Novel closed-form azimuth/elevation angle & polarization estimation technique using only electric dipole triads or only magnetic loop triads with arbitrary unknown spacings

Kainam Thomas Wong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)


This paper introduces a new closed-form ESPRIT-based algorithm for multi-source direction finding using only dipole triads or only loop triads, arbitrarily spaced at possibly unknown locations. A dipole (loop) triad consists of three identical co-located but orthogonally oriented electrically short dipoles (magnetically small loops), separately measuring all three Cartesian components of the incident electric (magnetic) field. ESPRIT exploits the polarizational but non-spatial inter-relations among the three unknown electric-field (magnetic-field) components of each source. By solving a set of non-linear equations relating different entities in the electric-field (or magnetic-field) vector's ambiguous estimate, the signal's arrival angles and polarization states may be unambiguously estimated. Monte Carlo simulation results verify the efficacy and versatility of this scheme. This method, using only dipole triads or only loop triads, represents a simplification of Li's and Wong & Zoltowski's earlier and related direction finding schemes requiring both the six-component electromagnetic vector-sensor, each of which must consist of a dipole triad plus a co-located loop triad.
Original languageEnglish
Title of host publicationProceedings - IEEE International Symposium on Circuits and Systems
ISBN (Print)0780354710
Publication statusPublished - 1 Jan 1999
Externally publishedYes
EventProceedings of the 1999 IEEE International Symposium on Circuits and Systems, ISCAS '99 - Orlando, FL, United States
Duration: 30 May 19992 Jun 1999


ConferenceProceedings of the 1999 IEEE International Symposium on Circuits and Systems, ISCAS '99
Country/TerritoryUnited States
CityOrlando, FL

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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