Patent ID: 7990330

Claim:
A slot antenna positioned on a substrate, comprising: a grounding portion positioned on the substrate; a symmetrically octagonal-shaped radiating portion, defining along a continuous outside edge of the radiating portion, a first, a second, a third, and a fourth right-angle trapezoidal shaped slot; wherein the first slot is located in place of a first corner of the symmetrically octagonal-shaped radiating portion, the second slot is located in place of a second corner, which is immediately adjacent to the first corner, and the first and second slots are separated by only a first side of the octagonal-shaped radiating portion; wherein the third and fourth slots are located on corners of a second side located directly opposite the first side, wherein the four slots and symmetrically octagonal-shaped radiating portion is symmetric about at least two lines bisecting the symmetrically octagonal-shaped radiating portion, wherein the two lines are orthogonal; wherein the radiating portion is parallel along a Y-axis to the grounding portion so as to form a gap between the radiating portion and the grounding portion; and a feeding portion electronically connecting the radiating portion to the grounding portion, for feeding electromagnetic signals to the slot antenna.