Optimum Design of Broadband Multisection Coupled-Line Couplers with Arbitrary Coupling and Impedance Matching

Homayoon ORAIZI; Gholam-Reza GABARANZAD GHADIM

Optimum Design of Broadband Multisection Coupled-Line Couplers with Arbitrary Coupling and Impedance Matching

Homayoon ORAIZI, Gholam-Reza GABARANZAD GHADIM

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In this paper the method of least squares is employed to design an axially symmetric contradirectional multisection coupled - line coupler together with the impedance matching of real generator and load impedances. An error function is constructed for the required coupling (C) based on the squared magnitude of the ratio of the coupler voltage to that at the incident port. Another algorithm based on the reflected and transmitted wave amplitudes is developed by the method of least squares for the design of a coupled - line coupler with impedance matching of different input and output complex impedances and arbitrary coupling and length. The error functions are minimized to determine the coupler geometry, namely the normalized strip conductor widths (u=w/h) and separation (g=s/h) and the coupler length, where h is the substrate thickness. A procedure is presented to provide the initial values of u and g. The computer implementation of the proposed method shows that a proper coupler design is possible for any given coupler length. This is particularly interesting where space limitations impose contraints on the coupler length. The results are favorably compared with available computer simulation softwares.

Publication: IEICE TRANSACTIONS on Communications Vol.E86-B No.9 pp.2709-2719

Publication Date: 2003/09/01

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Type of Manuscript: PAPER

Category: Antennas and Propagation

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Homayoon ORAIZI, Gholam-Reza GABARANZAD GHADIM, "Optimum Design of Broadband Multisection Coupled-Line Couplers with Arbitrary Coupling and Impedance Matching" in IEICE TRANSACTIONS on Communications, vol. E86-B, no. 9, pp. 2709-2719, September 2003, doi: .
Abstract: In this paper the method of least squares is employed to design an axially symmetric contradirectional multisection coupled - line coupler together with the impedance matching of real generator and load impedances. An error function is constructed for the required coupling (C) based on the squared magnitude of the ratio of the coupler voltage to that at the incident port. Another algorithm based on the reflected and transmitted wave amplitudes is developed by the method of least squares for the design of a coupled - line coupler with impedance matching of different input and output complex impedances and arbitrary coupling and length. The error functions are minimized to determine the coupler geometry, namely the normalized strip conductor widths (u=w/h) and separation (g=s/h) and the coupler length, where h is the substrate thickness. A procedure is presented to provide the initial values of u and g. The computer implementation of the proposed method shows that a proper coupler design is possible for any given coupler length. This is particularly interesting where space limitations impose contraints on the coupler length. The results are favorably compared with available computer simulation softwares.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e86-b_9_2709/_p

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@ARTICLE{e86-b_9_2709,
author={Homayoon ORAIZI, Gholam-Reza GABARANZAD GHADIM, },
journal={IEICE TRANSACTIONS on Communications},
title={Optimum Design of Broadband Multisection Coupled-Line Couplers with Arbitrary Coupling and Impedance Matching},
year={2003},
volume={E86-B},
number={9},
pages={2709-2719},
abstract={In this paper the method of least squares is employed to design an axially symmetric contradirectional multisection coupled - line coupler together with the impedance matching of real generator and load impedances. An error function is constructed for the required coupling (C) based on the squared magnitude of the ratio of the coupler voltage to that at the incident port. Another algorithm based on the reflected and transmitted wave amplitudes is developed by the method of least squares for the design of a coupled - line coupler with impedance matching of different input and output complex impedances and arbitrary coupling and length. The error functions are minimized to determine the coupler geometry, namely the normalized strip conductor widths (u=w/h) and separation (g=s/h) and the coupler length, where h is the substrate thickness. A procedure is presented to provide the initial values of u and g. The computer implementation of the proposed method shows that a proper coupler design is possible for any given coupler length. This is particularly interesting where space limitations impose contraints on the coupler length. The results are favorably compared with available computer simulation softwares.},
keywords={},
doi={},
ISSN={},
month={September},}

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TY - JOUR
TI - Optimum Design of Broadband Multisection Coupled-Line Couplers with Arbitrary Coupling and Impedance Matching
T2 - IEICE TRANSACTIONS on Communications
SP - 2709
EP - 2719
AU - Homayoon ORAIZI
AU - Gholam-Reza GABARANZAD GHADIM
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E86-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2003
AB - In this paper the method of least squares is employed to design an axially symmetric contradirectional multisection coupled - line coupler together with the impedance matching of real generator and load impedances. An error function is constructed for the required coupling (C) based on the squared magnitude of the ratio of the coupler voltage to that at the incident port. Another algorithm based on the reflected and transmitted wave amplitudes is developed by the method of least squares for the design of a coupled - line coupler with impedance matching of different input and output complex impedances and arbitrary coupling and length. The error functions are minimized to determine the coupler geometry, namely the normalized strip conductor widths (u=w/h) and separation (g=s/h) and the coupler length, where h is the substrate thickness. A procedure is presented to provide the initial values of u and g. The computer implementation of the proposed method shows that a proper coupler design is possible for any given coupler length. This is particularly interesting where space limitations impose contraints on the coupler length. The results are favorably compared with available computer simulation softwares.
ER -