Dual port antenna structure

A method of operating an antenna structure comprising a first port, a second port, and a single radiator connected to both the first and second ports, the method comprising:

• feeding a transmitted or received signal via the second port as a differential signal along two feedlines,
• wherein feeding the transmitted or received signal includes simultaneously transceiving in symmetrical and asymmetrical excited modes,
• wherein in the symmetrical excited mode current flows symmetrically through the single radiator to or from the first port, thereby causing the single radiator to resonate at a first resonant frequency,
• wherein in the asymmetrical excited mode in which current flows asymmetrically through the single radiator to or from the second port, thereby causing the single radiator to resonate at a second resonant frequency,
• wherein the single radiator comprises a first element that is elongate and linear, a second element that is elongate, linear and parallel to the first element, and arm connectors connecting the first element to the second element, and
• wherein the two feedlines of the second port are connected to the second element in a symmetrical arrangement.

A single radiator connected to both of first and second ports of an antenna structure configured to feed a transmitted or received signal via the second port as a differential signal along two feedlines of the second port, wherein the single radiator is configured to simultaneously transceive in symmetrical and asymmetrical excited modes,

• wherein in the symmetrical excited mode, current flows symmetrically through the single radiator to or from the first port, thereby causing the single radiator to resonate at a first resonant frequency, and
• wherein in the asymmetrical excited mode asymmetrically through the single radiator to or from the second port, thereby causing the single radiator to resonate at a second resonant frequency;
• the single radiator comprises an elongate and linear first element;
• the single radiator further comprises an elongate and linear second element that is parallel to the first element;
• and
• the single radiator still further comprises arm connectors connecting the first and second elements,
• wherein the two feedlines of the second port of the antenna structure are connected to the second element in a symmetrical arrangement.