Miniature wideband UHF circularly polarized antenna using textured dielectric loading Conference

Psychoudakis, D, Volakis, JL. (2005). Miniature wideband UHF circularly polarized antenna using textured dielectric loading . 2015 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING, 3 A 573-576. 10.1109/APS.2005.1552316

cited authors

  • Psychoudakis, D; Volakis, JL

authors

abstract

  • Use of high permittivity dielectrics in antenna design reduces operating frequency but also introduces side effects such as lower gain and bandwidth. To provide an optimal compromise between size, gain and bandwidth, this paper presents a miniaturization scheme for a 15cm (6 inch) square circularly polarized (CP), cavity-backed antenna using textured dielectric loading and a folded metallic strip feed. The proposed design has an operational frequency of 400MHz - 600MHz implying a linear size of 0.2 - 0.3λ0. The challenge for a small size antenna design is to increase bandwidth while retaining a gain of 2-4dBi. By carefully positioning high permittivity textured dielectrics within the aperture in conjunction with shape design, we show that bandwidth and gain are retained as compared to similar sized antennas in the literature. Our final design shows that the developed miniature UHF antenna is at least half the size of the best available. Concurrently it delivers a remarkable 23% bandwidth with an equally remarkable gain of ∼4dBi. Validation/Measured data are also included for a prototype design © 2005 IEEE.

publication date

  • December 1, 2005

published in

Digital Object Identifier (DOI)

International Standard Book Number (ISBN) 10

International Standard Book Number (ISBN) 13

start page

  • 573

end page

  • 576

volume

  • 3 A