Fingertip Pulse Signals Enhanced by Using Intermodulation Multiplication of Active High-Sensitivity Split-Ring Resonator

Ta Chung Chang, Po Kai Chan, Chia Hui Chen, Kuan Wei Chen, Chin Lung Yang

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

2 Citations (Scopus)

Abstract

This paper presents a novel active split ring resonator (SRR) for detecting the wrist and fingertip pulse signals. Though fingertip signal is extremely tiny in general, the proposed intermodulation multiplication technology can improve the sensitivity by more than 400%. The frequency shift of sensing can be multiplied to highly sensitive by measuring the 3rd, 5th, 7th and 9th intermodulation (IM) components. The pulse signal can be measured from the frequency deviations of SRR by interfering the coupling path on the surface of the sensor. In this work, the highest component can be achieved to 9th IM. The frequency shift of measuring the wrist pulse signal is increased from 3.5 MHz to 16 MHz. The fingertip signal is first measured by a microwave sensor and can achieve high accuracy of less than 0.75% error.

Original languageEnglish
Title of host publicationProceedings of the 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1416-1418
Number of pages3
ISBN (Print)9781538650677
DOIs
Publication statusPublished - 2018 Aug 17
Event2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 - Philadelphia, United States
Duration: 2018 Jun 102018 Jun 15

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2018-June
ISSN (Print)0149-645X

Other

Other2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
CountryUnited States
CityPhiladelphia
Period18-06-1018-06-15

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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