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dc.contributor.authorHuang, KFSen_US
dc.contributor.authorTzuang, CKCen_US
dc.date.accessioned2014-12-08T15:41:19Z-
dc.date.available2014-12-08T15:41:19Z-
dc.date.issued2003-02-01en_US
dc.identifier.issn0018-9480en_US
dc.identifier.urihttp://dx.doi.org/10.1109/TMTT.2002.807839en_US
dc.identifier.urihttp://hdl.handle.net/11536/28111-
dc.description.abstractThe aim of this paper is to provide: 1) a detailed description of the higher order leaky modes of the much-used broadside-coupled microstrips and 2) demonstrate the practical application of such leaky modes as an antenna. A representative broadside-coupled transmission-line structure is examined to elucidate the detail of leakage effects at higher order of multilayered three-dimensional microwave and millimeter-wave circuits. Two-layer cases are analyzed from a physical perspective and the total number of first higher order leaky modes is found to be equal to that of microstrips. One of the two first higher order leaky modes obtained in the two-layer case is weakly attenuated, while the other is strongly attenuated. A high-gain narrow-beam leaky-mode antenna using only the weakly attenuated leaky mode is designed and measured as an application of this broadside-coupled structure, exhibiting a marked beamwidth reduction of 60%. This antenna is the first Yagi-Uda-like array antenna that utilizes the higher order leaky modes of the microstrip, for which the three basic elements-driver, reflector, and director-are stacked in the broadside direction. The attenuation rate can be further reduced by adjusting the strip width of the director. The half-power beamwidth of the leaky-mode antenna applying two-layer broadside-coupled microstrips with a wider top microstrip is measured to be 2.10degrees at 25.20degrees from the broadside at 34 GHz.en_US
dc.language.isoen_USen_US
dc.subjectantenna arraysen_US
dc.subjecthigh gainen_US
dc.subjectmultilayereden_US
dc.subjectnarrow beamen_US
dc.titleCharacteristics and design of broadside-coupled transmission line at a higher order leaky modeen_US
dc.typeArticleen_US
dc.identifier.doi10.1109/TMTT.2002.807839en_US
dc.identifier.journalIEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUESen_US
dc.citation.volume51en_US
dc.citation.issue2en_US
dc.citation.spage440en_US
dc.citation.epage447en_US
dc.contributor.department電信工程研究所zh_TW
dc.contributor.departmentInstitute of Communications Engineeringen_US
dc.identifier.wosnumberWOS:000180980100015-
dc.citation.woscount2-
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