PLANAR BALUN TRANSFORMER DEVICE

摘要

An electric transformer device (balun) is formed on a support plate having a first base face and an opposite second base face. The balun includes a first port (40) connectable to an electrical line for a differential signal and a second port connectable to an electrical line for a single-ended signal. A first printed conductive track is associated to the first base face of the support plate for connecting the first port to the second port. A printed conductive path is associated to the second base face of the support plate for connecting the first port to the second port. The printed conductive path is formed of a symmetric second and third printed conductive tracks.

主权项

1. A method for manufacturing an electric transformer device to adapt an electrical line for differential signal to an electrical line for single-ended signal, comprising the steps of:
securing a first metal sheet on a first base face of a support plate; securing an opposite second metal sheet on a second base face of the support plate; said first and second metal sheet being connected to the respective base face substantially along the entire face surface; performing a selective chemical removal of the metal from said first and second metal sheet, said selective chemical removal:
shaping a first conductive track associated to said first base face of the support plate, andshaping a conductive path associated to said second base face of the support plate; providing for a first port and a second port of the transformer device that are connectable to the electrical line for differential signal and to the electrical line for single-ended signal, respectively; and connecting said first port to said second port via said first conductive track and said conductive path.