Directional high frequency broadband transformer made by printed

Details Directional high frequency broadband transformer made by printed Directional high frequency broadband transformer made by printed

1987-12-29

1989-03-28

Gensler, Paul

Telecommunications

Interference signal transmission

333116, 333136, 455289, H04H 102, H01P 516

Patent

active

048171891

ABSTRACT:
A directional H.F. broadband transformer made by a printed circuit technique includes an insulating support carrying a two-hole ferrite core. A planar coil arrangement includes two web spirals wound around outer legs of the core and each being coupled to an elongated web arranged in the same plane and passing through a corresponding hole of the core. The two elongated webs are formed with an input terminal, an output terminal and a tap terminal of equal impedance. An isolated conductive layer mounted above the webs on the insulating support is capacitively coupled with the coil arrangement and with a ground layer to reduce values of series connected distributed capacitors resulting between respective webs and the ground layer.

REFERENCES:
patent: 3465274 (1969-09-01), Proctor
patent: 4012703 (1977-03-01), Chamberlayne
patent: 4201965 (1980-05-01), Onyshkevych

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