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Aperture‐coupled cylindrical dielectric resonator antenna
Author(s) -
Drossos George,
Wu Zhipeng,
Davis Lionel E.
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19990320)20:6<407::aid-mop14>3.0.co;2-7
Subject(s) - directivity , aperture (computer memory) , optics , return loss , dielectric resonator antenna , antenna aperture , bandwidth (computing) , microwave , antenna (radio) , acoustics , resonator , materials science , radiation pattern , physics , engineering , electrical engineering , telecommunications
An aperture‐coupled CDRA is theoretically and experimentally investigated. The effects of: 1) the aperture size and 2) the air gap between the CDRA and the aperture on the resonant frequency, return loss, radiation pattern, directivity, unloaded Q ‐factor, and impedance bandwidth are numerically simulated. Based on the numerical results obtained, simple closed‐form expressions are obtained enabling an antenna engineer to incorporate these effects into the design of an aperture‐coupled CDRA. The predicted results were experimentally verified for several aperture sizes, and good agreement was obtained. Results showed that the feeding scheme and the fabrication imperfections have a significant effect on the performance of CDRAs. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 20: 407–414, 1999.