@inproceedings{66e49b57d3dd493d9688e626eaed3385,
title = "Non-contact measurement of periodic movements by a 22-40GHz radar sensor using nonlinear phase modulation",
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.",
keywords = "Doppler radar, Harmonics, Ka band, Non-contact, Nonlinear, Periodic displacement measurement, Sensor",
author = "Changzhi Li and Jenshan Lin",
year = "2007",
doi = "10.1109/MWSYM.2007.380556",
language = "English",
isbn = "1424406889",
series = "IEEE MTT-S International Microwave Symposium Digest",
pages = "579--582",
booktitle = "2007 IEEE MTT-S International Microwave Symposium Digest",
note = "2007 IEEE MTT-S International Microwave Symposium, IMS 2007 ; Conference date: 03-06-2007 Through 08-06-2007",
}