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Novel Beam Scanning Antenna System Fed by Reconfigurable Beamforming Network

In this paper, a novel beam scanning antenna system is presented. The antenna includes 11 units, which cover the range of 90° in the azimuth fed by a reconfigurable beamforming network. And the beamforming network is cascaded by one two-stage Wilkinson power divider, four 1-bit phase shifters and four single-pole three-throw (SP3T) switches. The phase shifters and switches are digitally controlled by PIN diodes. The beam direction of the antenna is switched among 8 cases with each covering 11.25°, further constituting a whole range of 90°.