A Regular Nine-Prism Array of Patches for Wireless LANs

Qinye YIN
Ming LUO
Yansheng JIANG

IEICE TRANSACTIONS on Communications   Vol.E90-B    No.6    pp.1467-1473
Publication Date: 2007/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.6.1467
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
microstrip antenna,  switched-beam system,  wireless LANs,  PIN diodes,  

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Since Smart Antenna technology has powerful spatial processing ability; it is regarded as a promising approach to enhancing the data rates and capacity of wireless LAN systems. In this paper, a small size, practical switched-beam antenna system, well suited for domestic in-home networking in the 2.4 GHz band, is designed and tested. The system has the configuration of regular nine-prism, and nine 1/4 wavelength rectangular patches are symmetrically distributed on the nine sides of the prism. The switching process is based on control of the microstrip used to feed the patch radiators, by placing PIN diodes at the microstrip feeding lines. The antenna array can generate nine beams with a gain of 11 dB. All the beams generated by the system are cophasal excited and have a 40°beamwidth. Compared to the uniform array, the system can guarantee the consistency of every beam and is preferable in shape.