Millimeter-Wave Pulse Radar Scattering Measurements on the Human Hand

Research output: Contribution to journalArticle

Abstract

We investigate the backscattering of low-power millimeter-wave pulses (wavelets) on the human hand in order to determine the detection limit of scattering features. Using an in-house wavelet radar setup with a nominal spatial resolution of 2.29 cm, we measure a hand in three different postures: a flat hand, a fist, and a hand with raised index finger. For the latter, we are able to resolve backscattering from at least two different scattering centers, attributed to the heel of the hand and the finger. The effective radar cross section in the measurements was in the range from -29.5 to -35.1 dBsm. We demonstrate that detecting scattering features from the hand with an equivalent isotropically radiated power spectral density of -68.5 dBm/MHz is possible. This shows that, compared to most conventional radar systems operating close to the regulatory emission limits (13 dBm/MHz), the energy of the transmitted waveform can be significantly reduced. The result shows that low-power radar systems for gesture recognition are feasible using pulsed systems with ultrashort pulses and low duty cycles. This is key for integration in battery-powered devices.

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • Gesture recognition, millimeter waves, millimeter-wave radar, pulsed radar, radar applications, radar cross-section (RCS) measurement, time-domain analysis
Original languageEnglish
Pages (from-to)1377-1380
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Volume18
Issue number7
Publication statusPublished - 2019 Jul
Publication categoryResearch
Peer-reviewedYes

Related research output

Sebastian Heunisch, 2019 Aug 19, Lund: Lund University. 156 p.

Research output: ThesisDoctoral Thesis (compilation)

View all (1)