Open AccessHigh‐sensitivity, AM‐modulated harmonic transceiver for wireless sensing
Author(s) -
Davidova R.,
Weller T.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2012.3388
Subject(s) - transceiver , electrical engineering , frequency multiplier , electronic engineering , harmonic , radio frequency , voltage , biasing , frequency modulation , engineering , physics , cmos , acoustics
Described is a zero power transceiver that is designed to receive a low‐power RF signal at a fundamental frequency, double the frequency with high efficiency, and retransmit the second harmonic. The specific emphasis of this reported work was to demonstrate a means of imparting amplitude modulation onto the retransmitted harmonic in response to some environmental stimulus – in this case a DC bias voltage – to facilitate use of the transceiver in wireless sensing applications. The 1.3/2.6 GHz transceiver zero‐bias conversion efficiency is approximately 2% (−17 dB) at received input power levels in the micro‐Watt range. A change in the conversion efficiency of 10 dB per 100 mV is achieved through DC biasing of the multiplier.