A Time-Domain Measurement System for UWB Microwave Imaging

Wenyi Shao, Arezou Edalati, Todd R. McCollough, William J. McCollough

Research output: Contribution to journalArticle

Abstract

A fully automatic time-domain measurement system for ultra-wideband (UWB) microwave imaging is presented. The system uses a pair of movable antennas to transmit and receive custom UWB pulse designs with each antenna able to be independently controlled to rotate about a region of interest. A full measurement, consisting of both incident and total field collections, is completed within 20 min using custom software. The collected data is processed to reconstruct images of three test objects. Imaging results demonstrate the system can localize and recognize different shaped objects, and differentiate multiple objects. The precision of antenna positioning and the impact of random noise on the microwave signal are investigated. The maximal positioning error for the antennas allows for accurate use of the system up to 7 GHz. A comparison between the time-domain system and a frequency-sweep method shows both methods allow for accurate imaging results. The signal-to-noise ratio and image quality may be improved with time-domain results when properly selecting a time window for the received signal.

Original languageEnglish (US)
Pages (from-to)2265-2275
Number of pages11
JournalIEEE Transactions on Microwave Theory and Techniques
Volume66
Issue number5
DOIs
StatePublished - May 1 2018
Externally publishedYes

Fingerprint

Ultra-wideband (UWB)
antennas
Microwaves
Antennas
broadband
Imaging techniques
microwaves
positioning
sweep frequency
random noise
Image quality
Signal to noise ratio
signal to noise ratios
computer programs
pulses

Keywords

  • Imaging system
  • microwave imaging
  • movable antenna
  • multistatic
  • ultrawideband (UWB)

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

A Time-Domain Measurement System for UWB Microwave Imaging. / Shao, Wenyi; Edalati, Arezou; McCollough, Todd R.; McCollough, William J.

In: IEEE Transactions on Microwave Theory and Techniques, Vol. 66, No. 5, 01.05.2018, p. 2265-2275.

Research output: Contribution to journalArticle

Shao, Wenyi ; Edalati, Arezou ; McCollough, Todd R. ; McCollough, William J. / A Time-Domain Measurement System for UWB Microwave Imaging. In: IEEE Transactions on Microwave Theory and Techniques. 2018 ; Vol. 66, No. 5. pp. 2265-2275.
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