Patent ID: 8644367
Filing Date: 2014-02-04
Classification: H01Q

Abstract:
1. An antenna beam scan unit comprising: a Rotman lens that performs power division and synthesis between a plurality of antenna ports and three or more beam ports; a plurality of antenna elements which are connected to the respective antenna ports of the Rotman lens and to or from which radio waves are inputted or outputted; a plurality of amplifiers the number of which is identical to the number of the beam ports, which are connected to the respective beam ports of the Rotman lens, and which perform amplitude modulation on a signal; a plurality of input paths for a transmission signal disposed in association with the plurality of amplifiers; a plurality of switches for switching the input paths; and a beam control unit that controls the amplifiers and the switches, wherein each of the input paths include a first path and a second path on which a signal that is out of phase with a signal on the first path is produced; and wherein the beam control unit selects two adjoining beam ports, and switches the first paths and second paths as the input paths for the two adjoining beam ports.