公开(公告)号：AT271263T

公开(公告)日：2004-07-15

申请号：AT01403159

申请日：2001-12-07

Applicant: CIT ALCATEL

Inventor： MCDONALD NOEL ,  WILLIAMS CHARLIE G

IPC: H01P1/18 ,  H01Q3/36

Abstract: A phase shifting element for controllably varying the phase of signals of desired frequencies or frequency range passing along an adjacent transmission line section associated with, for example, an antenna array to electrically down-tilt the array's electromagnetic wave pattern. The phase shifting element includes a planar dielectric member having at least three discrete co-planar interactive segments extending from an edge thereof and arranged to movably overlap or intersect or interleave the transmission line section to vary its effective electrical length. Optimum dimensions of each interactive segment and optimum widths of gaps defined by facing edges of adjacent segments are determined by a computer optimisation program, such that the phase shifting element achieves a wide operating frequency range and minimum aggregate signal reflection.