Patent ID: 6292154
Filing Date: 2001-09-18
Classification: H01Q

Abstract:
An antenna device comprising radiation elements, feed means for feeding electric power to said radiation elements, a ground plate provided in electrically-spaced relation to said radiation elements, and a cover member covering said radiation elements and said feed means, said antenna device having at least one value defined as the ratio of H.div..LAMBDA. obtained by dividing a distance (H) in mm between said radiation elements and said ground plate by a wavelength (.LAMBDA.) in mm of at least one frequency transmitted or received by said antenna device, wherein:said wavelength (.LAMBDA.) is a value in the range 2000 mm to 2190 mm and said wavelength .LAMBDA. and said distance H satisfy the relation 1.div.250.ltoreq.H.div..LAMBDA..ltoreq.1.div.80, with the result that said distance H is a value in the range 8.76 mm to 25 mm.