Electronic device antenna

An antenna system, comprising:

• a dielectric substrate;
• first and second conductive traces on the dielectric substrate that are aligned along a common longitudinal axis;
• a coaxial cable having an outer conductor and an inner conductor, wherein the outer conductor is connected to the first conductive trace and the inner conductor is connected to the second conductive trace;
• a support structure to which the dielectric substrate is attached;
• and
• a grounding plate on which the support structure is mounted, wherein the coaxial cable outer conductor is electrically grounded to the grounding plate.

A portable computer, comprising:

• an optical disk drive;
• a metal portable computer base unit housing having an optical disk drive slot through which optical disks are loaded into the optical disk drive;
• and
• a dipole antenna mounted within the metal case that transmits and receives radio-frequency antenna signals through the optical disk drive slot.