Analysis and experiment on the modulation sensitivity of doppler radar vibration measurement

Changzhan Gu, Takao Inoue, Changzhi Li

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

This letter analyzes the modulation sensitivity of Doppler radar vibration measurement using both 24 GHz and 2.4 GHz Doppler radars. A rigorous analysis is developed in terms of radar modulation sensitivity. In contrast to the common observation that the modulation sensitivity increases as the carrier frequency increases, it is shown that, for a given vibration motion, there exists a specific carrier frequency for optimal measurement. Experimental demonstration was carried out using both 24 GHz and 2.4 GHz radars to measure the same vibration, and the signal-to-noise ratio (SNR) at the receiver input was compared. It is shown that for cm scale movement, 2.4 GHz radar has a higher modulation sensitivity, while the 24 GHz radar has the optimal modulation sensitivity in the mm scale.

Original languageEnglish
Article number6480894
Pages (from-to)566-568
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume23
Issue number10
DOIs
StatePublished - 2013

Keywords

  • Radar
  • SNR
  • Sensitivity
  • Vibration

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