Patent ID: 8766869
Filing Date: 2014-07-01
Classification: H01Q

Abstract:
1. An antenna apparatus comprising: a ground substrate; and a loop antenna having a frame with two intersecting elements creating first and second polarized wave surfaces, wherein the substrate provides an antenna, which is excited and vibrated together with the loop antenna, wherein the antenna has a first polarized wave component in parallel to the first polarized wave surface and a second polarized wave component in parallel to the second polarized wave surface, wherein a polarized wave ratio between the first polarized wave component and the second polarized wave component in the substrate is substantially equal to a polarized wave ratio between the first polarized wave surface and the second polarized wave surface in the loop antenna, wherein the first polarized wave surface is perpendicular to the second polarized wave surface, wherein the substrate has a rectangular shape with four sides, wherein two sides of the substrate are in parallel to the first polarized wave surface, and other two sides of the substrate are in parallel to the second polarized wave surface, and wherein a length of each sides of the substrate is determined based on a predetermined relationship between the polarized wave ratio of the substrate and the length of each side of the substrate so that the polarized wave ratio of the substrate is substantially equal to the polarized wave ration of the loop antenna.