Interferometric radar sensor with active transponders for signal boosting and clutter rejection in Structural Health Monitoring

Changzhan Gu, Guochao Wang, Jennifer A. Rice, Changzhi Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

A continuous wave (CW) radar sensor system with active transponders is designed for Structural Health Monitoring (SHM) to accurately measure the structures' vibration while rejecting clutters reflected from the surrounding environment. The radar sensor, designed with a coherent heterodyne architecture, transmits a single-tone 2.4 GHz signal and receives a returning signal at 3.3 GHz, thus rejecting the backscattered clutters at 2.4 GHz. The active transponder was designed to convert the received 2.4 GHz signal up to 3.3 GHz and transmits a 900 MHz reference to synchronize the radar sensor. The proposed radar with active transponders was tested in lab environment to successfully capture vibration movements from 4.1 m with SNR over 35 dB. Experiments also showed that the radar sensor can isolate the target motion from the interferences from surrounding shaking bodies and sinusoidal phantom motions.

Original languageEnglish
Title of host publicationIMS 2012 - 2012 IEEE MTT-S International Microwave Symposium
DOIs
StatePublished - 2012
Event2012 IEEE MTT-S International Microwave Symposium, IMS 2012 - Montreal, QC, Canada
Duration: Jun 17 2012Jun 22 2012

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Conference

Conference2012 IEEE MTT-S International Microwave Symposium, IMS 2012
CountryCanada
CityMontreal, QC
Period06/17/1206/22/12

Keywords

  • Active transponder
  • Clutter rejection
  • Radar
  • Structural health monitoring
  • Vibration measurement

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    Gu, C., Wang, G., Rice, J. A., & Li, C. (2012). Interferometric radar sensor with active transponders for signal boosting and clutter rejection in Structural Health Monitoring. In IMS 2012 - 2012 IEEE MTT-S International Microwave Symposium [6259700] (IEEE MTT-S International Microwave Symposium Digest). https://doi.org/10.1109/MWSYM.2012.6259700