Multimode antenna structure

An antenna structure, comprising:

• a plurality of antenna ports;
• a plurality of pairs of antenna elements, wherein each of the pairs of antenna elements is coupled to a different one of the plurality of antenna ports, wherein each of the plurality of pairs of antenna elements operates in a frequency range, and wherein each pair of the plurality of pairs of antenna elements has first and second antenna elements of different lengths;
• and
• one or more connection elements electrically coupling the plurality of pairs of antenna elements, wherein electrical currents on one of the plurality of pairs of antenna elements flow to a neighboring one of the plurality of pairs of antenna elements, wherein the electrical currents have a magnitude such that a first antenna mode excited by one of the plurality of antenna ports is at least substantially electrically isolated from a second antenna mode excited by another one of the plurality of antenna ports at a desired signal frequency range.

A device comprising:

• a substrate;
• and
• a printed circuit on the substrate, wherein the printed circuit comprises:
• a plurality of antenna ports;
• a plurality of antenna elements, wherein each of the plurality of antenna elements is coupled to a different one of the plurality of antenna ports, wherein each of the plurality of antenna elements operates in a frequency range;
• and
• one or more connection elements electrically coupling the plurality of antenna elements, wherein electrical currents on one of the plurality of antenna elements flow to a neighboring one of the plurality of antenna elements, wherein the electrical currents have a magnitude such that a first antenna mode excited by one of the plurality of antenna ports is at least substantially electrically isolated from a second antenna mode excited by another one of the plurality of antenna ports at a desired signal frequency range.