Patent ID: 8797227

Claim:
An antenna, comprising: a housing having a shallow cavity; a substantially disk-shaped and substantially flat radiating element disposed in the shallow cavity, the radiating element having an arc-shape slot, the arc-shaped slot comprising a first straight end, a second straight end, an outer arc-shaped edge, and an inner arc-shaped edge the slot having a length substantially greater than a width of the slot, the radiating element further comprising a first tuning stub associated with a the first end of the a slot and a second tuning stub associated with the second end of the slot, the first and second tuning stubs each comprising extensions from the radiating element circumferentially aligned with an outer perimeter of the radiating element and in the same plane as the radiating element, the extensions forming partial slots near the first and second ends of the slot; a substantially circular parasitic element parallel to and spaced apart from the radiating element, the parasitic element being substantially disk-shaped and substantially flat.