US4604627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flared microwave feed horns and waveguide transitions
Assignee: Commscope Technologies LLC
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Filing: 1984-01-11
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Granted: 1986-08-05
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Expires: 2004-01-11
Abstract
Abstract A horn-reflector antenna comprising a paraboloidal reflector for transmitting and receiving microwave energy, and a flared feed horn for guiding microwave energy to and from the reflector, the longitudinal shape of at least a section of the horn at the end where the horn begins to flare outwardly being defined by the equation ##EQU1## where R is the transverse dimension from the longitudinal axis of the horn to the side wall of the horn 1 is the axial distance along the horn measured from the end where the horn begins to flare outwardly, R 1 and R 2 are the radii of the horn at opposite ends of the horn section defined by the equation, L is the axial length of the horn section defined by the equation, and the exponent p has a value greater than two and less than about 7, to effect a substantial reduction in the TM 11 mode level.
Inventors
- 👤 Saad S. Saad
- 👤 Charles M. Knop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:29
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/12; H01Q19/13; H01Q19/132; H01P; H01P1/00; H01P1/16; H01P5/00; H01P5/02; H01P5/022; H01P5/024; H01Q13/00; H01Q13/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
154 words
A horn-reflector antenna comprising a paraboloidal reflector for transmitting and receiving microwave energy, and a flared feed horn for guiding microwave energy to and from said reflector, the longitudinal shape of at least a section of said horn at the end where the horn begins to flare outwardly being defined by the equation ##EQU5## where R is the transverse dimension from the longitudinal axis of the horn to the side wall of the horn, l is the axial distance along the horn measured from said end where the horn begins to flare outwardly, R 1 and R 2 are the radii of the horn at opposite ends of the horn section defined by said equation, L is the axial length of the horn section defined by said equation, and the exponent p has a value greater than two and less than about 7, to effect a substantial reduction in the TM 11 mode level.
Claim 2
Dependent Claim
154 words
A horn-reflector antenna comprising a paraboloidal reflector for transmitting and receiving microwave energy, and a flared feed horn for guiding microwave energy to and from said reflector, the longitudinal shape of at least a section of said horn at the end where the horn begins to flare outwardly being defined by the equation ##EQU5## where R is the transverse dimension from the longitudinal axis of the horn to the side wall of the horn, l is the axial distance along the horn measured from said end where the horn begins to flare outwardly, R 1 and R 2 are the radii of the horn at opposite ends of the horn section defined by said equation, L is the axial length of the horn section defined by said equation, and the exponent p has a value greater than two and less than about 7, to effect a substantial reduction in the TM 11 mode level.
Claim 3
Dependent Claim
59 words
A horn-reflector antenna as set forth in claim 1 wherein said exponent p has a value sufficiently greater than two that said antenna has a TM 11 mode level substantially below the TM 11 mode level of the same antenna with a hyperbolic (p=2) longitudinal shape along the length L between the radii R 1 and R 2 .
Claim 4
Dependent Claim
40 words
A horn-reflector antenna as set forth in claim 2 wherein said antenna has, at 6 GHz, a TM 11 mode level at least 5 dB below the TM 11 mode level of the same antenna with a hyperbolic longitudinal shape.
Claim 5
Dependent Claim
20 words
A horn-reflector antenna as set forth in claim 1 wherein the exponent p has a value of at least 2.5.
Claim 6
Dependent Claim
20 words
A horn-reflector antenna as set forth in claim 1 wherein the exponent p has a value greater than about 2.5.
Claim 7
Dependent Claim
25 words
A horn-reflector antenna as set forth in claim 1 wherein the exponent p has a value within the range from about 4 to about 6.7.
Claim 8
Independent Claim
172 words
A method of reducing the TM 11 mode level in a horn reflector antenna having a paraboloidal reflector for transmitting and receiving microwave energy, and a smooth-walled, flared feed horn for guiding microwave energy to and from said reflector, said method comprising shaping a section of said horn at the end where the horn begins to flare outwardly so that the inside wall of said section is defined by the equation ##EQU6## where R is the transverse dimension from the longitudinal axis of the horn to the side wall of the horn, l is the axial distance along the horn measured from said end where the horn begins to flare outwardly, R 1 and R 2 are the radii of the horn at opposite ends of the horn section defined by said equation, L is the axial length of the horn section defined by said equation, and the exponent p has a value greater than two and less than about 7, to effect a substantial reduction in the TM 11 model level.
Claim 9
Independent Claim
172 words
A method of reducing the TM 11 mode level in a horn reflector antenna having a paraboloidal reflector for transmitting and receiving microwave energy, and a smooth-walled, flared feed horn for guiding microwave energy to and from said reflector, said method comprising shaping a section of said horn at the end where the horn begins to flare outwardly so that the inside wall of said section is defined by the equation ##EQU6## where R is the transverse dimension from the longitudinal axis of the horn to the side wall of the horn, l is the axial distance along the horn measured from said end where the horn begins to flare outwardly, R 1 and R 2 are the radii of the horn at opposite ends of the horn section defined by said equation, L is the axial length of the horn section defined by said equation, and the exponent p has a value greater than two and less than about 7, to effect a substantial reduction in the TM 11 model level.
Claim 10
Dependent Claim
58 words
A method as set forth in claim 7 wherein said exponent p has a value sufficiently greater than two that said antenna has a TM 11 mode level substantially below the TM 11 mode level of the same antenna with a hyperbolic (p=2) longitudinal shape along the length L between the radii R 1 and R 2 .
Claim 11
Dependent Claim
39 words
A method as set forth in claim 8 wherein said antenna has, at 6 GHz, a TM 11 mode level at least 5 dB below the TM 11 mode level of the same antenna with a hyperbolic longitudinal shape.
Claim 12
Dependent Claim
19 words
A method as set forth in claim 7 wherein the exponent p has a value of at least 2.5.
Claim 13
Dependent Claim
19 words
A method as set forth in claim 7 wherein the exponent p has a value greater than about 2.5.
Claim 14
Dependent Claim
24 words
A method as set forth in claim 7 wherein the exponent p has a value within the range from about 4 to about 6.7.
References Cited (Backward Citations)
US3662393A
Cited
US4442437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |