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US3582833A
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Stripline thin-film resistive termination wherein capacitive reactance cancels out undesired series inductance of resistive film
Assignee: AT&T Inc
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Filing: 1969-12-23
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Granted: 1971-06-01
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Expires: 1989-12-23
Abstract
Abstract A thin-film resistive termination is presented for impedance matching microwave strip lines over a broad frequency band with a leaf spring connecting the resistor to the upper ground plane of the termination. The leaf spring is sloped along the length of the resistive film to produce a distributed capacitance which compensates for the series inductance of the resistive film.
Inventors
- 👤 Ronald W Kordos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:47
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/24; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01P1/26; H01P1/268
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A microwave stripline termination comprising, a pair of spaced ground plane conductors which are substantially parallel, an elongated center conductor mounted on a member of dielectric material and positioned substantially midway between said ground plane conductors, a resistive layer mounted on said dielectric member and having one end conductively connected to said center conductor and the other end conductively connected to a conductive pad, and means for producing a distributed capacitance gradient along said resistive layer comprising a resilient conductive member extending from said pad in the direction of said center conductor.
Claim 2
Dependent Claim
92 words
A microwave stripline termination comprising, a pair of spaced ground plane conductors which are substantially parallel, an elongated center conductor mounted on a member of dielectric material and positioned substantially midway between said ground plane conductors, a resistive layer mounted on said dielectric member and having one end conductively connected to said center conductor and the other end conductively connected to a conductive pad, and means for producing a distributed capacitance gradient along said resistive layer comprising a resilient conductive member extending from said pad in the direction of said center conductor.
Claim 3
Dependent Claim
30 words
The termination of claim 1, wherein the resistance of said resistive layer is substantially equal to the characteristic impedance of the strip transmission line in which said termination is contained.
Claim 4
Dependent Claim
31 words
The termination of claim 1, wherein the capacitive reactance of said distributed capacitance gradient substantially equals the series inductive reactance of said resistive layer to produce a substantially purely resistive termination.
Claim 5
Dependent Claim
81 words
The termination of claim 1, wherein furcated contacting branches of said resilient conductor member extend to a plurality of contacting points on one of said ground plane conductors in the longitudinal region of said conductive pad and longitudinally removed from said conductive pad in the direction of said center conductor, each of said contacting branches having a contacting lip in contact with said one ground plane to establish intimate electrical contact between said one ground plane conductor and said contacting lip.
References Cited (Backward Citations)
US2901711A
Cited
US3324424A
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 |