Title :
Performance of antennas in the on-body environment
Author :
Kamarudin, M.R. ; Nechayev, Y.I. ; Hall, P.S.
Author_Institution :
Dept. of Electron., Electr. & Comput. Eng., Univ. of Birmingham, UK
Abstract :
This paper presents the performance of antenna combinations for on body communications. Several different antennas have been designed and built such as monopole antennas, patch antenna, loop antenna, patch and patch array antennas. These antennas were designed for the operation in the unlicensed ISM band, 2.45 GHz. The antennas then were tested in the on body environment. The performance of the antenna combinations is determined by measuring the path gain between two on-body paths for a range of body postures. Measurement results show that the combination of monopole antennas performs best in most of the measurement cases compared to other combinations. The comparison between calculation and measurement results, which consider the free space loss and antenna gain give results that are within 10dB of measurements for most body postures.
Keywords :
UHF antennas; gain measurement; loop antennas; loss measurement; microstrip antenna arrays; mobile antennas; monopole antennas; 2.45 GHz; antenna gain; body postures; free space loss; loop antenna; monopole antennas; on body communications; on-body antennas; patch array antennas; path gain measurement; unlicensed ISM band; Antenna measurements; Antennas and propagation; Belts; Gain measurement; Humans; Loss measurement; Receiving antennas; Space technology; Transmitting antennas; Wrist;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552290
