Advanced non-contact near-field proximity vital sign sensor using phase locked loop

Yunseog Hong, Sang Gyu Kim, Byung Hyun Kim, Hee Jo Lee, Gi Ho Yun, Jong Gwan Yook

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

3 Citations (Scopus)

Abstract

A non-contact near-field vital sensor based on phase locked loop (PLL) circuit is proposed for vital signal detection, such as heartbeat and respiration. The main idea of the proposed vital sensor is to utilize the oscillation frequency deviation caused by the input impedance variation of the planar type circular resonator within near-field region due to respiration exercise of a human. A low loaded quality factor resonator and the small gain of the voltage controlled oscillator (VCO) allow the sensor to increase the detection range. Also, the PLL is employed as a frequency deviation detector, which converts the amount of the frequency deviation into a voltage difference in this work. Experimental results reveal that the proposed vital sensor can be used to detect the heartbeat and respiration signals within 50 mm measurement distance.

Original languageEnglish
Title of host publicationEuropean Microwave Week 2013, EuMW 2013 - Conference Proceedings; EuMC 2013
Subtitle of host publication43rd European Microwave Conference
Pages605-608
Number of pages4
Publication statusPublished - 2013 Dec 1
Event2013 43rd European Microwave Conference, EuMC 2013 - Held as Part of the 16th European Microwave Week, EuMW 2013 - Nuremberg, Germany
Duration: 2013 Oct 72013 Oct 10

Publication series

NameEuropean Microwave Week 2013, EuMW 2013 - Conference Proceedings; EuMC 2013: 43rd European Microwave Conference

Other

Other2013 43rd European Microwave Conference, EuMC 2013 - Held as Part of the 16th European Microwave Week, EuMW 2013
CountryGermany
CityNuremberg
Period13/10/713/10/10

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Hong, Y., Kim, S. G., Kim, B. H., Lee, H. J., Yun, G. H., & Yook, J. G. (2013). Advanced non-contact near-field proximity vital sign sensor using phase locked loop. In European Microwave Week 2013, EuMW 2013 - Conference Proceedings; EuMC 2013: 43rd European Microwave Conference (pp. 605-608). [06686728] (European Microwave Week 2013, EuMW 2013 - Conference Proceedings; EuMC 2013: 43rd European Microwave Conference).