Window glass apparatus for vehicle

A window glass apparatus for a vehicle comprising:

• a glass plate for a vehicle;
• a first bus bar provided in or on the glass plate and including an upper portion extending in a direction along an upper edge of the glass plate;
• a second bus bar provided in or on the glass plate and including a lower portion extending in a direction along a lower edge of the glass plate;
• and
• an antenna disposed in a space near the upper portion and configured to transmit and receive a radio wave having a certain frequency;
• wherein the glass plate has a heating area extending between the upper portion and the lower portion, and a non-heating area extending above the upper portion;
• wherein the heating area is an area where a conductive member is disposed, the conductive member being configured to flow a direct current in an up-down direction by applying the direct voltage between the first bus bar and the second bus bar by a power supply such that the heating area is heated by heat generation of the conductive member;
• wherein the antenna has a conductor spaced apart from the glass plate and opposed to the glass plate;
• wherein there is a gap between the conductor and the upper portion as viewed in a horizontal direction from a vehicle interior side;
• and
• wherein the following formula is satisfied:
• (¼)×λ≤D
• wherein the antenna is configured to transmit and receive a radio wave having a wavelength λ in air, and the gap has a length D in a vertical direction.