PURPOSE: To make it possible to obtain a voltage gain throughout a wide band, by using three or more parallel lines or twist lines for the transmission line type widing to constitute a distributor and synthesizer having a voltage gain.

CONSTITUTION: n-Number parallel lines or n-number twist lines are wound in two holes of the spectacles-type ferrite core. In respect to the winding method, winding end and winding start parts of (n-1)-number lines are connected successively to form winding start parts 2 and 4 and winding end parts 3' and 6', and windinding start parts 2 and 5 of (n-1)-number lines out of two pair of windings wound in respective holes are connected to each other and winding start parts 1 and 4 of the one rest line are connected to each other ro form an input end, and parts 3' and 6' of (n-)-number lines are connected to each other to form a common end, and winding ends 1' and 4' of one rest line are made into two output ends; otherwise, the end of part 3' of (n-1)-number lines and end 4' of the rest part of the other winding are connected to each other to form the common terminal and end 1' of one rest winding and part 6' of (n-1)-number lines of the other winding are made into two output ends. If n-number lines are used, the voltage gain of (n-1)-nnmber times is obtained.