Patent ID: 6567051
Filing Date: 2003-05-20
Classification: H01Q

Abstract:
A method of adjusting a fixed beam elevation in a cellular base station telecommunication system, the system having a panel antenna adapted to mount a plurality of vertically spaced radiating elements, the method comprising:providing a differential electromechanical phase shifter having a transmission line section coupled to said radiating elements, and a transmission line input which is moveable relative to said transmission line section to differentially adjust physical path lengths of transmission line outputs to said coupled radiating elements; operatively linking a first controller to said electromechanical phase shifter; operatively coupling a second controller to said first controller from a location remote from said first controller; and employing said first and second controllers and from the location of said second controller effecting controlled movement of said transmission line input relative to said transmission line section to adjust the beam from a first fixed elevation to a second fixed elevation.