Patent ID: 8040288
Filing Date: 2011-10-18
Classification: H01Q

Abstract:
1. A system, comprising: a conductive enclosure, wherein the conductive enclosure includes a conductive cylinder having an open portion and a closed portion; a pair of perpendicularly-disposed dipole antennas, wherein each antenna of the pair of perpendicularly-disposed dipole antennas includes a pair of conductors extending through the closed portion of the conductive enclosure a first distance beyond the open portion of the conductive enclosure along a central axis of the conductive enclosure to a pair of tips disposed outside of the open portion of the conductive enclosure, and wherein each pair of tips extends from each pair of conductors at an acute angle of between forty and seventy degrees between each of the tips and the central axis of the conductive enclosure; and a hybrid coupler, the hybrid coupler having a pair of output terminals coupled to each pair of conductors of each antenna of the pair of perpendicularly-disposed dipole antennas, wherein the hybrid coupler is configured to apply signals of equal magnitude to the pair of perpendicularly-disposed dipole antennas that differ in phase by ninety degrees, wherein dimensions of the conductive cylinder and the pair of dipole antennas are proportional to a selected frequency, the dimensions including: