Cavity model of circularly polarised cross-aperture-coupled microstrip antenna

B. Al-Jibouri; H. Evans; E. Korolkiewicz; E. G. Lim; A. Sambell; T. Viasits

doi:10.1049/ip-map:20010498

Cavity model of circularly polarised cross-aperture-coupled microstrip antenna

B. Al-Jibouri, H. Evans, E. Korolkiewicz, E. G. Lim, A. Sambell, T. Viasits

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

A cavity model is used to analyse an aperture-fed nearly square circularly polarised patch antenna. The form of the aperture is that of a symmetric cross-slot that couples the excitation between a single microstrip feed line and the patch antenna. Using equivalent magnetic current sources at the slots, the modal electric and magnetic fields under the patch are obtained, and hence analytical expressions for the patch admittances at the aperture are derived and used to obtain an equivalent circuit of the circular polarised antenna. Good agreement is obtained between the circuit modelling and practical results.

Original language	English
Pages (from-to)	147-152
Number of pages	6
Journal	IEE Proceedings: Microwaves, Antennas and Propagation
Volume	148
Issue number	3
DOIs	https://doi.org/10.1049/ip-map:20010498
Publication status	Published - 1 Jun 2001
Externally published	Yes

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abstract = "A cavity model is used to analyse an aperture-fed nearly square circularly polarised patch antenna. The form of the aperture is that of a symmetric cross-slot that couples the excitation between a single microstrip feed line and the patch antenna. Using equivalent magnetic current sources at the slots, the modal electric and magnetic fields under the patch are obtained, and hence analytical expressions for the patch admittances at the aperture are derived and used to obtain an equivalent circuit of the circular polarised antenna. Good agreement is obtained between the circuit modelling and practical results.",

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AU - Al-Jibouri, B.

AU - Evans, H.

AU - Korolkiewicz, E.

AU - Lim, E. G.

AU - Sambell, A.

AU - Viasits, T.

PY - 2001/6/1

Y1 - 2001/6/1

N2 - A cavity model is used to analyse an aperture-fed nearly square circularly polarised patch antenna. The form of the aperture is that of a symmetric cross-slot that couples the excitation between a single microstrip feed line and the patch antenna. Using equivalent magnetic current sources at the slots, the modal electric and magnetic fields under the patch are obtained, and hence analytical expressions for the patch admittances at the aperture are derived and used to obtain an equivalent circuit of the circular polarised antenna. Good agreement is obtained between the circuit modelling and practical results.

AB - A cavity model is used to analyse an aperture-fed nearly square circularly polarised patch antenna. The form of the aperture is that of a symmetric cross-slot that couples the excitation between a single microstrip feed line and the patch antenna. Using equivalent magnetic current sources at the slots, the modal electric and magnetic fields under the patch are obtained, and hence analytical expressions for the patch admittances at the aperture are derived and used to obtain an equivalent circuit of the circular polarised antenna. Good agreement is obtained between the circuit modelling and practical results.

KW - Microstrip antennas

KW - Antenna theory

KW - Electric admittance

KW - Equivalent circuits

KW - Electric impedance

KW - Electromagnetic wave polarisation

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JO - IEE Proceedings: Microwaves, Antennas and Propagation

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SN - 1350-2417

IS - 3

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Cavity model of circularly polarised cross-aperture-coupled microstrip antenna

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