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Reflectenna: a quasi passive on-off keyed microwave telemetry system for remote sensor applications

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2 Author(s)
Ketterl, T.P. ; Center for Ocean Technol., Univ. of South Florida, St. Petersburg, FL ; Weller, T.M.

A method to transmit one-directional wireless data with low power consumption has been investigated. This system, called the 'reflectenna', works on the principle of transmitting information by modulating an incident continuous wave carrier signal prior to re-transmission and consists of two orthogonally linear polarised, micromachined microstrip patch antennas and a single-pole-single-throw switch that modulates the carrier signal. This quasi-passive method to transmit data has been tested with a transceiver system that transmits a 10 GHz carrier signal and demodulates the received signal reflected back from the reflectenna. The carrier signal was modulated with a 2 kHz square wave and a link with a range up to 25 m was achieved.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:1 ,  Issue: 4 )

Date of Publication:

Aug. 2007

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