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Four-port beam reconfigurable antenna array for pattern diversity system

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4 Author(s)
V. -A. Nguyen ; Microwave and Antenna Lab, Korean Advanced Institute of Science and Technology ; M. -H. Jeong ; M. -T. Dao ; S. -O. Park

This study investigates a practical design for a switched beam planar antenna that can be implemented as a compact, low-cost switchable and/or reconfigurable beam antenna array. The antenna consists of a four-port antenna array, which is based on L-shaped quarter-wavelength slot antenna elements. This type of antenna array is a planar structure and its maximum directional radiation beam pattern presents in an azimuth plane covering 3600. The antenna array operates based on the `ON' or `OFF' states of PIN diodes in each individual slot antenna element and the combined signals from the four-port output. Therefore by properly controlling the state of the PIN diodes, the antenna exposes its characteristics of switchable/ reconfigurable beam patterns in the Φ-plane. To validate the proposed design, a small smart, switched-beam antenna operating at 2.7 GHz in multiple input-multiple output applications is simulated and fabricated.

Published in:

IET Microwaves, Antennas & Propagation  (Volume:6 ,  Issue: 10 )