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Regenerative backscatter transponder using the switched injection-locked oscillator concept

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3 Author(s)
Martin Vossiek ; Clausthal University of Technology, Institute of Electrical Information Technology, Leibnizstr. 28, D-38678 Clausthal-Zellerfeld, Germany ; Tobias Schafer ; Dirk Becker

In this paper, a new backscatter transponder type is introduced. The developed transponder regenerates a modulated, phase-coherent high-power response/ replica to an interrogating CW radar signal. To create the amplified phase-coherent transponder response, the switched injection locked oscillator (SILO) concept is applied. Compared with a usual passive backscatter transponder - known e.g. from UHF RFID systems - the reading range of a SILO transponder is substantially increased. It is demonstrated that a reading range above 20 m is easily obtained even with a 5.8 GHz, 15 MBit/s system.

Published in:

Microwave Symposium Digest, 2008 IEEE MTT-S International

Date of Conference:

15-20 June 2008