Patent ID: 8749430

Claim:
An active array antenna device comprising: M (M≧2) receiving filters configured to allow part of received signals received by M antenna elements or antenna sub-arrays to pass therethrough, the part being signals within a certain band; M low noise amplifiers configured to amplify M received signals from the M receiving filters; M distributors each configured to distribute a corresponding one of the M amplified signals amplified by the M low noise amplifiers into N (N≧2) distributed signals; M sets of N phase shifters, each set provided for the corresponding one of the distributors and configured to shift phases of the N distributed signals distributed by the distributor; M sets of N attenuators, each set configured to attenuate N phase-shift signals from the N phase shifters; N beam synthesis circuits provided respectively for M sets of the N attenuators, and each configured to synthesize a beam by adding up attenuator outputs that correspond to the M distributors and are outputted by the corresponding set of the M attenuators; a heat insulating container configured to accommodate the receiving filters formed of a superconductor material and the low noise amplifiers; a cooler configured to cool the receiving filters and the low noise amplifiers accommodated in the heat insulating container to make the receiving filters in a superconducting state; and a cooling plate accommodated in the heat insulating container and cooled by the cooler, and on which is placed the receiving filters and the low noise amplifiers.