A Wireless-Powered IR-UWB Transmitter for Long-Range Passive RFID Tags in 90-nm CMOS

Autor:	Tor Sverre Lande, Kin Keung Lee
Rok vydání:	2014
Předmět:	Engineering business.industry Pulse generator Bandwidth (signal processing) Transmitter Electrical engineering Ultra high frequency CMOS Pseudorandom noise Electronic engineering Electrical and Electronic Engineering business Electronic circuit Voltage
Zdroj:	IEEE Transactions on Circuits and Systems II: Express Briefs. 61:870-874
ISSN:	1558-3791 1549-7747
DOI:	10.1109/tcsii.2014.2350292
Popis:	An impulse radio ultrawideband (IR-UWB) transmitter (TX) intended for long-range passive radio-frequency (RF) identification tags is presented. It is wirelessly powered by an ultrahigh-frequency (UHF) signal. A 128-bit pseudonoise code is transmitted when enough energy is harvested. A new on–off-keying multicycle energy-efficient IR-UWB pulse generator (PG) is proposed, and a co-design with power management circuits is introduced to improve the system supply noise performance. A novel injection-locking divider co-designed with an RF voltage rectifier is proposed to eliminate the injection input resistive load that exists in some designs; otherwise, the input sensitivity would be degraded. A proof-of-concept prototype is fabricated in a TSMC 90-nm CMOS process. Measurements show the TX input sensitivity to be approximately $-$ 17.5 dBm with a 900-MHz UHF input. The measured PG output swing is 195 $\hbox{mV}_{{\rm p}{-}{\rm p}}$ with a $-$ 10 dB bandwidth of approximately 3.4 GHz.
Databáze:	OpenAIRE
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