Double-balanced mixer with triple-layer film transformers

Details Double-balanced mixer with triple-layer film transformers Double-balanced mixer with triple-layer film transformers

1991-05-23

1994-01-18

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455333, 333 25, H04B 126

Patent

active

052806472

ABSTRACT:
A multi-layered double-balanced mixer includes first and second transformers formed as first, second and third winding film layers separated by insulating films and stacked on one side of a substrate with first and second input/output electrode pairs connected to opposite ends of the second winding layers of the respective transformers. Diode electrodes of a four diode matrix are connected to one ends of the first and third winding layers. Third input/output electrodes are connected to second ends of the first and third winding layers of the first and second transformers. A film shield covers the first and second transformers and the diode matrix. First and second adjusting stubs are formed as film structures outside of the shield and are connected to a respective input/output electrodes of said first, second and third input/output electrodes for adjusting input impedances of the double-balanced mixer.

REFERENCES:
patent: 4293956 (1981-10-01), Alstatt
patent: 4755775 (1988-07-01), Marczewski et al.
patent: 5003622 (1991-03-01), Ma et al.

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