Patent ID: 8130165

Claim:
An electromagnetic transmission line arrangement with a phase shifter, comprising at least one conductive branch line extending from a junction point to an associated output port, for the propagation of electromagnetic signals in a high frequency band along said at least one branch line, at least one ground plane being located in parallel with but at a distance from said transmission line arrangement, said phase shifter including at least one dielectric body being movably mounted in a space between said ground plane and said at least one branch line and being movable in said space so as to achieve a variable phase shift and a controlled delay of said electromagnetic signals when propagating along said at least one branch line, said at least one dielectric body having a longitudinal extension between ends thereof which is longer than the width thereof and also longer than λ/4, λ being the wavelength of the electromagnetic wave propagating along said at least one branch line in the absence of any dielectric material, wherein said at least one longitudinally extending dielectric body is movable sideways in relation to said at least one branch line into a delaying position, where said at least one dielectric body at least partly covers and is parallel to said at least one branch line along the full length of said dielectric body, said at least one dielectric body has a selected, longitudinal distribution of dielectric material being adapted to cause, upon being moved sideways into said delaying position, a controlled phase shift but also to secure, by way of said selected longitudinal distribution of said dielectric material in conjunction with said at least one branch line, an input impedance matching of said transmission line arrangement, and wherein said at least one dielectric body is movable sideway between a neutral position having no influence on the signal propagating along said branch line, and said delaying position.