Coplanar antenna

A coplanar antenna including a conductive plane, wherein the length of the conductive plane along a first dimension is less than one-quarter of a wavelength of a resonant frequency; an insulating region within the conductive plane, wherein the insulating region is of a shape that outlines a conductive peninsula, wherein: the conductive peninsula is coupled to the conductive plane, the conductive peninsula is substantially coplanar to a major portion of the conductive plane, the conductive peninsula is operable to be electrically coupled to an electric feed circuit, and the conductive peninsula is operable to electrically couple a tunable inductance to the conductive plane after receiving a current from the electric feed circuit.