Omnidirectional Circularly Polarized Dielectric Resonator Antenna with Logarithmic Spiral Slots in the Ground

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Original languageEnglish
Article number7762763
Pages (from-to)839-844
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number2
Publication statusPublished - 1 Feb 2017


A new omnidirectional circularly polarized (CP) cylindrical dielectric resonator (DR) antenna (DRA) is excited by four open-ended logarithmic spiral slots in the ground plane. Radiated Eθ and Eφ components are obtained from the TM01δ mode of the DR and the slotted ground plane, respectively. Omnidirectional CP fields can be obtained when Eθ and Eφ are equal in magnitude but different in phase by 90°. This CP technique does not require any special shape or treatment of DR, greatly facilitating the design. To demonstrate the idea, a prototype using a glass DR was fabricated. It is a dual-function DRA that also serves as the cover of light sources. The prototype has a measured bandwidth of 6.2%, covering the entire 2.4-GHz WLAN band.

Research Area(s)

  • Circular polarization, dielectric resonator antenna (DRA), dual-function antenna, glass antenna, transparent antenna

Citation Format(s)