US4129841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiating cable having spaced radiating sleeves
Assignee: KM Kabelmetal AG
•
Filing: 1977-08-15
•
Granted: 1978-12-12
•
Expires: 1997-08-15
Abstract
Abstract A regular, radiating coaxial transmission line is improved by covering it with an insulating coating; similar, cylindrical, radiating elements are equidistantly placed on the line and at a center-to-center distance equal to the wavelength of the center frequency of the h.f. band as transmitted in and through the line.
Inventors
- 👤 Helmut Hildebrand
- 👤 Gerhard Dunker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:54
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/203
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
Radiating high frequency cable having an inner conductor, an outer conductor and a spacer made of dielectric material disposed and configured so as to establish a concentric relation between the inner and the outer conductors, the outer conductor being constructed to radiate high frequency energy as transmitted through the cable, the improvement comprising: an insulative envelope on the outer conductor; and a plurality of radiating elements made of electrically conductive material and placed on the envelope in axially spaced apart relation to each other, each of the elements having an axial length not larger than half the wavelength of the radiated energy at a particular frequency of a radiated band, the elements having an axial center-to-center distance equal to the wavelength of the energy at said frequency and as transmitted through the cable.
Claim 2
Dependent Claim
133 words
Radiating high frequency cable having an inner conductor, an outer conductor and a spacer made of dielectric material disposed and configured so as to establish a concentric relation between the inner and the outer conductors, the outer conductor being constructed to radiate high frequency energy as transmitted through the cable, the improvement comprising: an insulative envelope on the outer conductor; and a plurality of radiating elements made of electrically conductive material and placed on the envelope in axially spaced apart relation to each other, each of the elements having an axial length not larger than half the wavelength of the radiated energy at a particular frequency of a radiated band, the elements having an axial center-to-center distance equal to the wavelength of the energy at said frequency and as transmitted through the cable.
Claim 3
Dependent Claim
14 words
The improvement as in claim 1, said elements being sleeves being made of metal.
Claim 4
Dependent Claim
10 words
The improvement as in claim 2, said metal being copper.
Claim 5
Dependent Claim
15 words
The improvement as in claim 1, said elements being made of a non-metallic conductive material.
Claim 6
Dependent Claim
10 words
The improvement as in claim 1, said elements being sleeves.
Claim 7
Dependent Claim
12 words
The improvement as in claim 5, said sleeves enclosing the cable circumferentially.
References Cited (Backward Citations)
US4053835A
Cited
US3963999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |