Patent ID: 6600448
Filing Date: 2003-07-29
Classification: G06F,H01Q

Abstract:
A flat-plate antenna, comprising:a conductive flat plate; a slit, which has a specified width and specified length, formed as part of the conductive flat plate, wherein horizontal conductive portions of said flat-plate antenna are separated from each other with said slit between them and serve as a radiating element portion and a ground portion respectively; a separate radiating portion which is electrically formed in a direction different from the length direction of said radiating element portion so that the separate radiating portion will include, as an integral part thereof, a conductive portion linking said radiating element portion and said ground portion, wherein power is radiated from said radiating element portion and said separate radiating portion respectively, and said radiating element portion has a length and said conductive flat plate has a length which are determined so that said conductive flat plate will exhibit predetermined excitation and predetermined directivity; and a power line, over which power is supplied to said flat-plate antenna, in contact with said radiating element portion and said ground portion and thus electrically coupled to said radiating element portion and said ground portion.