Miniaturized Circularly Polarized Doppler Radar for Human Vital Sign Detection

In this paper, a miniaturized circularly polarized (CP) continuous wave Doppler radar system operating at 2.4 GHz is presented. The radar front end consists of one left-handed CP (LHCP) antenna and one right-handed CP (RHCP) antenna, which share a single patch antenna aperture. Orthogonal polarizati...

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Veröffentlicht in:IEEE transactions on antennas and propagation Jg. 67; H. 11; S. 7022 - 7030
Hauptverfasser: He, Yuchu, Gu, Changzhan, Ma, Haijiang, Zhu, Jiang, Eleftheriades, George V.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.11.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Antenna arrays
Apertures
Circular polarization
Continuous radiation
Couplers
Doppler radar
Gain
Linear polarization
patch antenna
Patch antennas
Polarization
Quadratures
Radar antennas
Radar equipment
Radar systems
Size reduction
ISSN:0018-926X, 1558-2221
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Abstract In this paper, a miniaturized circularly polarized (CP) continuous wave Doppler radar system operating at 2.4 GHz is presented. The radar front end consists of one left-handed CP (LHCP) antenna and one right-handed CP (RHCP) antenna, which share a single patch antenna aperture. Orthogonal polarization is achieved through a modified ring-shaped quadrature hybrid coupler (QHC), and the resulting isolation between the two CP antennas is better than 30 dB. With 0 dBm input power to the transmitting antenna, the proposed radar system can accurately detect heartbeat and respiration movements of human test subjects under 1 m and over a wide angular range. The single dual CP antenna achieves 280% size reduction compared to a traditional two linear polarization patch antenna array with the same isolation level.
AbstractList In this paper, a miniaturized circularly polarized (CP) continuous wave Doppler radar system operating at 2.4 GHz is presented. The radar front end consists of one left-handed CP (LHCP) antenna and one right-handed CP (RHCP) antenna, which share a single patch antenna aperture. Orthogonal polarization is achieved through a modified ring-shaped quadrature hybrid coupler (QHC), and the resulting isolation between the two CP antennas is better than 30 dB. With 0 dBm input power to the transmitting antenna, the proposed radar system can accurately detect heartbeat and respiration movements of human test subjects under 1 m and over a wide angular range. The single dual CP antenna achieves 280% size reduction compared to a traditional two linear polarization patch antenna array with the same isolation level.
Author Zhu, Jiang
He, Yuchu
Gu, Changzhan
Ma, Haijiang
Eleftheriades, George V.
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  givenname: Changzhan
  surname: Gu
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  surname: Eleftheriades
  fullname: Eleftheriades, George V.
  email: gelefth@waves.utoronto.ca
  organization: Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON, Canada
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SubjectTerms Antenna arrays
Apertures
Circular polarization
Continuous radiation
Couplers
Doppler radar
Gain
Linear polarization
patch antenna
Patch antennas
Polarization
Quadratures
Radar antennas
Radar equipment
Radar systems
Size reduction
Title Miniaturized Circularly Polarized Doppler Radar for Human Vital Sign Detection
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Volume 67
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