Patent ID: 7342550

Claim:
An antenna comprising: a metallic enclosure having a height dimension; at least two slotted openings formed along the metallic enclosure, including a proximate slotted opening and a distal slotted opening, wherein each slotted opening has a slotted opening length and a slotted opening width and the slotted opening length is at least twice as long as the slotted opening width is wide, and wherein the slotted opening width is less than one wavelength wide and the slotted opening width is within a half wavelength of the height dimension, the proximate slotted opening and the distal slotted opening are in parallel along a side of the enclosure; at least one probe feed at least partially within the enclosure and closer to the proximate slotted opening than to the distal slotted opening; and a slotted opening axis located midway between the distal slotted opening and the proximate slotted opening, wherein the probe feed is located approximately 0.25 wavelengths from the slotted opening axis.