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This paper presents a compact design of circularly-polarized (CP) shaped-beam antenna array for RFID reader applications at 2.4 GHz. Aperture-coupled patch configuration using ring radiator was adopted as the array element with L-shaped aperture to maintain good axial ratio of the single element. A 10-degree down-tilt in the main beam was realized through synthesized amplitude and phase distributions...
We present a design of multi-beam antenna system using a hybrid scheme of analogous and digital beam-forming mechanisms. Exponentially tapered slot antennas are used as the array elements for a potential broadband operation. The system was prototyped to examine its characteristics in the beam-forming and interference cancellation.
Smart antenna technologies have been widely applied in many wireless communication systems due to performance enhancement in terms of data range, coverage and capacity. Up to now, not much effort was devoted for ultra high-frequency (UHF) radio frequency identification (RFID) applications mainly due to the relatively large size of the antenna element. In this paper, we present a compact-sized electrically...
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