Patent ID: 9059504
Filing Date: 2015-06-16
Classification: H01Q

Abstract:
1. A built-in antenna apparatus of a mobile terminal, the mobile terminal including a main board having at least one feeding portion for feeding RF power and a plurality of grounding portions at ground potential, the antenna apparatus comprising: a first metal plate and a second metal plate configured to be stacked on the main board and spaced from each other, wherein the second metal plate is electrically connected to the feeding portion and has a length sufficient to resonate in which the first metal plate and the second metal plate have a resonance characteristic for operation together where two rails harmonize, the two rails comprising one elongated conductor of the first metal plate and one elongated conductor from the second metal plate extending in parallel, and the first metal plate is electrically connected to the plurality of grounding portions and electromagnetically coupled with the second metal plate to resonate, a plurality of grounding terminals that extend from the first metal plate to be in contact with a respective grounding portion of the plurality of grounding portions, wherein each of the first metal plate and the second metal plate has a respective first portion, in which the first portion of the first metal plate overlays the first portion of the second metal plate in a region with a same pattern, and at least one of the first metal plate or second metal plate has a second portion extending away from the overlaying region, and wherein the second portion extending away from the overlaying region has a straight part and a curved part in which the curved part is further away from the overlaying region than the straight part.