Ring hybrid mixing

Details Ring hybrid mixing Ring hybrid mixing

1985-02-08

1987-01-13

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455330, H04B 126

Patent

active

046370684

ABSTRACT:
A hybrid ring mixer includes an annular conducting ring on a gallium arsenide substrate coated on the bottom with a conducting layer to comprise a strip transmission line. Three conductors spaced by 120.degree. extend radially outward from the annular ring to define local oscillator, signal input and i-f ports, respectively. A pair of conductors spaced by substantially 120.degree. extend radially inward to comprise diode ports. A conducting surface inside the annular ring is grounded and has circular sectors of different radius bounded by radii extending from the center of the ring and bisecting the signal and local oscillator ports, respectively. The sector of larger radius is located in the 120.degree. sector between the signal and local oscillator ports. Mesa diodes are connected between each of the diode ports and the sector of smaller radius. A via opening surrounded by a conducting layer extends between the bottom and top of the substrate to establish conducting contact between the bottom conducting layer and the grounded conducting surface. The circuit is formed by diffusing n+ and n epitaxial layers into the substrate, etching through the end layer and depositing a cathode ohmic contact on the n+ layer, establishing an anode contact on the n layer, metalizing the substrate upper surface to form the circuit, etching through the bottom of the substrate to form the via opening and plating the back side of the substrate and the region around the via opening.

REFERENCES:
patent: 3534267 (1970-10-01), Hyltin
patent: 3619787 (1971-11-01), Salzberg
patent: 4008438 (1977-02-01), Shinkawa et al.

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