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Full‐wave analysis of a disk‐loaded spherical annular‐ring microstrip antenna
Author(s) -
Chen HongTwu,
Cheng YuanTung
Publication year - 1996
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(19960820)12:6<353::aid-mop13>3.0.co;2-6
Subject(s) - microstrip antenna , patch antenna , standing wave ratio , optics , coaxial antenna , physics , microstrip , radiation pattern , antenna (radio) , materials science , acoustics , electrical engineering , engineering
Abstract In this article we analyze the effect of the disk loading on the characteristics of a spherical annular‐ring microstrip antenna. The antenna is excited by a coaxial probe. The theoretical treatment is based on a full‐wave analysis and a moment‐method calculation. Numerical results of the resonant frequency, input impedance, voltage standing‐wave ratio (VSWR), and radiation characteristics are presented. It is shown that the impedance bandwidth of the spherical annular‐ring microstrip antenna can be broadened by adding a parasitic disk patch. Compared to the single annular‐ring patch case, the spherical annular‐ring microstrip antenna with a parasitic disk patch has larger minor lobes and larger cross‐polarization radiation. © 1996 John Wiley & Sons, Inc.