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A low-cost active antenna for short-range communication applications

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3 Author(s)
Carrez, F. ; I.E.M.N., Villeneuve d''Asq, France ; Stolle, R. ; Vindevoghel, Jean

A low-cost active antenna to be used in a miniature microwave transponder is presented. This active antenna operating at 9.9 GHz consists of a compact microstrip array antenna of electromagnetically gap-coupled rectangular resonators and a novel ASK demodulator/differential phase-shift keying (DPSK) modulator circuit. In order to minimize the power consumption and to reduce the cost of the active antenna, this novel microwave circuit employs a single “cold” MESFET which performs both the modulator and demodulator functions. The original methods used to realize the active antenna provide high performance, size reduction, and low power consumption

Published in:

Microwave and Guided Wave Letters, IEEE  (Volume:8 ,  Issue: 6 )