DocumentCode :
1250262
Title :
Reconfigurable antenna design for mobile handsets including harmonic radiation measurements
Author :
Elfergani, I.T.E. ; Sadeghpour, T. ; Abd-Alhameed, R.A. ; Hussaini, A.S. ; Noras, J.M. ; Jones, S.M.R. ; Rodriguez, Jose
Author_Institution :
Sch. of Eng., Design & Technol., Univ. of Bradford, Bradford, UK
Volume :
6
Issue :
9
fYear :
2012
Firstpage :
990
Lastpage :
999
Abstract :
The design of a reconfigurable antenna with good load matching and covering a wide frequency range presents a practical challenge when the antenna size is tightly constrained. A procedure is presented for the design of a reconfigurable mobile antenna, which overcomes the antenna size limitations. Tuning is achieved by placing a varactor diode at a specific position across a slot in the radiator conducting surface. The fabricated antenna is designed to cover a wide band, between 1700 and 2040 MHz, at a return loss better than 10 dB. The radiation of harmonics generated because of the varactor non-linearities are simulated and measured. The experimental set-up ensures that the low levels of radiated harmonics are reliably validated. The experimental results show good agreement with that computed using the Friis equation.
Keywords :
UHF antennas; antenna radiation patterns; broadband antennas; mobile antennas; mobile handsets; varactors; Friis equation; antenna size; harmonic radiation measurements; load matching; mobile handsets; radiator conducting surface; reconfigurable antenna design; varactor diode; varactor nonlinearities;
fLanguage :
English
Journal_Title :
Microwaves, Antennas & Propagation, IET
Publisher :
iet
ISSN :
1751-8725
Type :
jour
DOI :
10.1049/iet-map.2012.0063
Filename :
6248282
Link To Document :
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