Patent ID: 6181298
Filing Date: 2001-01-30
Classification: H01Q

Abstract:
A top fed quadrafilar helical antenna comprising:at least two printed circuit boards, each board having:a first feed network located on a front side of the board and substantially parallel and adjacent to a first side of a longitudinal axis of the boarda second feed network located on a back side of the board and substantially parallel and adjacent to a second side of the longitudinal axis of the boarda first horizontal arm extending from the longitudinal axis to a first outer edge of the board, said first arm being located on the front side of the boarda second horizontal arm extending from the longitudinal axis to a second outer edge, said second arm being located on the back side of the board anda slot located substantially collinear with the longitudinal axis of the boardand a plurality of linear conductors whereineach feed network is connected to a proximal or inner end of a horizontal armeach linear conductor is connected to a distal or outer end of a horizontal armeach linear conductor is wound around the outer edges of the at least two printed circuit boards in a helical mannereach printed circuit board is crossed with at least one other printed circuit board by interlocking their respective slots.