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- Title
Wide-bandwidth dielectric resonator antenna with omni-directional radiation patterns for beam focusing properties in a circular array.
- Authors
Garg, Mehak; Sharma, Satish K.
- Abstract
Investigation results are presented for a cylindrical dielectric resonator antenna (DRA) with a central airgap, which is excited using a coaxial probe connected to a wire monopole. By selecting the proper values of airgap and monopole heights, a desired impedance bandwidth ( S11 ≤ −10 dB) from 40% to 67% can be achieved. The proposed DRA provides monopole like omni-directional radiation patterns with low crosspolarization levels throughout the bandwidth. Prototype DRA was fabricated with equal heights of the airgap and monopole and experimentally verified for both the impedance matching and radiation performance. Simulated and measured bandwidths of 67% and 64%, respectively, were obtained with acceptable peak realized gain. The simulated and measured radiation patterns agree well. Furthermore, this DRA is investigated for beam focusing properties when implemented in a circular array consisting of four-elements on a circular finite ground plane. © 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:92-101, 2014.
- Subjects
BANDWIDTHS; DIELECTRIC resonator antennas; PARTICLE beam focusing; ELECTRIC wire; ELECTRIC impedance; MONOPOLE antennas
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2014, Vol 24, Issue 1, p92
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.20717