Patent ID: 6218998
Filing Date: 2001-04-17
Classification: H01Q

Abstract:
An electromagnetic antenna comprising:(a) a continuous conductor comprising a first length portion and a second length portion, said first and second length portions each having a first end and a second end, said first end of said first length portion connected to said second end of said second length portion at a first node, said second end of said first length portion connected to said first end of said second length portion at a second node;(b) a generalized toroid having a major axis and a minor axis, said continuous conductor extending in a generalized helical pattern as a single closed circuit around and over the surface of said generalized toroid, said generalized helical pattern of said first length portion of said continuous conductor having a first helical pitch sense and extending around said major axis for a first plurality of turns, said generalized helical pattern of said second length portion of said continuous conductor having a second helical pitch sense and extending around said major axis for a second plurality of turns, said first and second pluralities equal, said first helical pitch sense being opposite to said second helical pitch sense, said first and second length portions of said continuous conductor insulated from one another and overlapping one another, whereby said first and second nodes are in proximate location to one another and collectively constitute a port;(c) a signal feed operatively connected to said port, and(d) first and second signal terminals operatively connected to said signal feed.