Patent ID: 9190726
Filing Date: 2015-11-17
Classification: H01Q

Abstract:
1. A multimode antenna structure for transmitting and receiving electromagnetic signals in a communication device, the communication device comprising circuitry for processing signals communicated to and from the multimode antenna structure, the multimode antenna structure comprising: a plurality of antenna ports for coupling to the circuitry; a plurality of antenna elements, each operatively coupled to a different one of the antenna ports; and a plurality of coupling elements for electrically coupling to neighboring antenna elements of the plurality of antenna elements, wherein electrical currents on one antenna element of the plurality of antenna elements flow to the neighboring antenna elements and substantially bypass the plurality of antenna ports coupled to the neighboring antenna elements such that an antenna mode excited by one of the plurality of antenna ports is substantially electrically isolated from a mode excited by another one of the plurality of antenna ports at a given desired signal frequency range, wherein at least one antenna element of the plurality of antenna elements comprises branches of different lengths to create resonance at different frequencies.