Patent ID: 9634387
Date: 2017-04-25
CPC Classifications: H01P,H01Q

Claim:
1. A multiple-input multiple-output antenna, comprising: a printed circuit board having a plurality of edges, the printed circuit board comprising a ground layer, the ground layer comprising; a plurality of antenna element mounting locations, at least one of the plurality of antenna element mounting locations being arranged on a first side of the printed circuit board and at least one of the plurality of antenna element mounting locations being arranged on a second side of the printed circuit board; a plurality of slots comprising dielectric material in a plane of the ground layer, each of the plurality of slots extending a predetermined electrical length from an edge of the printed circuit board; and at least one ground stub, the at least one ground stub comprising an extension of the ground layer of a predetermined electrical length at a predetermined angle relative to the edge of the printed circuit board; and a plurality of dipole antenna elements comprising a balun substantially parallel to a plane of the printed circuit, each of the plurality of antenna elements mounted to the printed circuit board using one of the plurality of antenna element mounting locations, wherein each of the plurality of antenna elements is mounted above the plane of the printed circuit board and less than ¼λ above the plane of the printed circuit board, where λ is an operating frequency of the antenna.