US3867708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission system with cable for transmission of high frequency signals
Assignee: KM Kabelmetal AG
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Filing: 1973-10-04
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Granted: 1975-02-18
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Expires: 1993-10-04
Abstract
Abstract A signal conductor is wound on a soft magnetic core with stepfunction permeability and extending for the length of the transmission line. A control conductor is also wound on the core and passes a parametric pumping signal, for example, at double the frequency of the information signal carrier frequency, to obtain continuous signal amplification along the transmission line and cable offsetting inherent line attenuation as it tends to affect the propagating information signal.
Inventors
- 👤 Klaus Bretting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:26
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/36; H01; H01B; H01B11/00; H01B11/02; H01B11/12; H01B11/14; H04B3/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
In a signal transmission system with a transmitter for an information signal at a first frequency and a cable for transmitting the information signal, the improvement comprising: a magnetic core having magnetic permeability which exhibits a step; a first signal conductor wound on said core and connected to said transmitter; a second conductor wound also on said core; and a source for a control signal connected to said second conductor for magnetically biasing and controlling the core and having a d.c. biasing component and a variable component of a second frequency having amplitude and being adjusted in phase and frequency relative to the first frequency, so that the effective permeability of the core in any point thereof is reduced upon occurrence of an information signal peak and increased upon occurrence of information signal zero crossings.
Claim 2
Dependent Claim
135 words
In a signal transmission system with a transmitter for an information signal at a first frequency and a cable for transmitting the information signal, the improvement comprising: a magnetic core having magnetic permeability which exhibits a step; a first signal conductor wound on said core and connected to said transmitter; a second conductor wound also on said core; and a source for a control signal connected to said second conductor for magnetically biasing and controlling the core and having a d.c. biasing component and a variable component of a second frequency having amplitude and being adjusted in phase and frequency relative to the first frequency, so that the effective permeability of the core in any point thereof is reduced upon occurrence of an information signal peak and increased upon occurrence of information signal zero crossings.
Claim 3
Dependent Claim
29 words
In a signal transmission system as in claim 1, wherein the first signal conductor is the inner one of a coaxial high frequency cable, having also an outer conductor.
Claim 4
Dependent Claim
17 words
In a signal transmission system as in claim 2, wherein the outer conductor has an axial slot.
References Cited (Backward Citations)
US3012203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |