US3772619A
Expired / Lapsed
US
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Low-loss waveguide transmission
Assignee: Commscope Technologies LLC
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Filing: 1971-06-04
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Granted: 1973-11-13
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Expires: 1991-06-04
Abstract
Abstract High-frequency signals are transmitted with very low energy loss in corrugated generally circular waveguide employing the hybrid HE11 mode of transmission. Guide parameters for production of lowest losses are described.
Inventors
- 👤 P Clarricoats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:49
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01P; H01P3/00; H01P3/12; H01P3/127; H01Q13/0208
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
40 words
In the propagation of energy over distances greater than approximately 200 wavelengths in imperfectly-conducting metallic waveguide, the improvement for reduction of wall-loss attenuation comprising propagating the energy through generally circular corrugated waveguide of such length in the hybrid HE11 mode.
Claim 2
Dependent Claim
40 words
In the propagation of energy over distances greater than approximately 200 wavelengths in imperfectly-conducting metallic waveguide, the improvement for reduction of wall-loss attenuation comprising propagating the energy through generally circular corrugated waveguide of such length in the hybrid HE11 mode.
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein the corrugated waveguide has a ratio of the inner radius to the radius in grooves forming the corrugations between approximately 0.65 and approximately 0.8 to discriminate against higher propagation modes.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein the inner radius of the waveguide is between 0.67 and 1.3 wavelengths.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the corrugations of the guide are of a depth between 0.28 and 0.38 wavelength.
Claim 6
Dependent Claim
22 words
The method of claim 4 wherein the corrugations of the guide are formed by grooves of width between one-third and one-fifth wavelength.
Claim 7
Dependent Claim
17 words
The method of claim 5 wherein adjacent grooves are spaced by less than one-eighth the groove width.
Claim 8
Dependent Claim
31 words
The method of claim 6 wherein the ratio of the inner radius of the waveguide to the radius in the grooves forming the corrugations is between approximately 0.65 and approximately 0.8.
Claim 9
Dependent Claim
11 words
The method of cLaim 7 wherein said ratio is approximately 0.7.
Claim 10
Dependent Claim
36 words
A generally circular finite-conductivity metallic waveguide for low-loss hybrid HE11 transmission having closely spaced internal grooves of depth between one-quarter and one-half its inner radius and of a length exceeding one hundred times its inner diameter.
Claim 11
Dependent Claim
36 words
A generally circular finite-conductivity metallic waveguide for low-loss hybrid HE11 transmission having closely spaced internal grooves of depth between one-quarter and one-half its inner radius and of a length exceeding one hundred times its inner diameter.
Claim 12
Dependent Claim
20 words
The waveguide of claim 9 wherein the spacing between adjacent grooves is less than one-eighth the width of the grooves.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |