Compact dielectric resonator antennas with ultrawide 60%-110% bandwidth

Yuehe Ge*, Karu P. Esselle, Trevor S. Bird

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)


The design of rectangular dielectric resonator antennas (DRA) with ultrawide bandwidths, in the range of 60-110%, is described. The DRA exploits multiple low-Q modes with overlapping bandwidths to achieve a wide contiguous bandwidth. This is achieved using a full-length, low-permittivity inset between a higher permittivity dielectric volume and a ground plane. With the proposed dielectric arrangement and a feed inside DR, it is possible to efficiently couple a sufficient number of such overlapping modes to a 50 Ω feedline. The volume of such DRAs is also reduced by means of a finite planar conducting wall. These advantages led to an example design with a bandwidth that is significantly wide and at the same time has a smaller DR volume than conventional DRAs. A prototype antenna designed to operate in the FCC UWB band from 3.1 to 10.6 GHz has a dielectric volume of 12 × 8 × 15.2 mm3 (or 1.7 × 10-3 λ03 at 3.1 GHz), and an average measured gain of 5 dB over the band.

Original languageEnglish
Article number5951737
Pages (from-to)3445-3448
Number of pages4
JournalIEEE Transactions on Antennas and Propagation
Issue number9
Publication statusPublished - Sep 2011


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