Compact Rat-Race Hybrid Coupler Using Slow Wave and Left-Handed Transmission Lines

Tack-Gyu KIM; Bomson LEE

doi:10.1587/transele.E92.C.1535

Compact Rat-Race Hybrid Coupler Using Slow Wave and Left-Handed Transmission Lines

Tack-Gyu KIM, Bomson LEE

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Based on provided convenient design equations for slow wave transmission lines and metamaterial line, a very compact rat-race hybrid coupler is proposed using three slow wave lines and one metamaterial line. At the design frequency of 2 GHz, the size of the proposed coupler is 2.3 cm2.7 cm, which is a 74% reduction compared with the conventional one. Despite the considerable size reduction, the theoretical bandwidths based on | S₁₁|, | S₃₁|, ∠ S₂₁-∠ S₃₁, and ∠ S₂₄-∠ S₃₄, have been improved by 9%, 7%, 31%, and 59%, respectively. The measured performances are in reasonable agreement with the theoretical ones.

Publication: IEICE TRANSACTIONS on Electronics Vol.E92-C No.12 pp.1535-1537

Publication Date: 2009/12/01

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Online ISSN: 1745-1353

DOI: 10.1587/transele.E92.C.1535

Type of Manuscript: BRIEF PAPER

Category: Microwaves, Millimeter-Waves

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Tack-Gyu KIM, Bomson LEE, "Compact Rat-Race Hybrid Coupler Using Slow Wave and Left-Handed Transmission Lines" in IEICE TRANSACTIONS on Electronics, vol. E92-C, no. 12, pp. 1535-1537, December 2009, doi: 10.1587/transele.E92.C.1535.
Abstract: Based on provided convenient design equations for slow wave transmission lines and metamaterial line, a very compact rat-race hybrid coupler is proposed using three slow wave lines and one metamaterial line. At the design frequency of 2 GHz, the size of the proposed coupler is 2.3 cm2.7 cm, which is a 74% reduction compared with the conventional one. Despite the considerable size reduction, the theoretical bandwidths based on | S₁₁|, | S₃₁|, ∠ S₂₁-∠ S₃₁, and ∠ S₂₄-∠ S₃₄, have been improved by 9%, 7%, 31%, and 59%, respectively. The measured performances are in reasonable agreement with the theoretical ones.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E92.C.1535/_p

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@ARTICLE{e92-c_12_1535,
author={Tack-Gyu KIM, Bomson LEE, },
journal={IEICE TRANSACTIONS on Electronics},
title={Compact Rat-Race Hybrid Coupler Using Slow Wave and Left-Handed Transmission Lines},
year={2009},
volume={E92-C},
number={12},
pages={1535-1537},
abstract={Based on provided convenient design equations for slow wave transmission lines and metamaterial line, a very compact rat-race hybrid coupler is proposed using three slow wave lines and one metamaterial line. At the design frequency of 2 GHz, the size of the proposed coupler is 2.3 cm2.7 cm, which is a 74% reduction compared with the conventional one. Despite the considerable size reduction, the theoretical bandwidths based on | S₁₁|, | S₃₁|, ∠ S₂₁-∠ S₃₁, and ∠ S₂₄-∠ S₃₄, have been improved by 9%, 7%, 31%, and 59%, respectively. The measured performances are in reasonable agreement with the theoretical ones.},
keywords={},
doi={10.1587/transele.E92.C.1535},
ISSN={1745-1353},
month={December},}

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TY - JOUR
TI - Compact Rat-Race Hybrid Coupler Using Slow Wave and Left-Handed Transmission Lines
T2 - IEICE TRANSACTIONS on Electronics
SP - 1535
EP - 1537
AU - Tack-Gyu KIM
AU - Bomson LEE
PY - 2009
DO - 10.1587/transele.E92.C.1535
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E92-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2009
AB - Based on provided convenient design equations for slow wave transmission lines and metamaterial line, a very compact rat-race hybrid coupler is proposed using three slow wave lines and one metamaterial line. At the design frequency of 2 GHz, the size of the proposed coupler is 2.3 cm2.7 cm, which is a 74% reduction compared with the conventional one. Despite the considerable size reduction, the theoretical bandwidths based on | S₁₁|, | S₃₁|, ∠ S₂₁-∠ S₃₁, and ∠ S₂₄-∠ S₃₄, have been improved by 9%, 7%, 31%, and 59%, respectively. The measured performances are in reasonable agreement with the theoretical ones.
ER -