@inproceedings{05c6c0f2f6f042c6bd8171622e04872e,
title = "Optimal carrier frequency of non-contact vital sign detectors",
abstract = "Simulations were performed based on a model developed in ADS to demonstrate the effects of non-linear cosine transfer function in non-contact vital sign detection. Harmonics and intermodulation effects have been analyzed theoretically and demonstrated by simulation. It is shown that in contrast to the observation from simple linear approximation that detection sensitivity always increases with carrier frequency, there is an optimum carrier frequency for non-contact Doppler radar vital sign detection. For typical values of human chest wall movement, the simulation shows that the upper bound of the carrier frequency should be limited to the lower region of the Ka-band to improve detection accuracy.",
keywords = "Doppler radar, Harmonics, Intermodulation, Non-contact, Non-linear transfer function, Optimum carrier frequency, Vital sign detection",
author = "Changzhi Li and Jenshan Lin",
year = "2007",
doi = "10.1109/RWS.2007.351823",
language = "English",
isbn = "1424404452",
series = "Proceedings - 2007 IEEE Radio and Wireless Symposium, RWS",
pages = "281--284",
booktitle = "Proceedings - 2007 IEEE Radio and Wireless Symposium, RWS",
note = "2007 IEEE Radio and Wireless Symposium, RWS ; Conference date: 09-01-2007 Through 11-01-2007",
}