Patent US3646161A successfully refreshed from Google Patents.
US3703690A
Expired / Lapsed
US
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Dielectric waveguides
Assignee: Post Office
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Filing: 1970-12-15
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Granted: 1972-11-21
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Expires: 1990-12-15
Abstract
Abstract A dielectric waveguide for millimetric wavelengths comprising a core of polymer material supported by a body of foamed polymeric material and enclosed in a protective jacket.
Inventors
- 👤 Ivor Albert Ravenscroft
- 👤 Lynden Ashrooke Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
A dielectric rod waveguide for the transmission of electromagnetic energy at frequencies in the millimetric waveband, the waveguide comprising in combination a core through which a proportion but not all of said electromagnetic energy is transmitted, said core having a diameter lying within the range from about 0.5 lambda o to about 0.85 lambda o where lambda o is the free space wavelength of the electromagnetic energy to be transmitted and being of a polymeric material with a loss angle not greater than about 50 microradians, a core support body round the core through which substantially the balance of said electromagnetic energy is transmitted, the support body comprising a tubular body of polymeric material in foamed form and having a dielectric constant of substantially equal to unity and of a size such that the overall diameter of core and support body lies within the range from about 1.6 lambda o to about 5.0 lambda o, lossy material associated with said support body to absorb electromagnetic energy incident upon it, and, surrounding the core support, a jacket providing protection against mechanical stresses, the ingress of moisture and electrical screening.
Claim 2
Dependent Claim
188 words
A dielectric rod waveguide for the transmission of electromagnetic energy at frequencies in the millimetric waveband, the waveguide comprising in combination a core through which a proportion but not all of said electromagnetic energy is transmitted, said core having a diameter lying within the range from about 0.5 lambda o to about 0.85 lambda o where lambda o is the free space wavelength of the electromagnetic energy to be transmitted and being of a polymeric material with a loss angle not greater than about 50 microradians, a core support body round the core through which substantially the balance of said electromagnetic energy is transmitted, the support body comprising a tubular body of polymeric material in foamed form and having a dielectric constant of substantially equal to unity and of a size such that the overall diameter of core and support body lies within the range from about 1.6 lambda o to about 5.0 lambda o, lossy material associated with said support body to absorb electromagnetic energy incident upon it, and, surrounding the core support, a jacket providing protection against mechanical stresses, the ingress of moisture and electrical screening.
Claim 3
Dependent Claim
188 words
A dielectric rod waveguide for the transmission of electromagnetic energy at frequencies in the millimetric waveband, the waveguide comprising in combination a core through which a proportion but not all of said electromagnetic energy is transmitted, said core having a diameter lying within the range from about 0.5 lambda o to about 0.85 lambda o where lambda o is the free space wavelength of the electromagnetic energy to be transmitted and being of a polymeric material with a loss angle not greater than about 50 microradians, a core support body round the core through which substantially the balance of said electromagnetic energy is transmitted, the support body comprising a tubular body of polymeric material in foamed form and having a dielectric constant of substantially equal to unity and of a size such that the overall diameter of core and support body lies within the range from about 1.6 lambda o to about 5.0 lambda o, lossy material associated with said support body to absorb electromagnetic energy incident upon it, and, surrounding the core support, a jacket providing protection against mechanical stresses, the ingress of moisture and electrical screening.
Claim 4
Dependent Claim
188 words
A dielectric rod waveguide for the transmission of electromagnetic energy at frequencies in the millimetric waveband, the waveguide comprising in combination a core through which a proportion but not all of said electromagnetic energy is transmitted, said core having a diameter lying within the range from about 0.5 lambda o to about 0.85 lambda o where lambda o is the free space wavelength of the electromagnetic energy to be transmitted and being of a polymeric material with a loss angle not greater than about 50 microradians, a core support body round the core through which substantially the balance of said electromagnetic energy is transmitted, the support body comprising a tubular body of polymeric material in foamed form and having a dielectric constant of substantially equal to unity and of a size such that the overall diameter of core and support body lies within the range from about 1.6 lambda o to about 5.0 lambda o, lossy material associated with said support body to absorb electromagnetic energy incident upon it, and, surrounding the core support, a jacket providing protection against mechanical stresses, the ingress of moisture and electrical screening.
Claim 5
Dependent Claim
17 words
A dielectric rod waveguide as claimed in claim 1 in which the core is of stranded form.
Claim 6
Dependent Claim
17 words
A dielectric rod waveguide as claimed in claim 1 in which the core is of foamed form.
References Cited (Backward Citations)
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US2794959A
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US3040278A
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US3157726A
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US3386787A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |