Design of Quadrature Hybrids and Directional Couplers Based on the Equivalent Admittance Approach

Isao OHTA; Tadashi KAWAI

doi:10.1093/ietele/e88-c.1.2

Design of Quadrature Hybrids and Directional Couplers Based on the Equivalent Admittance Approach

Isao OHTA, Tadashi KAWAI

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This paper presents a design procedure of a directional coupler consisting of a twofold symmetric four-port circuit with four identical matching networks at each port. The intrinsic power-split ratio and the equivalent admittance of the directional coupler are formularized in terms of the eigenadmittances of the original four-port without the matching networks. These formulas are useful for judgment on the realizability of a directional coupler in a given circuit structure and for design of the matching networks. Actually, the present procedure is applied to designing various quadrature hybrids and directional couplers, and its practical usefulness as well as several new circuit structures are demonstrated.

Publication: IEICE TRANSACTIONS on Electronics Vol.E88-C No.1 pp.2-14

Publication Date: 2005/01/01

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DOI: 10.1093/ietele/e88-c.1.2

Type of Manuscript: Special Section INVITED PAPER (Special Section on Recent Trends of Microwave and Millimeter-Wave Passive Circuit Components and Technologies for Improvement of Characteristics)

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Isao OHTA, Tadashi KAWAI, "Design of Quadrature Hybrids and Directional Couplers Based on the Equivalent Admittance Approach" in IEICE TRANSACTIONS on Electronics, vol. E88-C, no. 1, pp. 2-14, January 2005, doi: 10.1093/ietele/e88-c.1.2.
Abstract: This paper presents a design procedure of a directional coupler consisting of a twofold symmetric four-port circuit with four identical matching networks at each port. The intrinsic power-split ratio and the equivalent admittance of the directional coupler are formularized in terms of the eigenadmittances of the original four-port without the matching networks. These formulas are useful for judgment on the realizability of a directional coupler in a given circuit structure and for design of the matching networks. Actually, the present procedure is applied to designing various quadrature hybrids and directional couplers, and its practical usefulness as well as several new circuit structures are demonstrated.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e88-c.1.2/_p

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@ARTICLE{e88-c_1_2,
author={Isao OHTA, Tadashi KAWAI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Design of Quadrature Hybrids and Directional Couplers Based on the Equivalent Admittance Approach},
year={2005},
volume={E88-C},
number={1},
pages={2-14},
abstract={This paper presents a design procedure of a directional coupler consisting of a twofold symmetric four-port circuit with four identical matching networks at each port. The intrinsic power-split ratio and the equivalent admittance of the directional coupler are formularized in terms of the eigenadmittances of the original four-port without the matching networks. These formulas are useful for judgment on the realizability of a directional coupler in a given circuit structure and for design of the matching networks. Actually, the present procedure is applied to designing various quadrature hybrids and directional couplers, and its practical usefulness as well as several new circuit structures are demonstrated.},
keywords={},
doi={10.1093/ietele/e88-c.1.2},
ISSN={},
month={January},}

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TY - JOUR
TI - Design of Quadrature Hybrids and Directional Couplers Based on the Equivalent Admittance Approach
T2 - IEICE TRANSACTIONS on Electronics
SP - 2
EP - 14
AU - Isao OHTA
AU - Tadashi KAWAI
PY - 2005
DO - 10.1093/ietele/e88-c.1.2
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E88-C
IS - 1
JA - IEICE TRANSACTIONS on Electronics
Y1 - January 2005
AB - This paper presents a design procedure of a directional coupler consisting of a twofold symmetric four-port circuit with four identical matching networks at each port. The intrinsic power-split ratio and the equivalent admittance of the directional coupler are formularized in terms of the eigenadmittances of the original four-port without the matching networks. These formulas are useful for judgment on the realizability of a directional coupler in a given circuit structure and for design of the matching networks. Actually, the present procedure is applied to designing various quadrature hybrids and directional couplers, and its practical usefulness as well as several new circuit structures are demonstrated.
ER -