Non-contact measurement of periodic movements by a 22-40GHz radar sensor using nonlinear phase modulation

Changzhi Li, Jenshan Lin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

43 Scopus citations

Abstract

A non-contact detection technique of measuring both the frequency and the amplitude of periodic movement using the property of nonlinear phase modulation is proposed and demonstrated by a 22-40GHz radar sensor. It is shown that this method has the following advantages: 1) no calibration of signal amplitude required for accurate measurement of movement amplitude; 2) ability of self-verification; 3) very simple architecture. The method can be used to detect movements with amplitudes larger than 0.335 of the carrier wavelength for a fixed carrier frequency system and 0.214 of the minimum carrier wavelength for a frequency tunable system. By analyzing and simulating the wide angle incidence effect, it is shown that a proper choice of radio frequency, measurement distance, and antenna pattern can ensure accurate measurement of movement amplitudes.

Original languageEnglish
Title of host publication2007 IEEE MTT-S International Microwave Symposium Digest
Pages579-582
Number of pages4
DOIs
StatePublished - 2007
Event2007 IEEE MTT-S International Microwave Symposium, IMS 2007 - Honolulu, HI, United States
Duration: Jun 3 2007Jun 8 2007

Publication series

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

Conference

Conference2007 IEEE MTT-S International Microwave Symposium, IMS 2007
Country/TerritoryUnited States
CityHonolulu, HI
Period06/3/0706/8/07

Keywords

  • Doppler radar
  • Harmonics
  • Ka band
  • Non-contact
  • Nonlinear
  • Periodic displacement measurement
  • Sensor

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