US4233577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat transmission path for communication system
Assignee: Italtel SpA
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Filing: 1979-06-11
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Granted: 1980-11-11
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Expires: 1999-06-11
Abstract
Abstract A transmission path for a pulse-type communication system comprises two flat outer conductors and one flat inner conductor separated from one another by layers of dielectric material such as Teflon. The maximum effective thickness of the conductors is on the order of magnitude of the penetration depth of the current. The stack of conductive and nonconductive layers is flanked by two ferrite strips of the same height as the stack and in contact therewith, these strips serving to gather the laterally emanating lines of force into closed loops alongside the stack. At least one of the strips may be subdivided into sections separated by gaps through which branch leads can extend into contact with the flat conductors.
Inventors
- 👤 Dalmazio Raveglia
- 👤 Carlo Lonati
- 👤 Giancarlo Macchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:19
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/32; H01; H01P; H01P3/00; H04J; H04J3/00; H04J3/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A transmission path for a communication system operating with pulsed signals, comprising: a flat elongate inner conductor and two flat elongate outer conductors bracketing said inner conductor, said inner and outer conductors being substantially coextensive in width, the effective thickness of each of said conductors in a common transverse plane being at most on the order of magnitude of the penetration depth of an alternating current at a frequency in the kHz range; two dielectric layers of substantially the same width as said conductors and of greater thickness than the latter separating said inner conductor from said outer conductors, thereby forming with said conductors a stack of substantially rectangular cross-section; and ferromagnetic elements alongside said stack for maintaining the lines of force of a magnetic field, generated by said pulse signals, substantially parallel to said conductors at the minor sides of said cross-section.
Claim 2
Dependent Claim
143 words
A transmission path for a communication system operating with pulsed signals, comprising: a flat elongate inner conductor and two flat elongate outer conductors bracketing said inner conductor, said inner and outer conductors being substantially coextensive in width, the effective thickness of each of said conductors in a common transverse plane being at most on the order of magnitude of the penetration depth of an alternating current at a frequency in the kHz range; two dielectric layers of substantially the same width as said conductors and of greater thickness than the latter separating said inner conductor from said outer conductors, thereby forming with said conductors a stack of substantially rectangular cross-section; and ferromagnetic elements alongside said stack for maintaining the lines of force of a magnetic field, generated by said pulse signals, substantially parallel to said conductors at the minor sides of said cross-section.
Claim 3
Dependent Claim
28 words
A transmission path as defined in claim 1 wherein said ferromagnetic elements extend across said outer conductors on both sides of said stack and in close contact therewith.
Claim 4
Dependent Claim
15 words
A transmission path as defined in claim 2 wherein said ferromagnetic elements are ferrite strips.
Claim 5
Dependent Claim
36 words
A transmission path as defined in claim 3 wherein at least one of said ferrite strips is longitudinally subdivided into sections separated by narrow gaps, further comprising branch leads connected to said conductors in said gaps.
Claim 6
Dependent Claim
19 words
A transmission path as defined in claims 1, 2, 3 or 4 wherein said dielectric layers consist of polytetrafluoroethylene.
References Cited (Backward Citations)
US3025480A
Cited
US3609613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |