Open Access

Influence of the Antennas on the Ultra-Wideband Transmission

EURASIP Journal on Advances in Signal Processing20052005:843268

Received: 29 October 2003

Published: 17 March 2005


Spectrum is presently one of the most valuable goods worldwide as the demand is permanently increasing and it can be traded only locally. Since the United States Federal Communications Commission (FCC) has opened the spectrum from to , that is, a bandwidth of , for unlicensed use with up to EIRP, numerous applications in communications and sensor areas are showing up. Like all wireless devices, these have an antenna as an integral part of the air interface. The antennas are modeled as linear time-invariant (LTI) systems with a transfer function. The measurement of the antenna's frequency-dependent directional transfer function is described. Quality measures for the antennas like the peak value of the transient response, its width and ringing, as well as the transient gain are discussed. The application of these quality measures is shown for measurements of different UWB antennas.

Keywords and phrases

ultra-widebandultra-wideband antennasquality measures for UWB antennastime-domain antenna characterizationtransient radiation and reception

Authors’ Affiliations

Institut für Höchstfrequenztechnik und Elektronik, Universität Karlsruhe (TH), Karlsruhe, Germany


© Sörgel and Wiesbeck 2005

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.