Compact Switched-Beam Antenna Employing a Four-Element Slot Antenna Array for Digital Home Applications
Journal
IEEE Transactions on Antennas and Propagation
Journal Volume
56
Journal Issue
9
Pages
2929--2936
Date Issued
2008-09
Author(s)
Abstract
In this paper a compact switched-beam antenna is proposed. The antenna is composed of a four-element antenna array based on L-shaped quarter-wavelength slot antenna elements. Such an antenna element is a planar structure and presents a directional radiation pattern in the azimuth plane. Its maximum radiation direction is toward near the direction of the open end of the slot. As a result, the open ends of the four slot antennas are arranged toward 0, π/2, π and 3π/2, respectively. The statuses of these antennas are controlled by some diodes. Consequently, by carefully controlling the diodes, an antenna with several switchable patterns can be achieved. To prove the concept, a 2.4-2.5 GHz switched-beam antenna for WLAN applications is designed and implemented. Its size is 52 mm in square. The antenna possesses eight directional patterns and many nearly omnidirectional patterns in the azimuth plane. The experiment results fully demonstrate the performance of the proposed design. The envelope correlations and the characteristics of the designed antenna are also discussed. Due to the compact size and low manufacture cost, such a design can be a promising solution for digital home applications to overcome multipath problems and increase the transmission data rate. © 2008 IEEE.
Subjects
Antenna array; Correlation; Slot antenna
SDGs
Other Subjects
Antenna arrays; Antenna feeders; Applications; Arsenic compounds; Digital arithmetic; Digital devices; Local area networks; Powders; Slot antennas; Wireless local area networks (WLAN); Antenna array; Correlation; Slot antenna; Switched-beam antennas; Directional patterns (antenna)
Type
journal article