Broadband frequency and angular response of a sinusoidal bull’s eye antenna

Unai Beaskoetxea, Miguel Navarro-Cia, Miguel Beruete

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
192 Downloads (Pure)

Abstract

A thorough experimental study of the frequency and beaming angle response of a metallic leaky-wave bull's eye antenna working at 77 GHz with a sinusoidally corrugated profile is presented. The beam scanning property of these antennas as frequency is varied is experimentally demonstrated and corroborated through theoretical and numerical results. From the experimental results the dispersion diagram of the n  =  −1 and n  =  −2 space harmonics is extracted, and the operation at different frequency regimes is identified and discussed. In order to show the contribution of each half of the antenna, numerical examples of the near-field behavior are also displayed. Overall, experimental results are in good qualitative and quantitative agreement with theoretical and numerical calculations. Finally, an analysis of the beamwidth as a function of frequency is performed, showing that it can achieve values below 1.5° in a fractional bandwidth of 4% around the operation frequency, which is an interesting frequency-stable broadside radiation.
Original languageEnglish
Article number265103
Pages (from-to)1-6
Number of pages6
JournalJournal of Physics D: Applied Physics
Volume49
Issue number26
DOIs
Publication statusPublished - 25 May 2016

Keywords

  • Bull's eye
  • Corrugated surface
  • Leaky-wave antennas (LWAs)
  • Millimetre-waves

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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