Patent ID: 8952850
Filing Date: 2015-02-10
Classification: H01Q

Abstract:
1. A MIMO antenna apparatus comprising: a plurality of antenna devices each comprising an operation line extending parallel by a predetermined extension length from one end portion and configured to operate in a resonant frequency band when power is supplied; a main board divided into a device area in which the antenna devices are adjacently disposed and a ground area in which a ground plate configured to ground the antenna devices is mounted; a plurality of ground pads each extending from the ground plate to the device area in the main board, configured to connect the one end portion of each of the antenna devices to the ground plate, and separated by a predetermined distance; and a plurality of feeding pads configured to connect each of the antenna devices to the main board by electrically connecting to the main board and to provide power to each of the antenna devices, wherein at least one of the extension length and the separation distance is determined to make an amplitude of a signal transmitted into air from the antenna devices and an amplitude of a signal transmitted via the ground plate to be equal when the antenna devices operate.