Broadband two-port isolator

Details Broadband two-port isolator Broadband two-port isolator

H - Electricity

03

H

333/84

H03H 7/00 (2006.01) H01P 1/36 (2006.01)

Patent

CA 1069989

A BROADBAND TWO-PORT ISOLATOR ABSTRACT A non-reciprocal signal path for RF over a broadband frequency range is provided by an isolator comprising two coils or meshes positioned at 90° to each other adjacent at least one gyromagnetic or ferrite disc which is magnetically biased by a static magnetic field. Each coil is tuned by a parallel capacitor, each coil and capacitor having one end grounded to a surrounding electromagnetic shield. A resistive unilateralizing element is coupled between the input and output terminals and, being essentially non-reactive, provides the broadband characteristic. The energy from the reverse direction is dissipated externally in the resistive element. A magnetic return path of a high permeability material allows the use of smaller biasing magnets and reduces the effects of external magnetic fields.

274410

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