CONCENTRIC MICROSTRIP RING ANTENNA - THEORY AND EXPERIMENT

Citation
Is. Misra et Sk. Chowdhury, CONCENTRIC MICROSTRIP RING ANTENNA - THEORY AND EXPERIMENT, Journal of electromagnetic waves and applications, 10(3), 1996, pp. 439-450
Citations number
20
Categorie Soggetti
Physycs, Mathematical","Physics, Applied","Engineering, Eletrical & Electronic
ISSN journal
09205071
Volume
10
Issue
3
Year of publication
1996
Pages
439 - 450
Database
ISI
SICI code
0920-5071(1996)10:3<439:CMRA-T>2.0.ZU;2-S
Abstract
The impedance and radiation properties of an electromagnetically fed c oncentric microstrip ring antenna using log-periodic principle is inve stigated experimentally and compared with those of two single ring res onators. The experimental result is verified numerically by Finite Dif ference Time Domain (FDTD) method. The variation of voltage standing w ave ratio with frequency is also measured and computed numerically for both the single rings and concentric structure. The comparison betwee n numerical and experimental results shows good agreement over a wide frequency range. The results indicate a considerable improvement of 1: 2 VSWR bandwidth for the concentric structure.