Wideband simple cylindrical dielectric resonator antennas

Author

Chair, R. ; Kishk, A.A. ; Lee, K.F.

Author_Institution

Dept. of Electr. Eng., Univ. of Mississippi, University, MS, USA

Volume

15

Issue

4

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

241

Lastpage

243

Abstract

Bandwidths of the coaxial fed and aperture coupled cylindrical dielectric resonator antennas (DRAs) with broadside radiation patterns are enhanced by exciting the HEM_11Δ (1<Δ<2) mode at a frequency close to the HEM_11δ (0<δ<1) mode. Both HEM_11δ and HEM_11Δ modes have similar broadside radiation patterns. Measured impedance bandwidths as much as 26.8% (S₁₁<-10 dB) are achieved for the coaxial fed DRA and 23.7% for the aperture coupled DRA. These bandwidths are comparable to those obtained using stacked DRAs. The resonant frequency of the HEM_11Δ mode can be adjusted by the radius (r) to height (h) ratio of the cylindrical DRA. A wide bandwidth is obtained when this ratio equals to 0.329.

Keywords

antenna radiation patterns; aperture-coupled antennas; dielectric resonator antennas; aperture coupling; broadside radiation patterns; coaxial fed DRA; dielectric resonator antennas; impedance bandwidth; resonant frequency; Antenna measurements; Antenna radiation patterns; Aperture antennas; Aperture coupled antennas; Bandwidth; Broadband antennas; Coaxial components; Dielectric resonator antennas; Geometry; Resonant frequency; Antennas; dielectric resonator antennas (DRAs);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2005.845719

Filename

1416941