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DESIGN OF BANDPASS FILTERS FOR UWB WIRELESS SYSTEMS
BibTeX
@MISC{Toya_designof,
author = {Sunao Toya and A S Mohan and Toshiyuki Yakabe},
title = {DESIGN OF BANDPASS FILTERS FOR UWB WIRELESS SYSTEMS},
year = {}
}
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Abstract
Ultra-wideband (UWB) wireless technology has recently gained a renewed stimulus and wider attention due to the release of unlicensed spectrum by Federal Communications Committee (FCC) of USA in the 3.1~10.6 GHz band for short range communications. It is becoming evident that UWB systems will play a crucial role in future wireless sensor networks, wireless body worn personal area/body area networks [WPAN/WBAN]. As the UWB spectrum covers a very wide range of frequencies, interference becomes one of the important issues for any new services to coexist with current radio systems. Thus, filters that cover the whole UWB band forms an important part of any UWB wireless communication system. Microstrip parallel coupled line filters are known to be low-cost wideband filters, but they usually require very tight coupling gaps and high fabrication tolerances. Aperture compensation technique was also utilised to increase the coupling [1]. In this paper, we investigate the design of UWB filters based on the Z-transform technique using particle swarm optimization (PSO) instead of least mean square errors [2]. Our aim is to design microstrip line based UWB bandpass filters using the above design method. Let us consider a filter consisting of a cascade of shunt short circuited stubs of electrical length 2/π at the centre frequency. The transfer function of this filter can be represented as 0f)(1
Keyphrases
uwb wireless communication system wpan wban design method wider attention wireless technology federal communication committee wide range short range communication particle swarm optimization aperture compensation technique current radio system filter consisting low-cost wideband filter whole uwb band form new service crucial role line filter centre frequency uwb spectrum transfer function future wireless sensor network uwb filter unlicensed spectrum uwb system important part uwb bandpass filter ghz band mean square error important issue z-transform technique high fabrication tolerance electrical length
