IEICE TRANSACTIONS on Electronics
Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines
Summary :
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.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E97-C No.10 pp.965-971
- Publication Date
- 2014/10/01
- Publicized
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.E97.C.965
- Type of Manuscript
- Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-wave Technologies)
- Category
Authors
Tadashi KAWAI
University of Hyogo
Yuma SUMITOMO
University of Hyogo
Akira ENOKIHARA
University of Hyogo
Isao OHTA
University of Hyogo
Kei SATOH
NTT DOCOMO, INC.
Yasunori SUZUKI
NTT DOCOMO, INC.
Hiroshi OKAZAKI
NTT DOCOMO, INC.
Shoichi NARAHASHI
NTT DOCOMO, INC.
Keyword
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Tadashi KAWAI, Yuma SUMITOMO, Akira ENOKIHARA, Isao OHTA, Kei SATOH, Yasunori SUZUKI, Hiroshi OKAZAKI, Shoichi NARAHASHI, "Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines" in IEICE TRANSACTIONS on Electronics,
vol. E97-C, no. 10, pp. 965-971, October 2014, doi: 10.1587/transele.E97.C.965.
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.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E97.C.965/_p
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@ARTICLE{e97-c_10_965,
author={Tadashi KAWAI, Yuma SUMITOMO, Akira ENOKIHARA, Isao OHTA, Kei SATOH, Yasunori SUZUKI, Hiroshi OKAZAKI, Shoichi NARAHASHI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines},
year={2014},
volume={E97-C},
number={10},
pages={965-971},
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.},
keywords={},
doi={10.1587/transele.E97.C.965},
ISSN={1745-1353},
month={October},}
Copy
TY - JOUR
TI - Parallel Ring-Line Rat-Race Circuit with Very Loose Coupling Utilizing Composite Right-/Left-Handed Transmission Lines
T2 - IEICE TRANSACTIONS on Electronics
SP - 965
EP - 971
AU - Tadashi KAWAI
AU - Yuma SUMITOMO
AU - Akira ENOKIHARA
AU - Isao OHTA
AU - Kei SATOH
AU - Yasunori SUZUKI
AU - Hiroshi OKAZAKI
AU - Shoichi NARAHASHI
PY - 2014
DO - 10.1587/transele.E97.C.965
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E97-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 2014
AB - 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.
ER -
English
