1. IN COMBINATION, A TWO-ELEMENT TRANSMISSION LINE COMPRISING A PLURALITY OF SECTIONS, EACH SECTION COMPRISING A FIRST WIRE AND A SECOND WIRE WOUND TOGETHER, SAID WIRES BEING CONTIGUOUS AND PARALLEL FROM A FIRST END OF EACH TO A SECOND END OF EACH TO FORM A PAIR OF COILS, SAID COILS BEING SERIALLY CONNECTED WITH THE SECOND END OF THE FIRST WIRE CONNECTED TO THE FIRST END OF THE SECOND WIRE; SAID SECTIONS BEING CONNECTED TIN CASCADE WITH THE SECOND ENDS OF SAID FIRST AND SECOND WIRES OF EACH SECTION EXCEPT THE LAST CONNECTED TO THE FIRST ENDS OF THE CORRESPONDING WIRES OF THE NEXT FOLLOWING SECTION; COMNECTIONS FOR APPLYING AN INPUT BETWEEN THE FIRST END OF THE FIRST WIRE OF THE FIRST SECTION AND SECOND END OF ONE OF THE WIRES OF ONE OF THE SECTIONS, AND CONNECTIONS FOR AN OUTPUT BETWEEN THE FIRST END OF THE FIRST WIRE OF THE FIRST SECTION AND THE SECOND END OF THE OF THE WIRES OF ONE OF THE SECTIONS.