Microwave integrated circuit frequency translating apparatus

Details Microwave integrated circuit frequency translating apparatus Microwave integrated circuit frequency translating apparatus

1993-02-23

1994-03-01

Hellner, Mark

Communications: directive radio wave systems and devices (e.g.,

Radar ew

Ecm

342 13, 342 15, G01S 738

Patent

active

052912019

ABSTRACT:
A microwave integrated circuit for frequency translation includes a pair of mixers for receiving the input RF signal, mixing it with a pair of quadrature frequency modulation signals and by combining the output of the mixers in a quadrature coupler, suppressing all signals except for the input RF signal plus the modulation frequency. This is accomplished in an environment of high "g" forces, significant temperature variations and a need for high reliability and fast operation by a miniaturized microwave integrated circuit having microstrips on the top and bottom sides of a ceramic substrate. The mixers consist of quad diode chips which are compression welded to one side of the microstrip for good resistance to high "g" forces. Suitable balancing is provided by use of a ground plane on the opposite side with tapering. A quadrature coupler to suppress the lower sideband is in the form of a LANGE coupler which is effectively integrated on the top side of the substrate.

REFERENCES:
patent: 4083004 (1978-04-01), Cohn
patent: 4713662 (1987-12-01), Wiegand
patent: 4876546 (1989-10-01), Koerner
patent: 5003312 (1991-03-01), Madni et al.
"Multioctave, Double-Balanced Mixers designed using MIC Technology", Ram Mohan Narayanan, MSNGCT Jan. 1987.

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