Patent ID: 6680704
Filing Date: 2004-01-20
Classification: H01Q

Abstract:
An antenna apparatus for a portable communications device, said antenna apparatus comprising:a patch radiator member; a ground-plane back-up element for said patch radiator member; and a feed arrangement connecting said patch radiator member to radio circuitry in said portable communications device, wherein said patch radiator member includes an inner patch portion and an outer patch portion that are spaced from and substantially parallel to one another and that define a first open slot between first edges of said inner and outer patch portions, and a metallic wall portion connecting second edges of the inner and outer patch portions that are opposed to said first edges, said metallic wall portion extending along substantially an entire length of said second edges of the inner and outer patch portions and reflecting a wave propagating toward said metallic wall portion and feeding the reflected wave toward the first open slot with a 180 degree phase reversal.