Flipped lumped element circulator

Details Flipped lumped element circulator Flipped lumped element circulator

1997-02-11

1999-03-23

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Nonreciprocal gyromagnetic type

29830, 29846, H01P 1383

Patent

active

058865870

ABSTRACT:
A lumped element circulator is provided in addition to a method for producing and flip mounting the circulator to a substrate. The resonant elements of the circulator are connected in either a delta or Y configuration which produces a three port electrical circuit. The fabrication technique associated with this invention allows the lumped element circulator to be manufactured in either a crossover or non-crossover style circulator. The circulator includes a ferrite layer having three inductors formed on its top surface to create either the delta or Y resonant element configuration. Contact bumps are attached at the terminal locations of the inductors. A magnet is secured to the bottom of the ferrite layer, forming a ferrite wafer. Optionally, a dielectric layer is disposed between the ferrite and the magnet. A plurality of capacitors and mounting pads are formed on a separate substrate by printing metal strips thereon. Once the ferrite wafer and substrate components are fabricated, the ferrite wafer is flipped over and the contact bumps are secured to the mounting pads.

REFERENCES:
patent: 4259684 (1981-03-01), Dean et al.
patent: 5017894 (1991-05-01), Naito
patent: 5223805 (1993-06-01), Talcott et al.

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