BigPatents India

A device for feeding signals between a common line (10) and two or more ports (20-28). The device including a branched network of feedlines (1-18) coupling the common line with the ports. The feedlines have transformer portions (11,12,29) of varying width for reducing reflection of signals passing through the network. A dielectric member (47a,47b) is mounted adjacent to the network and can be moved to synchronously adjust the phase relationship between the common line and one or more of the ports. The dielectric member also has transformer portions (91,93) for reducing reflection of signals passing through the network. At least one of the junctions (69) of the network does not overlap with the dielectric member, or overlaps a region of reduced permittivity.