Antenna device, antenna module, and communication device

An antenna module comprising:

• a substrate;
• a ground plane provided in or on the substrate;
• a composite antenna provided in or on the substrate;
• a power feeding line configured to supply power to the composite antenna;
• and
• a radio frequency integrated circuit element configured to supply a radio frequency signal to the composite antenna through the power feeding line, wherein:
• the composite antenna includes:
• a patch antenna comprising a power feeding element and the ground plane, and
• an electric current source comprising at least one linear antenna configured to allow a flow of an electric current having a component in a vertical direction with respect to the ground plane, and
• the power feeding line includes:
• a main line connected to the power feeding element, and
• a branch line branched from the main line and connected to the linear antenna.

A communication device comprising:

• an antenna device;
• and
• a housing configured to accommodate the antenna device, wherein:
• the antenna device includes:
• a substrate;
• a ground plane provided in or on the substrate;
• at least one composite antenna provided in or on the substrate;
• and
• a power feeding line configured to supply power to the composite antenna, wherein:
• the composite antenna includes:
• a patch antenna comprising a power feeding element and the ground plane, and
• at least one vertical portion configured to allow a flow of an electric current having a component in a vertical direction with respect to the ground plane,
• the power feeding line includes:
• a main line connected to the power feeding element, and
• a branch line branched from the main line and connected to the vertical portion, and
• the housing includes:
• a conductor portion connected to the vertical portion, wherein the conductor portion and the vertical portion operate together as a linear antenna.