Wave transmission lines and networks – Attenuators
Patent
1985-03-18
1987-06-02
LaRoche, Eugene R.
Wave transmission lines and networks
Attenuators
333246, H01P 122
Patent
active
046707239
ABSTRACT:
A broad band, thin film attenuator for microwave circuits is constructed by placing a ground plane conductor on one side of a ceramic, insulating substrate, and conductive, resistive, and reactive elements on the other side of the substrate. Capacitive stubs are provided to compensate for inductance in grounding conductors between resistance elements and the ground plane conductor. Constrictions are provided in input and output conductors to provide increased series inductance to compensate for distributed capacitance of the resistance elements. One resistance element is constructed so that the interface between the input conductor and that resistance element forms an obtuse interior angle with an adjoining transitional edge extending from the input conductor to the grounding conductor, and the transitional edge forms an obtuse interior angle with the adjoining edge of the grounding conductor, so as to minimize current density concentrations and distributed capacitance. A second resistance element is employed to achieve additional attenuation.
REFERENCES:
patent: 3521201 (1970-07-01), Veteran
patent: 3543197 (1970-11-01), Adam et al.
patent: 4011531 (1977-03-01), Gaudet
patent: 4408176 (1983-10-01), Rapeli et al.
Grellmann H. Erwin
Lockwood Larry R.
Roland Leonard A.
Birdwell William A.
Gray Francis I.
LaRoche Eugene R.
Lee Benny
Tektronix Inc.
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