Patent ID: 8063847
Filing Date: 2011-11-22
Classification: H01Q

Abstract:
1. A multi-band antenna that operates in non-harmonically related frequency bands, such antenna comprising: a primary antenna element for a first frequency band of the non-harmonically related bands, said primary antenna element extending from a ground plane printed circuit board, the primary antenna element electrically isolated from the ground plane, first and second portions of said primary antenna element disposed on first and second interleaved printed circuit boards, respectively; a plurality of secondary antenna elements extending from the ground plane parallel to the primary antenna element and arranged in a circle with the plurality of secondary antenna elements each capacitively coupled to the primary antenna element and ground plane so as to electrically float between an electrical potential of the primary antenna element and ground plane, first and second portions of said plurality of secondary antenna elements disposed on said first and second interleaved printed circuit boards, respectively; and a plurality of antenna elements for a second frequency band of the non-harmonically related bands, said plurality of second frequency band antenna elements electrically isolated from the ground plane and extending parallel to the primary and secondary antenna elements, the plurality of second frequency band antenna elements arranged in a circle that surrounds the secondary antenna elements with the primary element disposed at the center of both circles, first and second portions of said plurality of second frequency band antenna elements disposed on said first and second interleaved printed circuit boards, respectively, wherein the first portions of said primary antenna element, said plurality of secondary antenna elements, and said plurality of second frequency band antenna elements are aligned in a straight line on the first interleaved printed circuit board, and wherein the second portions of said primary antenna element, said plurality of secondary antenna elements, and said plurality of second frequency band antenna elements are aligned in a straight line on the second interleaved printed circuit board.