Abstract
A pattern reconfigurable antenna with vertical polarization is proposed based on two folded near-coupled slot antennas. To achieve two end-fire beams and a bidirectional beam respectively, a central feeding structure and a reconfigurable feeding strip are designed based on the current reverse principle with the help of PIN diodes. A prototype has been fabricated and measured to validate this design. Three high-quality radiation beams have been obtained. In the two end-fire states, the measured peak gain can reach 7.15 dBi and the front-to-back (F/B) ratio is more than 22 dB at 5.7 GHz. In the bidirectional state, the measured peak gain can reach 3.94 dBi and the F/B ratio is less than 0.3 dB.
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