Abstract
This paper presents a novel small-size directional antenna design for ultrawide-band wireless body area networks/wireless personal area networks applications. The design is based on a typical slot antenna structure with an added reflector in order to achieve directionality. The effects of different antenna parameters and human body proximity on the radiation characteristics are analyzed. Antenna measurements with an optic RF setup were performed in order to characterize the small-size antenna far field radiation pattern. The different structural antenna parameters were optimized via extensive numerical simulations. Results show that for frequencies above 3.5 GHz, where the power front-to-back ratio of the directional antenna is greater than 10 dB, its impedance is nearly the same as in the free space. It is not the case neither for the omnidirectional slot antenna nor the monopole antenna next to the body. Between 3 and 6 GHz performance of the novel directional antenna, in terms of radiation efficiency and SAR values, is significantly improved compared to omnidirectional antenna designs.
| Translated title of the contribution | Novel small-size directional antenna for UWB WBAN/WPAN applications |
|---|---|
| Original language | English |
| Pages (from-to) | 3884 - 3896 |
| Number of pages | 13 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 53 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2005 |
Bibliographical note
Publisher: IEEERose publication type: Journal article
Terms of use: Copyright © 2005 IEEE. Reprinted from IEEE Transactions on Antennas and Propagation.
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected].
By choosing to view this document, you agree to all provisions of the copyright laws protecting it.