Patent ID: 9620865
Date: 2017-04-11
CPC Classifications: H01Q

Claim:
1. An antenna beam scan module comprising: a Rotman lens that has a plurality of beam ports and a plurality of antenna ports and distributes and combines electric power of signals input and output to the antenna ports; a plurality of antenna elements that input and output radio waves to the antenna ports; a plurality of variable amplifiers that modulate magnitudes of the signals input to the beam ports; a plurality of relative phase detectors that detect a plurality of relative phase differences between the signals input to the adjacent beam ports; a plurality of phase shifters that offset the relative phase differences between the signals supplied to the adjacent beam ports on the basis of the relative phase differences detected by the relative phase detectors; and a plurality of switches that select routes of the signals supplied to the beam ports through the variable amplifiers, wherein the phase shifters are arranged on alternate routes through which the signals are supplied to the plurality of beam ports.