
References 
0
0.34
0
Authors
8
Name
Order
Citations
PageRank
Tadashi Kawai196.84
Yuma Sumitomo200.34
Akira Enokihara332.82
Isao Ohta4107.85
Kei Satoh5263.91
Yasunori Suzuki624.37
Hiroshi Okazaki734.78
Shoichi Narahashi858.14