NDLI: A CMOS UWB pulse beamforming transmitter with Vivaldi array antenna for vital signals monitoring applications

Content Provider	IEEE Xplore Digital Library
Author	de Oliveira, A.M. Ascama, H.D.O. van Noije, W.A.M. Kofuji, S.T. Moreira, L.C.
Copyright Year	2012
Description	Author affiliation: Integrated Systems Laboratory, University of São Paulo São Paulo, Brazil (de Oliveira, A.M.; Ascama, H.D.O.; van Noije, W.A.M.; Kofuji, S.T.) \|\| Analog and Digital Integrated Circuits Project, Laboratory, Catholic University of Santos - UNISANTOS, Santos, SP, Brazil (Moreira, L.C.)
Abstract	This paper presents a new beamforming transmitter, Ultra Wide Band (UWB) pulse generator for contactless radar monitoring applications of vital signals. The system consists of a programmable delay circuit (PDC or τ), UWB pulse generator circuit and an array of Vivaldi planar antennas. Also, a new CMOS PDC controller is developed in order to provide pulse beamforming. The circuit was designed using 0.18μm CMOS process and the planar antenna array was designed with copper and FR-4 substrate. Spice circuit simulations show the generation of pulses with 136mVpp amplitudes and 350ps width. The generated pulse spectrum complies with the Federal Communications Commission (FCC) spectrum mask in the 6–10GHz range. The dynamic energy consumption is around 0.4pJ per pulse using 2V power supply at pulse repetition rate (PRR) of 100MHz. Electromagnetic simulations using CST MW 2010 shows the Main Lobe with an average magnitude of 12dBi, 30° × 32° angular width, and a beam steering between −15° and +25° for θ, and between −20° and +20° for the ϕ angles. This system can be applied to human monitoring in hospitals, ports and airports, industrial plants — like refineries and oil platforms — and military units as well.
Starting Page	1
Ending Page	4
File Size	897628
Page Count	4
File Format	PDF
ISBN	9781467312073
e-ISBN	9781467312080
DOI	10.1109/LASCAS.2012.6180337
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-02-29
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse generation Partial discharges Transmitters Vivaldi antennas RLC circuits Arrays Delay
Content Type	Text
Resource Type	Article

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