Transponder array system with universal on-sheet reference scheme for wireless mobile sensor networks without battery or oscillator

Takahide Terada, Haruki Fukuda, Tadahiro Kuroda

Research output: Contribution to journalArticle

Abstract

A rotating shaft with attached sensors is wrapped in a two-dimensional waveguide sheet through which the data and power are wire-lessly transmitted. A retrodirective transponder array affixed to the sheet beamforms power to the moving sensor to eliminate the need for a battery. A universal on-sheet reference scheme is proposed for calibrating the transponder circuit delay variation and eliminating a crystal oscillator from the sensor. A base signal transmitted from the on-sheet reference device is used for generating the pilot signal transmitted from the sensor and the power signal transmitted from the transponder. A 0.18-μm CMOS transponder chip and the sheet with couplers were fabricated. The coupler has three resonant frequencies used for the proposed system. The measured propagation gain of the electric field changes to less than ±1.5 dB within a 2.0-mm distance between the coupler and the sheet. The measured power transmission efficiency with beamforming is 23 times higher than that without it. Each transponder outputs 1W or less for providing 3mW to the sensor.

Original languageEnglish
Pages (from-to)932-941
Number of pages10
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE98A
Issue number4
DOIs
Publication statusPublished - 2015 Apr 1

Fingerprint

Mobile Sensor Networks
Transponders
Battery
Sensor networks
Wireless Sensor Networks
Wireless networks
Coupler
Sensor
Sensors
Delay circuits
Crystal oscillators
Resonant Frequency
Beamforming
Power transmission
Waveguide
Natural frequencies
Electric Field
Rotating
Waveguides
Chip

Keywords

  • Beamforming
  • Phase-conjugation
  • Retrodirective array
  • Two-dimensional waveguide sheet
  • Wireless power transmission

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Graphics and Computer-Aided Design
  • Applied Mathematics
  • Signal Processing

Cite this

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abstract = "A rotating shaft with attached sensors is wrapped in a two-dimensional waveguide sheet through which the data and power are wire-lessly transmitted. A retrodirective transponder array affixed to the sheet beamforms power to the moving sensor to eliminate the need for a battery. A universal on-sheet reference scheme is proposed for calibrating the transponder circuit delay variation and eliminating a crystal oscillator from the sensor. A base signal transmitted from the on-sheet reference device is used for generating the pilot signal transmitted from the sensor and the power signal transmitted from the transponder. A 0.18-μm CMOS transponder chip and the sheet with couplers were fabricated. The coupler has three resonant frequencies used for the proposed system. The measured propagation gain of the electric field changes to less than ±1.5 dB within a 2.0-mm distance between the coupler and the sheet. The measured power transmission efficiency with beamforming is 23 times higher than that without it. Each transponder outputs 1W or less for providing 3mW to the sensor.",
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AU - Fukuda, Haruki

AU - Kuroda, Tadahiro

PY - 2015/4/1

Y1 - 2015/4/1

N2 - A rotating shaft with attached sensors is wrapped in a two-dimensional waveguide sheet through which the data and power are wire-lessly transmitted. A retrodirective transponder array affixed to the sheet beamforms power to the moving sensor to eliminate the need for a battery. A universal on-sheet reference scheme is proposed for calibrating the transponder circuit delay variation and eliminating a crystal oscillator from the sensor. A base signal transmitted from the on-sheet reference device is used for generating the pilot signal transmitted from the sensor and the power signal transmitted from the transponder. A 0.18-μm CMOS transponder chip and the sheet with couplers were fabricated. The coupler has three resonant frequencies used for the proposed system. The measured propagation gain of the electric field changes to less than ±1.5 dB within a 2.0-mm distance between the coupler and the sheet. The measured power transmission efficiency with beamforming is 23 times higher than that without it. Each transponder outputs 1W or less for providing 3mW to the sensor.

AB - A rotating shaft with attached sensors is wrapped in a two-dimensional waveguide sheet through which the data and power are wire-lessly transmitted. A retrodirective transponder array affixed to the sheet beamforms power to the moving sensor to eliminate the need for a battery. A universal on-sheet reference scheme is proposed for calibrating the transponder circuit delay variation and eliminating a crystal oscillator from the sensor. A base signal transmitted from the on-sheet reference device is used for generating the pilot signal transmitted from the sensor and the power signal transmitted from the transponder. A 0.18-μm CMOS transponder chip and the sheet with couplers were fabricated. The coupler has three resonant frequencies used for the proposed system. The measured propagation gain of the electric field changes to less than ±1.5 dB within a 2.0-mm distance between the coupler and the sheet. The measured power transmission efficiency with beamforming is 23 times higher than that without it. Each transponder outputs 1W or less for providing 3mW to the sensor.

KW - Beamforming

KW - Phase-conjugation

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KW - Two-dimensional waveguide sheet

KW - Wireless power transmission

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