waveguide slot array antenna with a hybrid-phase feed for grating lobe reduction
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ID: 218374
2016
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Abstract
The design of a 112-element millimeter-wave waveguide slot array antenna to reduce the grating lobe level is presented. A hybrid-phase feeding technique combining a cophase feed and an alternating-phase feed is applied to facilitate the suppression of grating lobes. In addition, a stepped feed waveguide and offset coupling slots aligned in a line are employed to realize a tapered aperture distribution. As a result, grating lobe suppression of 8.1 dB was achieved on the diagonal planes compared to a conventional alternating-phase-fed waveguide slot array antenna. A prototype of the proposed antenna was fabricated and measured. The measured results show that the proposed antenna exhibits a −15 dB reflection bandwidth of 3.4% and an average realized gain of 26.72 dBi within the measured frequency range. Good agreement between the simulated and measured radiation patterns is also observed.
| Reference Key |
trinh-van2016internationalwaveguide
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|---|---|
| Authors | ;Son Trinh-Van;Sung Chan Song;Seung-Hee Seo;Keum Cheol Hwang |
| Journal | american journal of physiology endocrinology and metabolism |
| Year | 2016 |
| DOI |
10.1155/2016/4825924
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| URL | |
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