Patent ID: 8274442

Claim:
A slot antenna located on a substrate having a first surface and a second surface opposite to the first surface, the slot antenna comprising: a feeding portion located on the first surface of the substrate, to feed electromagnetic signals; and a radiating portion located on the second surface of the substrate and defining a sector-shaped slot, a first rectangle-shaped slot, a second rectangle-shaped slot, and a third rectangle-shaped slot, wherein the sector-shaped slot is defined by a first semidiameter, a second semidiameter, and an arc connected one by one; wherein the first rectangle-shaped slot, the second rectangle-shaped slot, and the third rectangle-shaped slot are commonly extended away from a center of the sector-shaped slot, and the second rectangle-shaped slot and the third rectangle-shaped slot are substantially symmetrical based on a symmetry axis of the sector-shaped slot; wherein a projection of the feeding portion on the second surface of the substrate overlaps with the first rectangle-shaped slot.