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Antenna-pattern diversity versus space diversity for use at handhelds

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4 Author(s)
Mattheijssen, P. ; Philips Res. Labs., Eindhoven, Netherlands ; Herben, M.H.A.J. ; Dolmans, G. ; Leyten, L.

This paper investigates diversity for dual-antenna systems operating in indoor environments. First, an approximated equation of the diversity gain is derived for different combining techniques. These theoretical results show that the two-term approximation, as generally used in the literature , is too rough an estimate. Consequently, a new six-term approximation is derived. Next, it is demonstrated by a comparison of theoretical and experimental diversity gain values that, due to mutual coupling between the two antennas in practice, the diversity gain will not approach 0 dB if the distance between the two antennas approaches zero. Finally, it is concluded from measurements at 900 MHz that antenna-pattern diversity is a better choice than space diversity for use at handhelds.

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:53 ,  Issue: 4 )

Date of Publication:

July 2004

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