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IEICE Transactions on Communications 2007 E90-B(6):1467-1473; doi:10.1093/ietcom/e90-b.6.1467
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Copyright © 2007 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Papers -- Antennas and Propagation

A Regular Nine-Prism Array of Patches for Wireless LANs*

Ying ZHANG1, Qinye YIN1, Ming LUO1 and Yansheng JIANG1

1 The authors are with the School of Electronics and Information Engineering, Xi'an Jiaotong University, P.R.China. E-mail: zhangying{at}mailst.xjtu.edu.cn; E-mail: qyyin{at}mail.xjtu.edu.cn


  Abstract

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.

Key Words: microstrip antenna, switched-beam system, wireless LANs, PIN diodes

Manuscript received October 27, 2005. Manuscript revised October 29, 2006.

* This paper was partially supported by the National Sciences Foundation (No.60572046) and the 863 High-tech Project (2006AA01Z220).


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