{"title":"Realization of wideband characteristics for a spiral antenna backed by a conducting plane reflector","authors":"H. Nakano, H. Soga","doi":"10.1109/APS.1989.134953","DOIUrl":null,"url":null,"abstract":"It is shown that backing a spiral antenna with a conducting plane reflector narrows the inherent wideband radiation characteristics of the spiral by distorting the current distribution. When a small, circular conducting plane is inserted between the spiral and the plane reflector, the distorted current distribution can be changed to a traveling wave. This traveling-wave current has a decaying amplitude, leading to a desirable radiation beam of good circular polarization. The frequency band for CPW (circularly polarized wave) radiation can be extended from 1:1.18 without the small disk 1:1.42 with the disk.<<ETX>>","PeriodicalId":11330,"journal":{"name":"Digest on Antennas and Propagation Society International Symposium","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1989-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Digest on Antennas and Propagation Society International Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APS.1989.134953","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
It is shown that backing a spiral antenna with a conducting plane reflector narrows the inherent wideband radiation characteristics of the spiral by distorting the current distribution. When a small, circular conducting plane is inserted between the spiral and the plane reflector, the distorted current distribution can be changed to a traveling wave. This traveling-wave current has a decaying amplitude, leading to a desirable radiation beam of good circular polarization. The frequency band for CPW (circularly polarized wave) radiation can be extended from 1:1.18 without the small disk 1:1.42 with the disk.<>
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