Impedance matching balun employing a ferrite core

• US 3,195,076 A
• Filed: 07/07/1961
• Issued: 07/13/1965
• Est. Priority Date: 07/07/1961
• Status: Expired due to Term

• Current Assignee: Heber J. Morrison
• Original Assignee: Heber J. Morrison
• Inventors: Morrison, Heber J.
• Application Number:
  US04/129,894
• Time in Patent Office: 1,467 Days
• US Class Current: 333/26
• CPC Class Codes: H03H 7/42 Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns

Claims

1. IN A TRANSMISSION SYSTEM FOR ELECTRIC CURRENTS OF HIGH FREQUENCY IN WHICH ENERGY FLOWS BETWEEN BALANCED AND UNBALANCED CIRCUITS, THE COMBINATION COMPRISING, FIRST CIRCUIT MEANS FOR CONVERTING A VOLTAGE WHICH IS UNBALANCED WITH RESPECT TO GROUND TO A VOLTAGE WHICH IS BALANCED WITH RESPECT TO GROUND COMPRISING A MAIN WINDING CONPRISING SEVERAL TURNS OF A COAXIAL LINE HAVING AN INNER CONDUCTOR AND AN OUTER CONDUCTOR, AN AUXILIARY WINDING HAVING THE SAME NUMBER OR CONDUCTOR TURNS AS SAID MAIN WINDING, AND A FIRST MAGNETIC CORE ON WHICH SAID MAIN WINDING AND SAID AUXILIARY WINDING ARE INDUCTIVELY DISPOSED, SAID FIRST MAGNETIC CORE BEING FORMED FROM FERRITE MAGNETIC MATERIAL TO REDUCE THE LOSSES IN SAID MAGNETIC CORE AT HIGHER FREQUENCIES;

SECOND CIRCUIT MEANS FOR MATCHING THE IMPEDANCE OF SAID BLANCED AND UNBALANCED CIRCUITS CONNECTED IN SERIES CIRCUIT RELATIONSHIP WITH SAID FIRST CIRCUIT MEANS AND COMPRISING SEVERAL ADDITIONAL WINDINGS OF BALANCED TRANSMISSION LINE, AT LEAST TWO OF SAID