CM type directional coupler

Details CM type directional coupler CM type directional coupler

1992-03-30

1993-08-03

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333112, 336175, H01P 518

Patent

active

052333183

ABSTRACT:
A CM type directional coupler comprises a body having a dielectric layer, an annular magnet buried in the dielectric layer, a pair of transmission lines juxtaposed with a predetermined spacing between them in a magnetic area enclosed by the magnetic ring in the dielectric layer, and lead terminals extending from opposite ends of each of the transmission lines to outside of the dielectric layer, and all these elements are formed integrally with each other to provide a single device. Therefore, a large coupling factor and directivity are ensured, and the coupler can be designed very compact. This directional coupler can be manufactured with a highly improved yield and mass-producibility, so it is very suitably usable as a power detector in a portable telephone.

REFERENCES:
patent: 2701335 (1955-02-01), Sargeant et al.
patent: 3413574 (1968-11-01), Schroeder
patent: 3678341 (1972-07-01), Constable

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