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Prediction of aperture efficiency ripple in clear aperture offset Gregorian antennas

dc.contributor.authorDe Villiers, Dirk I. L.en_ZA
dc.date.accessioned2016-07-14T07:59:15Z
dc.date.available2016-07-14T07:59:15Z
dc.date.issued2013
dc.identifier.citationDe Villiers, D. I. L. 2013. Prediction of aperture efficiency ripple in clear aperture offset Gregorian antennas. IEEE Transactions on Antennas and Propagation, 61(5):2457-2465, doi: 10.1109/TAP.2013.2239953
dc.identifier.issn0018-926X (online)
dc.identifier.otherdoi: 10.1109/TAP.2013.2239953
dc.identifier.urihttp://hdl.handle.net/10019.1/99183
dc.descriptionCITATION: De Villiers, D. I. L. 2013. Prediction of aperture efficiency ripple in clear aperture offset Gregorian antennas. IEEE Transactions on Antennas and Propagation, 61(5):2457-2465, doi: 10.1109/TAP.2013.2239953.
dc.descriptionThe original publication is available at http://ieeexplore.ieee.org
dc.description.abstractENGLISH ABSTRACT: Electrically small clear aperture dual offset reflector systems often exhibit a directivity ripple over frequency due to the interference of the diffracted field from the sub-reflector with the main beam field. This paper investigates the cause of the ripple, and presents a technique to predict the expected system directivity, including the ripple, using the feed radiation pattern augmented by an efficient simulation strategy in a clear aperture offset Gregorian system. The method allows for accurate prediction of the directivity ripple using a severely under-sampled set of simulation results. Predicted results are compared to several simulations, and agreement to better than 0.5 % is found for the majority of configurations using both analytical and full wave simulated feed patterns.en_ZA
dc.description.abstractAFRIKAANSE OPSOMMING: Geen opsomming beskikbaaraf_ZA
dc.description.urihttp://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6410347&tag=1
dc.format.extent8 pagesen_ZA
dc.language.isoen_ZAen_ZA
dc.publisherInstitute of Electrical and Electronics Engineersen_ZA
dc.subjectDiffractionen_ZA
dc.subjectRadio astronomyen_ZA
dc.subjectAperture efficiencyen_ZA
dc.subjectReflector antennasen_ZA
dc.titlePrediction of aperture efficiency ripple in clear aperture offset Gregorian antennasen_ZA
dc.typeArticleen_ZA
dc.description.versionPost print version
dc.rights.holderInstitute of Electrical and Electronics Engineersen_ZA


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