Link Budget Analysis and Modeling of Short-Range UWB Channels

• Published in: IEEE transactions on antennas and propagation 2008-08, Vol.56 (8), p.2730-2738
• Main Authors: Irahhauten, Z., Dacuna, J., Janssen, G.J.M., Nikookar, H., Yarovoy, A.G., Ligthart, L.P.
• Format: Article
• Language: English
• Subjects: Antenna measurements; Antennas; Applied sciences; Budgeting; Business and industry local networks; Channels; Communication systems; Design engineering; Equipments and installations; Exact sciences and technology; Frequency measurement; Link budget; Links; Mobile radiocommunication systems; near-field measurements; Networks and services in france and abroad; Phase error; Phase measurement; Pulse shaping methods; Radiocommunications; Receiving antennas; Shape; Size measurement; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Transmission and modulation (techniques and equipments); Ultra wideband antennas; Ultra wideband technology; Ultrawideband; ultrawideband (UWB) antenna; UWB propagation channel; Wideband communications; Wireless personal area networks
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2008.927542

Ultrawideband (UWB) technology is an attractive alternative for short-range applications, e.g., wireless personal area networks. In these applications, transmit and receive antennas are very close to each other and the far-field condition assumed in most of the link budget models may not be satisfied. Under near-field conditions, variations in the link budget and pulse shape compared to the far-field can be observed. In this work, a novel line-of-sight UWB link budget model for very short distances is proposed and validated with measurements using different types of antennas. The proposed model, which takes into account all main near-field effects (i.e., phase error, antenna mismatch and reradiation between antennas) and includes frequency, antenna size and orientation as parameters, shows a good agreement with the simulations and the measurements. This model has also been applied to dispersive antennas (e.g., notch-antennas), and can be used in the design and analysis of short-range UWB communication systems.