A disk antenna for use in a PCMCIA card or the like having disk made from conventional moldable plastics and a radiating element that has a low capacitive impedance relative to the inductance of the antenna feed such that the tuning element is capacitive. The disk antenna maximizes the ratio of bandwidth to disk size by maximizing the surface area of the radiating element. The antenna is application specific in that it can be adapted for various environmental resonant variations.
