Modeling and Design of Dual- and Wide-band Multi-port Circularly Polarized Patch Antennas
Lars E Grimsrud, Farzin Lalezari, and Dejan S. Filipovic
University of Colorado, Boulder
The analysis of a microstrip patch antenna using computational electromagnetic tool, FEKO, is presented in this paper. The antenna is a circularly polarized stacked patch element and it is shown that it can be confgured for both dual-band and wideband operation by changing the sizes of the radiators and their spacings. Pattern symmetry is maintained by utilizing four probes to feed the antenna. The electrical performance of a conventional dual-fed patch is compared to the proposed quad-fed antenna. Varying degrees of model complexity are investigated to observe the tradeoff in electrical performance and it is shown that a simplified computational model provides accurate results. Interactions such as antenna coupling and pattern deformation are summarized by modeling two patch antennas in close proximity. Validation is performed by measurements.
25th Annual Review of Progress in Applied Computational Electromagnetics
2009
March
331-336
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