Patent ID: 7423600

Claim:
A vehicular antenna apparatus comprising: a radiating conductor provided on the cabin-side glass surface of a vehicular window; a power feeding substrate having a power feeding pattern provided on one surface thereof, the power feeding pattern facing the radiating conductor with a space therebetween; a circuit substrate having a radio wave reflecting conductor layer provided on its almost entire opposing surface facing the other surface of the power feeding substrate, and a preamplifier circuit provided on the surface on the opposite side from the opposing surface; a connecting small substrate having a microstrip line and disposed between the circuit substrate and the power feeding substrate and substantially perpendicularly to both substrates; and a housing accommodating and holding the power feeding substrate, the circuit substrate, and the connecting small substrate, wherein one end of the microstrip line is connected to the preamplifier circuit, the other end is connected to the power feeding pattern, the power feeding pattern is electromagnetically coupled to the radiating conductor, and thereby indirect power feeding can be performed.