Title :
Analysis of ESPAR antennas in indoor multi-path environments for wireless ad-hoc network systems
Author_Institution :
ATR Commun. Syst. Res. Labs., Kyoto, Japan
Abstract :
This paper conducts a performance analysis on electronically steerable passive array radiator (ESPAR) antennas in indoor multi-path environments by a three-dimensional geometrical optics method. ESPAR antennas are novel adaptive array antennas and have only one active element to output signals and multiple parasitic elements with loaded variable reactors. The analysis shows that, besides direct-path environments, ESPAR antennas can also be controlled in multi-path environments by the conventional steepest gradient algorithm. In addition, some positive output SINR values are obtained due to the beamforming ability of ESPAR antennas.
Keywords :
adaptive antenna arrays; directive antennas; geometrical optics; gradient methods; indoor radio; land mobile radio; multipath channels; radio networks; scanning antennas; 3D geometrical optics method; ESPAR antennas; active element; adaptive array antennas; beamforming; direct-path environments; directional antennas; electronically steerable passive array radiator; indoor multi-path environments; loaded variable reactors; multiple parasitic elements; output SINR; performance analysis; steepest gradient algorithm; wireless ad-hoe network systems; Ad hoc networks; Adaptive arrays; Algorithm design and analysis; Antenna arrays; Geometrical optics; Inductors; Loaded antennas; Optical arrays; Optical variables control; Performance analysis;
Conference_Titel :
Wireless Communications and Networking Conference, 2002. WCNC2002. 2002 IEEE
Print_ISBN :
0-7803-7376-6
DOI :
10.1109/WCNC.2002.993333
