Square spiral antenna on dielectric half-space: Analysis using an electric field equation formulated by a finite-difference technique

H. Nakano, K. Hirose, M. Yamazaki, J. Yamauchi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A tangential electric field equation for a wire antenna on a dielectric half-space of relative permittivity εr is formulated using a finite-difference technique. This equation involves only single-integral calculations and is used to obtain the current distribution of a square spiral antenna. The validity of the current obtained is checked by FD-TD analysis. Based on the current distribution obtained, the radiation characteristics of the spiral are evaluated. It is found that the gain in the dielectric material is larger than that in free space, with a ratio of εr1.5 in the broadside directions. As εr increases, the circularly polarised radiation region bounded by the critical angles in the dielectric becomes narrower and the resistance value of the input impedance becomes lower.

Original languageEnglish
Pages (from-to)70-74
Number of pages5
JournalIEE Proceedings: Microwaves, Antennas and Propagation
Volume145
Issue number1
DOIs
Publication statusPublished - 1998

Keywords

  • Finite-difference technique
  • Spiral antennas

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Square spiral antenna on dielectric half-space: Analysis using an electric field equation formulated by a finite-difference technique'. Together they form a unique fingerprint.

  • Cite this