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Tradeoffs in the feed point selection of a cylindrical dielectric resonator antenna

Published online by Cambridge University Press:  26 July 2018

Anuj Kumar Ojha Open the ORCID record for Anuj Kumar Ojha [Opens in a new window]  and
A. V. Praveen Kumar
Anuj Kumar Ojha*
Affiliation:
Department of Electrical and Electronics Engineering BITS Pilani, Pilani Campus, Rajasthan-333031, India
A. V. Praveen Kumar
Affiliation:
Department of Electrical and Electronics Engineering BITS Pilani, Pilani Campus, Rajasthan-333031, India
*
Author for correspondence: Anuj Kumar Ojha, E-mail: [email protected]
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Abstract

This paper aims at investigating the dependence of the impedance and the radiation characteristics of a cylindrical dielectric resonator antenna (DRA), on the feed point of the DRA. It is demonstrated that the resonant frequency, bandwidth, radiation pattern symmetry, and cross-polarized radiation levels depend highly on the feed point. Three standard single-ended feed mechanisms such as the microstrip line, the microstrip slot, and the coaxial probe are taken as examples, to demonstrate the feed-point dependence of the DRA performance. Standard commercial EM simulation tools (ANSYS HFSS and CST Microwave Studio) are used for generating insightful results to help the discussion. This analysis also provides a functional comparison among the above said three feed mechanisms with respect to the feed-point dependence, which is further verified through measurements of DRA prototypes employing the three feeds.

Keywords

Antenna designelectromagnetic compatibilitymodeling and measurements
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Issue 10 , December 2018 , pp. 1196 - 1203
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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