Transmit-receive isolation for a dual-polarized MIMO antenna array

An electronic device comprising:

• a multiple-input multiple-output (MIMO) antenna comprising:
• a substrate;
• a first antenna panel coupled on the substrate and comprising an array of first antenna elements;
• a second antenna panel coupled on the substrate and comprising an array of second antenna elements;
• and
• an antenna isolator coupled on the substrate, the antenna isolator comprising a plurality of walls extending outwardly from the substrate along a length of the substrate between the first antenna panel and the second antenna panel, the antenna isolator configured to reduce wave propagation between the array of first antenna elements and the array of second antenna elements, wherein the plurality of walls includes:
• a T-shaped wall configured to reduce horizontal diffraction that extends along the length of the substrate from a first end of the substrate to a second end of the substrate, and
• a first L-shaped wall positioned between the T-shaped wall and the first antenna panel that extends along the length of the substrate from the first end of the substrate to the second end of the substrate;
• TX processing circuitry coupled to the first antenna panel and configured to provide signals to the array of first antenna elements;
• and
• RX processing circuitry coupled to the second antenna panel and configured to receive signals from the array of second antenna elements.

A method of using an antenna, the method comprising:

• providing signals to a first antenna panel including an array of first antenna elements coupled to a substrate;
• receiving signals from a second antenna panel including an array of second antenna elements coupled to the substrate;
• and
• reducing wave propagation between the array of first antenna elements and the array of second antenna elements using an antenna isolator coupled on the substrate, the antenna isolator comprising a plurality of walls extending outwardly from the substrate along a length of the substrate between the first antenna panel and the second antenna panel, wherein the plurality of walls includes:
• a T-shaped wall configured to reduce horizontal diffraction that extends along the length of the substrate from a first end of the substrate to a second end of the substrate, and
• a first L-shaped wall positioned between the T-shaped wall and the first antenna panel that extends along the length of the substrate from the first end of the substrate to the second end of the substrate.