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Full-wave analysis of a disk-loaded spherical annular-ring microstrip antenna

✍ Scribed by Hong-Twu Chen; Yuan-Tung Cheng

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 628 KB
Volume: 12
Category: Article
ISSN: 0895-2477
DOI: 10.1002/(sici)1098-2760(19960820)12:6<353::aid-mop13>3.0.co;2-6

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✦ Synopsis

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.

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