Matching and isolating device comprising a ferrite circulator

Details Matching and isolating device comprising a ferrite circulator Matching and isolating device comprising a ferrite circulator

H - Electricity

01

P

333/2

H01P 1/387 (2006.01)

Patent

CA 1212731

A MATCHING AND ISOLATING DEVICE COMPRISING A FERRITE CIRCULATOR ABSTRACT A ferrite circulator is placed between a circuit to be matched and a connection point for performing the function of a directional isolator. In order to achieve matching of the circuit to be matched without any need to add a matching circuit of the parallel resonant type, advantage is taken of the fact that the access impedances of a ferrite circulator are comparable with those of parallel resonant circuits. The choice of the circulator is accordingly governed by the need to ensure that the impedance of its access which is coupled to the circuit to be matched corresponds as nearly as possible to the conjugate impedance of the circuit to be matched. If necessary, an impedance transformer such as a quarter-wave transformer which is not provided with a parallel resonant element can be inserted between the circuit to be matched and the circulator.

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