Wireless communication device

A wireless communication device comprising:

• a substrate containing a dielectric;
• a zeroth-order resonance antenna;
• a high frequency circuit mounted on the substrate;
• and
• a metal body mounted on the substrate, wherein
• the zeroth-order resonance antenna includes:
• a main plate arranged on a bottom surface of the substrate and providing a ground potential;
• a patch portion arranged on a top surface of the substrate and including a feeding point;
• a feeder line extending from the feeding point of the patch portion to electrically connect the patch portion and the high frequency circuit, at least a part of the feeder line being arranged on the top surface of the substrate;
• and
• a short circuit portion arranged in the substrate and electrically connecting the patch portion and the main plate, and
• the metal body is configured to
• have a same potential as the main plate,
• have a metal body height greater than a patch portion height,
• and
• in a plan view, be arranged (i) at least partially within a range of a width of the feeder line seen from an alignment direction of a center of the patch portion and the feeding point, and (ii) at least partially within an in-between region between the patch portion and the high frequency circuit, wherein,
• a wavelength of a radio wave in an operating frequency of the zeroth-order resonance antenna is λ, and
• a distance of D between the patch portion and the metal body satisfies a relationship of 0<D<λ×½ in the plan view,
• whereby directivity of the zeroth-order resonance antenna is different from an extension direction of the feeder line.