Title :
An Innovative Semi-UWB Passive Transponder for Wireless Sensor and RFID Applications
Author :
Nejad, Majid Baghaei ; Chen, Cairong ; Tenhunen, Hanuu ; Zheng, Li-Rong
Author_Institution :
Sch. of Inf. & Commun. Technol., R. Inst. of Technol., Stockholm
Abstract :
In this paper, we present a self-powered CMOS impulse-based ultra wideband radio system for RFIDs and wireless sensor networks (WSN) applications. It is integrated in a liquid-crystal polymer (LCP) based system on package (SoP) module with an embedded small antenna. Our contribution includes using two different standards in up and downstream link. In downstream link, due to demand of low complex, low cost and low power circuit, a very simple and extremely low power pulse width demodulator is used to extract the data from received RF signal. An IR-UWB transmitter is used to transmit the data in upstream link. Power supply is taken from the received RF electromagnetic wave with help of a Schottky diode voltage multiplier. Unlike traditional wireless systems, due to great advantages of UWB communication this transponder does not suffer from multi-path fading, collision problem and multi-user interference. The front-end circuit consists of the power converter; PWM receiver, IR-UWB transmitter, and embedded UWB antenna are designed for integration on liquid-crystal polymer (LCP) substrate
Keywords :
CMOS integrated circuits; Schottky diodes; data communication; demodulators; liquid crystal polymers; low-power electronics; power convertors; radiofrequency identification; radiofrequency integrated circuits; system-in-package; transponders; ultra wideband antennas; voltage multipliers; wireless sensor networks; IR-UWB transmitter; LCP substrate; PWM receiver; RF electromagnetic wave; RFID applications; Schottky diode; SoP; data transmission; downstream link; embedded small antenna; liquid-crystal polymer; low power circuit; power converter; pulse width demodulator; selfpowered CMOS; semiUWB passive transponder; system on package; ultra wideband radio system; voltage multiplier; wireless sensor applications; Costs; Liquid crystal polymers; Packaging; Pulse circuits; Radio transmitters; Radiofrequency identification; Space vector pulse width modulation; Transponders; Ultra wideband technology; Wireless sensor networks;
Conference_Titel :
Industrial and Information Systems, First International Conference on
Conference_Location :
Peradeniya
Print_ISBN :
1-4244-0322-7
DOI :
10.1109/ICIIS.2006.365743
