Array antenna device

An array antenna device, comprising:

• a first layer in which a plurality of antenna elements is arranged in a grid pattern;
• and
• a second layer stacked on the first layer, wherein the second layer includes:
• a plurality of mixers disposed in a plurality of grid areas overlapping with the plurality of antenna elements in plan view, each mixer including an LO signal terminal, an IF signal terminal, and an RF signal terminal, the RF signal terminals being electrically connected to the plurality of antenna elements,
• a plurality of LO signal lines provided for each column of the plurality of mixers, the LO signal terminals of the mixers in a same column being commonly connected to the LO signal lines, and
• a plurality of IF signal lines provided for each row of the plurality of mixers, the IF signal terminals of the mixers in a same row being commonly connected to the IF signal lines,
• wherein the second layer includes a plurality of phase shifters connected to at least one of the plurality of LO signal lines and the plurality of IF signal lines, and the plurality of phase shifters is disposed outside the plurality of grid areas.