A Wide-Angle Scanning Phased Array with Low Gain Variation Using Novel Feeding Scheme

A wide-angle scanning phased array with low gain variation is proposed. In order to widen the scanning range for the phased array and keep the gain flatness, a novel feeding scheme is proposed in this design. A pair of radiators has been attached to a two-way power divider by two identical reconfigurable phase shifters respectively. By utilizing the reconfigurable phase shifters, each antenna unit has three reconfigurable modes. Each mode can matched to different scanning range to realize low gain variation. As a result, wide-angle scanning capability and low gain fluctuation can be realized at the same time. In order verify the proposed concept, a phased array constructed by four antenna units has been designed and simulated. The simulated results validate the proposed design exhibiting a good performance of wide-angle scanning characteristic and low gain fluctuation. This design can be also applicable in antenna in package.