A tuneable electrically-small antenna operating in the 'DC' mode

PR Urwin-Wright, GS Hilton, IJ Craddock, PN Fletcher

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

The introduction of a shorting pin to the centre of an annular slot results in an additional, 'DC', mode being excited. Operation in this mode results in an electrically small structure, which is inherently narrow-band. Through the addition of a simple varactor diode we show that this narrow-band 'DC' mode may essentially be made wide-band through frequency tuning. The results presented in this paper consider the input response, 3-D radiation pattern, gain, directivity and efficiency.
Translated title of the contributionA tuneable electrically-small antenna operating in the 'DC' mode
Original languageEnglish
Pages (from-to)524 - 528
JournalIEE 5th European Personal Mobile Communications Conference, 2003
DOIs
Publication statusPublished - 22 Apr 2003
Event5th European Personal Mobile Communications Conference - Strathclyde, United Kingdom
Duration: 1 Apr 2003 → …

Bibliographical note

ISBN: 0852967535
Publisher: Institution of Electrical Engineers (IEE)
Name and Venue of Conference: European Personal Mobile Communications Conference, Glasgow, UK
Rose publication type: Conference contribution

Sponsorship: The authors wish to acknowledge the financial support from the EPSRC and QinetiQ, grant no. 003011875.

Keywords

  • antenna radiation patterns
  • broadband antennas
  • microstrip antennas
  • mobile antennas
  • slot antennas
  • tuning
  • varactors

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