Title :
Impact of a user on the performance of MIMO antenna systems in small wireless devices
Author :
Navsariwala, Umesh ; Schamberger, M. ; Buris, N.
Author_Institution :
Motorola Inc., Austin, TX
Abstract :
The antenna of a single antenna mobile device is impacted by the presence of the user. Advances have been made in characterizing this effect. However, in multiple input multiple output (MIMO) antenna systems, this loading effect is even more complicated. This paper presents a study of a MIMO antenna system and the impact of the user on MIMO performance. The MIMO performance of the antenna systems is assessed using tools that combine the active E-field radiation patterns of the antennas with appropriate channel models. The studies properly treat the effect of the user on the antenna system via an electromagnetics exact formulation. It is shown that MIMO antennas in wireless devices provide a degree of system robustness under a variety of simulated usage conditions.
Keywords :
MIMO communication; antenna arrays; antenna radiation patterns; mobile antennas; wireless channels; E-field radiation pattern; MIMO antenna system; antenna channel model; electromagnetic formulation; multiple-input multiple-output system; single antenna mobile device; wireless device; Antenna radiation patterns; Antennas and propagation; Electromagnetic radiation; Finite element methods; Loaded antennas; MIMO; Mobile antennas; Robustness; Transfer functions; Transmitters;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619162
