Portable real-time microwave camera at 24 GHz

Mohammad Tayeb Ghasr*, Mohamed A. Abou-Khousa, Sergey Kharkovsky, R. Zoughi, David Pommerenke

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

This paper presents a microwave camera built upon a two-dimensional array of switchable slot antennas. The camera borrows from modulated scattering techniques to improve isolation among the array elements. The camera was designed to measure vector electric field distribution, be compact, portable, battery operated, possess high dynamic range, and be capable of producing real-time images at video frame-rate. This imaging system utilizes PIN diode-loaded resonant elliptical slot antennas as its array elements integrated in a simple and relatively low-loss waveguide network thus reducing the complexity, cost and size of the array. The sensitivity and dynamic range of this system is improved by utilizing a custom-designed heterodyne receiver and matched filter for demodulation. The performance of the multiplexing scheme, noise-floor and dynamic range of the receivers are presented as well. Sources of errors such as mutual-coupling and array response dispersion are also investigated. Finally, utilizing this imaging system for various applications such as 2-D electric field mapping, and nondestructive testing is demonstrated.

Original languageEnglish
Article number6058691
Pages (from-to)1114-1125
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Volume60
Issue number2 PART 2
DOIs
Publication statusPublished - 1 Feb 2012
Externally publishedYes

Keywords

  • Electric field mapping
  • Microwave camera
  • Nondestructive testing
  • Real-time imaging
  • Switchable slot antenna

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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