Wideband, High Isolation Two Port Antenna Array for Multiple Input, Multiple Output Handheld Devices
AssigneeBlackBerry Limited
InventorsMina Ayatollahi, Qinjiang Rao, Dong Wang
Life of this patent
Estimating the term…
Abstract
A multiple input-multiple output antenna assembly with high isolation between the antennas is disclosed. The antenna assembly includes a substrate with a ground layer at its surface. Two antennas are disposed opposing each other on the substrate. An isolation element in a form of a patterned slot is interposed between the first and second antennas on the ground plane. A first signal port is provided for applying a first signal to excite the first antenna and a second signal port is provided for applying a second signal to excite the second antenna. The isolation element provides isolation that inhibits electromagnetic propagation between the two antennas.
Claims15
1-16. (canceled)
An antenna assembly for a wireless communication device comprising:
- a ground plane;
- a first radiating element disposed in the ground plane;
- a second radiating element disposed in the ground plane and spaced apart from the first radiating element by at least one-tenth of a wavelength of a resonant frequency of the second radiating element;
- an isolating element interposed on the ground plane between the first radiating element and the second radiating element;
- wherein the isolating element comprising:
- a meandering slot through the ground plane between the first and the second radiating elements, wherein the meandering slot has a first leg that extends orthogonally inward from a location between the first and second radiating elements that is on a common edge of the ground plane, wherein the first leg has an inner end and the meandering slot further comprises a second leg extending from the inner end parallel to the common edge and toward the first radiating element terminating at a first remote end, a third leg projecting from the remote end and away from the common edge until terminating at a second remote end, and a fourth leg extending from the second remote end parallel to the common edge and toward the second radiating element.
Dependencies are inferred from the claim text.