Patent ID: 7333060

Claim:
A planar antenna comprising: a radiating conductor and a grounding plate spaced from each other by a predetermined distance and oppositely arranged; and a matching portion in which a power supply portion for supplying power to said radiating conductor is arranged at one end of the matching portion, and another end of said matching portion is connected to said radiating conductor, wherein said matching portion is spaced apart from the ground plate and is arranged such that said power supply portion and said grounding plate are spaced from each other by a distance shorter than said predetermined distance, wherein said matching portion is arranged such that the distance between said matching portion and said grounding plate is gradually shortened from an end connected to said radiating conductor to an end having said power supply portion, and wherein a central conductor connected to said power supply portion, and a coaxial connector formed on a coaxial line path with said central conductor are arranged on an arranging side of said radiating conductor and said matching portion in said grounding plate.