Antenna apparatus

An antenna apparatus, comprising:

• a ground plane;
• a plurality of first patch antenna patterns arranged on a level higher than the ground plane and each configured to transmit and/or receive a first radio frequency signal of a first frequency;
• a plurality of second patch antenna patterns arranged on a level higher than the ground plane and each having a size smaller than a size of each of the plurality of first patch antenna patterns,
• wherein the plurality of second patch antenna patterns include feed patch antenna patterns configured to transmit and/or receive a second radio frequency signal of a second frequency different from the first frequency, and dummy patch antenna patterns which are not fed any of the first and second radio frequency signals, and
• wherein the plurality of second patch antennas are substantially the same size
• wherein one of the dummy patch antenna patterns is disposed between adjacent two first patch antenna patterns and between adjacent two feed patch antenna patterns in a plan view when viewed from a top of the antenna apparatus'