ANTENNA MODULE, ANTENNA SYSTEM, AND RADIO WAVE RECEPTION METHOD

A plurality of antenna elements each include two ports that receive two linearly polarized waves that are orthogonal to each other, wherein polarization directions of the linearly polarized waves received at the two ports of the plurality of antenna elements are different among the plurality of antenna elements. Circuitry processes signals received at the plurality of antenna elements, and when a radio wave arrives, the circuitry compares, among a plurality of ports included in the plurality of antenna elements, reception levels of linearly polarized components received at the plurality of ports, and detects a port with the highest reception level.