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Article: Analysis of a probe-fed microstrip disk antenna

TitleAnalysis of a probe-fed microstrip disk antenna
Authors
Issue Date1991
Citation
Iee Proceedings H: Microwaves, Antennas And Propagation, 1991, v. 138 n. 2, p. 185-191 How to Cite?
AbstractThe input impedance of a probe-fed, annular-ring-loaded, circular-disk microstrip antenna is analysed using three methods of increasing complexity and sophistication. The first method uses a new variational formula which is more suitable for antennas driven by a voltage gap. The second method uses a mode-matching method where the field inside the coaxial line is expanded in terms of waveguide modes. The third method uses the mode-matching method with a diaphragm at the coaxial aperture. The mode-matching methods are identical to the variational formula under the single-mode approximation. However, when a diaphragm is present, the single-mode approximation is insufficient, implying that the variational formula is inaccurate when a diaphragm exists. The theory is used to study the effect of the gap capacitance at the coaxial aperture on the input impedance of the microstrip antenna. It is found that this gap capacitance is important when the dielectric substrate is thick.
Persistent Identifierhttp://hdl.handle.net/10722/182514
ISSN

 

DC FieldValueLanguage
dc.contributor.authorChew, WCen_US
dc.contributor.authorNie, Zen_US
dc.contributor.authorLiu, QHen_US
dc.contributor.authorLo, YTen_US
dc.date.accessioned2013-05-02T05:15:41Z-
dc.date.available2013-05-02T05:15:41Z-
dc.date.issued1991en_US
dc.identifier.citationIee Proceedings H: Microwaves, Antennas And Propagation, 1991, v. 138 n. 2, p. 185-191en_US
dc.identifier.issn0950-107Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/182514-
dc.description.abstractThe input impedance of a probe-fed, annular-ring-loaded, circular-disk microstrip antenna is analysed using three methods of increasing complexity and sophistication. The first method uses a new variational formula which is more suitable for antennas driven by a voltage gap. The second method uses a mode-matching method where the field inside the coaxial line is expanded in terms of waveguide modes. The third method uses the mode-matching method with a diaphragm at the coaxial aperture. The mode-matching methods are identical to the variational formula under the single-mode approximation. However, when a diaphragm is present, the single-mode approximation is insufficient, implying that the variational formula is inaccurate when a diaphragm exists. The theory is used to study the effect of the gap capacitance at the coaxial aperture on the input impedance of the microstrip antenna. It is found that this gap capacitance is important when the dielectric substrate is thick.en_US
dc.languageengen_US
dc.relation.ispartofIEE Proceedings H: Microwaves, Antennas and Propagationen_US
dc.titleAnalysis of a probe-fed microstrip disk antennaen_US
dc.typeArticleen_US
dc.identifier.emailChew, WC: wcchew@hku.hken_US
dc.identifier.authorityChew, WC=rp00656en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0026139234en_US
dc.identifier.volume138en_US
dc.identifier.issue2en_US
dc.identifier.spage185en_US
dc.identifier.epage191en_US
dc.identifier.scopusauthoridChew, WC=36014436300en_US
dc.identifier.scopusauthoridNie, Z=7103290485en_US
dc.identifier.scopusauthoridLiu, QH=26643168800en_US
dc.identifier.scopusauthoridLo, YT=7401934487en_US

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