Patent ID: 8264411
Filing Date: 2012-09-11
Classification: H01Q

Abstract:
1. An antenna structure comprising: an antenna element including a dielectric base and a feeding radiation electrode defining an antenna; and a substrate including a ground region in which a ground electrode is provided and a non-ground region in which no ground electrode is provided; wherein the antenna element is supported by the substrate so that at least a portion of the antenna element is arranged in the non-ground region; the feeding radiation electrode includes an intermediate path that is connected to a feeding portion of the feeding radiation electrode for electrical conduction and that is arranged to extend in a perimeter direction on a side surface of the dielectric base adjacent to the non-ground region, and an open end side path that is arranged to extend along a loop path that extends from a termination of the intermediate path in a direction so as to separate from the intermediate path on a surface of the dielectric base and then return toward the intermediate path; an end of the open end side path is parallel or substantially parallel to and spaced apart from the intermediate path; the dielectric base includes a plurality of base portions including a base portion that includes a portion provided in a spaced region disposed between the parallel or substantially parallel open end and the intermediate path of the feeding radiation electrode; and the base portion that includes the portion provided in the spaced region disposed between the parallel or substantially parallel open end and the intermediate path is made of a dielectric material having a dielectric constant greater than dielectric constants of remaining portions of the plurality of base portions.