Five-Port Receiver for Vital Signs Detection

Chang Huan, Panagiota Kontou, Symeon Nikolaou, Souheil Ben-Smida, Dimitris E. Anagnostou

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


A novel RF circuit, specifically a five-port receiver (FPR) for vital signs detection is presented. The proposed receiver operates at 5.8 GHz with a continuous wave (CW) signal. The system, which operates as a doppler-RADAR, was simulated, fabricated, and characterized and measurements of respiration rate and heart rate are performed. The concept relies on the detection of the phase of the received signal which changes due to the physical movement of the chest and nearby biological tissues. This is performed with the FPR, the associated calibration, and the signal processing procedure. Accurate measurements of respiration and heartbeat frequency as well as their time domain waveforms are obtained. Additionally, a microstrip and a Vivaldi antenna were also used which helped achieve longer distance monitoring.

Original languageEnglish
Title of host publication2022 IEEE USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)
Number of pages2
ISBN (Electronic)9781946815163
Publication statusPublished - 16 Sep 2022
Event2022 IEEE USNC-URSI Radio Science Meeting (Joint with AP-S Symposium) - Denver, United States
Duration: 10 Jul 202215 Jul 2022


Conference2022 IEEE USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)
Abbreviated titleUSNC-URSI 2022
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Instrumentation


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