Demonstration of an electrically small antenna array for UHF direction-of-arrival estimation

Matthew J. Slater, Christopher D. Schmitz, Michael David Anderson, Douglas L. Jones, Jennifer T. Bernhard

Research output: Contribution to journalArticle

Abstract

Direction-of-arrival (DoA) estimation of incoming electromagnetic signals can play a critical role in surveillance, sensing, and cognitive radio applications. Typical DoA antenna arrays use an aperture measuring several wavelengths across to ensure reliable measurement of phase information. For a UHF application, such an array would need to be a few meters across-too large for a portable array. This work demonstrates a practical DoA array composed of antennas with diverse radiation patterns which is combined with an algorithm which relies primarily on amplitude information rather than phase information. This approach yields a much smaller array with similar direction-finding capabilities to larger ones. A calibration procedure captures the antenna responses, including the parasitic effects of the closely spaced antennas. The calibrated array and direction-finding algorithm then achieves measured accuracy with resolution of six degrees with no front-to-back or quadrant ambiguities.

Original languageEnglish (US)
Article number6353898
Pages (from-to)1371-1377
Number of pages7
JournalIEEE Transactions on Antennas and Propagation
Volume61
Issue number3
DOIs
StatePublished - Jan 1 2013

Keywords

  • Direction-of-arrival (DoA)
  • electrically small antenna
  • minimum-variance distortionless response (MVDR)
  • multiple signal classification (MuSiC)
  • vector sensor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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