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US3582842A Expired / Lapsed US ⏱️ 0.0 years remaining

Resistive film card attenuator for microwave frequencies

Assignee: SAGE LABORATORIES
•
Filing: 1969-08-28
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Granted: 1971-06-01
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Expires: 1989-08-28
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Abstract

Abstract A microstrip attenuator includes a ground plane and a signal conductor supported on a dielectric material above the ground plane. The signal conductor is interrupted for a portion of its length. A circular conductor having a diameter less than the length of interruption is placed on the dielectric with its center at the center of the gap between the portions of the signal conductor. Resistive material of predetermined resistivity is deposited on the dielectric extending from the circular conductor to the edges of signal conductors. Each deposition defines a sector of a circle with the transverse extremities thereof extending radially from the circular conductor. The longitudinal extremities are determined by arcs extending from the center of the circular conductor to the conductors and the circular conductor periphery. Shunt resistive elements are formed by depositing material of predetermined resistivity on the dielectric extending from the circular conductor in a direction essentially transverse of the direction of propagation. Likewise, the shunt resistive configuration defines a sector of a circle extending from the circular conductor to a second conductor essentially maintained at ground plane potential.

Inventors

  • 👤 David S Friedman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 08:38
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/22; H01P1/227

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 87 words
A microwave resistance comprising, TEM waveguide means, said TEM waveguide means including signal conductor means having a gap between portions thereof, and at least one reference conductor means, insulating means within said TEM waveguide means, a first resistive means supported by said insulating means in said gap coupled to one of said portions of said signal conductor means, a first conducting means supported by said insulating means coupled to said first resistive means and positioned in said gap, said first resistive means substantially defining an annular sector.
Claim 2
Dependent Claim 87 words
A microwave resistance comprising, TEM waveguide means, said TEM waveguide means including signal conductor means having a gap between portions thereof, and at least one reference conductor means, insulating means within said TEM waveguide means, a first resistive means supported by said insulating means in said gap coupled to one of said portions of said signal conductor means, a first conducting means supported by said insulating means coupled to said first resistive means and positioned in said gap, said first resistive means substantially defining an annular sector.
Claim 3
Dependent Claim 33 words
A microwave resistance in accordance with claim 1, wherein said first conducting means includes relatively thin circular-shaped conducting means supported by said insulating means and positioned substantially in the center of said gap.
Claim 4
Dependent Claim 68 words
A microwave resistance in accordance with claim 2 and further comprising second resistive means and second conducting means, said second conducting means being coupled to said reference conductor means, said second resistive means supported by said insulating means and intercoupling said first conducting means with said second conducting means over an area substantially defining an annular sector extending from said first conducting means to said second conducting means.
Claim 5
Dependent Claim 22 words
A microwave resistance in accordance with claim 3, wherein said first and second resistive means include resistive areas of substantially equal resistivity.
Claim 6
Dependent Claim 51 words
A microwave resistance in accordance with claim 2 and further comprising, a third resistive means supported by said insulating means in said gap coupled to the other of said portions of said signal conductor means and coupled to said first conducting means, said third resistive means substantially defining an annular sector.
Claim 7
Dependent Claim 68 words
A microwave resistance in accordance with claim 3 and further comprising, fourth resistive means and third conducting means, said third conducting means being coupled to said reference conductor means, said fourth resistive means supported by said insulating means and intercoupling said first conducting means with said third conducting means over an area substantially defining an annular sector extending from said first conducting means to said third conducting means.
Claim 8
Dependent Claim 51 words
A microwave resistance in accordance with claim 6 and further comprising, a third resistive means supported by said insulating means in said gap coupled to the other of said portions of said signal conductor means and coupled to said first conducting means, said third resistive means substantially defining an annular sector.
Claim 9
Dependent Claim 22 words
A microwave resistance in accordance with claim 7, wherein said first and third resistive means include resistive areas of substantially equal resistivity.
Claim 10
Dependent Claim 23 words
A microwave resistance in accordance with claim 7, wherein the angular boundaries of said annular sectors are essentially determined by an exponential taper.
Claim 11
Dependent Claim 28 words
A microwave resistance in accordance with claim 2, wherein said first conducting means includes means conductively coupling with the other of said portions of said signal conductor means.

References Cited (Backward Citations)

US2147717A Cited
US2434560A Cited
US2587055A Cited
US2629166A Cited
US2994049A Cited
US3325763A Cited
US3354412A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-05-31 1974-11-30 1975-06-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-05-31 1978-11-30 1979-06-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-05-31 1982-11-30 1983-06-01 $7700.00 Window Closed / Lapsed

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