The Characteristics of Iris-Fed Millimeterwave Rectangular Microstrip Patch Antennas

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Description

From introduction: The fabrication of various iris-fed millimeterwave rectangular microstrip patch antennas is described. A model is proposed to describe the iris-fed antenna. Irises ranging in size from 15 percent of the area of the patch to the fully open waveguide are used to couple energy into the antenna. Resonance of the antenna is observed to be insensitive to the size of the iris for irises up to 115 percent of the size of the patch. A study is also made of th? relationship of coupling to the antenna as a function of position of the iris with respect to ... continued below

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44 p. : ill. ; 28 cm.

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Greenlee, D. H.; Kanda, Motohisa & Chang, David C. October 1983.

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Description

From introduction: The fabrication of various iris-fed millimeterwave rectangular microstrip patch antennas is described. A model is proposed to describe the iris-fed antenna. Irises ranging in size from 15 percent of the area of the patch to the fully open waveguide are used to couple energy into the antenna. Resonance of the antenna is observed to be insensitive to the size of the iris for irises up to 115 percent of the size of the patch. A study is also made of th? relationship of coupling to the antenna as a function of position of the iris with respect to the transverse plane of the waveguide, the iris always being centered with respect to the patch. In general, the antenna has a VSWR in the waveguide feed on the order of 5:1 at resonance, except for the fully open waveguide which gives rise to a VSWR of 2.9:1 at resonance. Far-field antenna power patterns are observed to be quite broad with H-plane beamwidths on the order of 1300. Maximum antenna gain is seen to be 4.5 dBi with 3 dBi typical. An initial study is made of the microstrip patch antenna fed from a longitudinal waveguide wall. Results indicate that this feed structure is likely to prove valuable for microstrip patch antennas with coupling at least as good as for the transverse-fed patch added to the possibility of feeding of multiple patches from a single waveguide.

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44 p. : ill. ; 28 cm.

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Digitized from microfiche (1).

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  • October 1983

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  • Jan. 27, 2017, 10:19 a.m.

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  • Jan. 3, 2018, 2:26 p.m.

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Greenlee, D. H.; Kanda, Motohisa & Chang, David C. The Characteristics of Iris-Fed Millimeterwave Rectangular Microstrip Patch Antennas, report, October 1983; Washington D.C. (digital.library.unt.edu/ark:/67531/metadc502569/: accessed April 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.