Papió-Toda, A. (1Dept. Of Signal Theory and Communications (TSC), Universitat Politecnica de Catalunya, Campus Nord UPC, Edif. D-3, Jordi Girona, 1-3, 08034 Barcelona)
Sörgel, W.; Wiesbeck, W. (Institut für Höchstfrequenztechnik und Elektronik, Universität Karlsruhe (TH), Kaiserstrasse 12, 76128 Karlsruhe, Germany)
Joubert, J. (Department of Electrical, Electronic and Computer Engineering, University of Pretoria, 0002 Pretoria, South Africa)
In this paper the characteristics of different small planar omni-directional type antennas are studied in order to determine their suitability for ultra-wideband operation. The antennas are characterized in terms of their transfer properties in both the time and frequency domain. The antenna characteristics in the principal radiation planes are visually presented as colour scaled plots versus time or frequency – making it easy to make comparisons between different antenna types.