US5227744A
Expired / Lapsed
US
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Transition element between electromagnetic waveguides, notably between a circular waveguide and a coaxial waveguide
Assignee: Orange SA
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Filing: 1991-07-16
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Granted: 1993-07-13
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Expires: 2011-07-16
Abstract
Abstract A transition element for electromagnetic waveguides of the type designed to provide for the transition between a circular waveguide and a coaxial waveguide, constituted by a circular external guide cooperating with an internal conductor forming an end portion of the central conductor of the coaxial waveguide, the internal conductor having at least one intermediate transition step with a substantially constant section throughout its length. The device can be applied notably to the making of two-band duplexers.
Inventors
- 👤 Christian Sabatier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:54
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/10; H01P5/103
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
187 words
A transition element for electromagnetic waveguides providing for the transition between a circular waveguide having a first circular conductor and a coaxial waveguide comprising a second circular conductor and a central conductor extending along a longitudinal axis, the central conductor having a predetermined radius, said transition element comprising: a circular external conductor having a first axial extremity configured to attach to said first circular conductor and a second axial extremity configured to attach to said second circular conductor; and an internal conductor having a first and second axial limit, the first axial limit of said internal conductor being attached to said central conductor of said coaxial waveguide, said internal conductor having at least one step, each said step having a first end and a second end spaced along said longitudinal axis, with one of the first and second ends of each step connected to one of the first and second ends of another step, the steps being interconnected to lie along said longitudinal axis, with each said step having a substantially constant cross-section and having a corresponding radius smaller than said predetermined radius of said central conductor.
Claim 2
Dependent Claim
187 words
A transition element for electromagnetic waveguides providing for the transition between a circular waveguide having a first circular conductor and a coaxial waveguide comprising a second circular conductor and a central conductor extending along a longitudinal axis, the central conductor having a predetermined radius, said transition element comprising: a circular external conductor having a first axial extremity configured to attach to said first circular conductor and a second axial extremity configured to attach to said second circular conductor; and an internal conductor having a first and second axial limit, the first axial limit of said internal conductor being attached to said central conductor of said coaxial waveguide, said internal conductor having at least one step, each said step having a first end and a second end spaced along said longitudinal axis, with one of the first and second ends of each step connected to one of the first and second ends of another step, the steps being interconnected to lie along said longitudinal axis, with each said step having a substantially constant cross-section and having a corresponding radius smaller than said predetermined radius of said central conductor.
Claim 3
Dependent Claim
31 words
A transition element according to claim 1, wherein both ends of each said step of said internal conductor has abrupt shoulders, the abrupt shoulders being substantially perpendicular to said longitudinal axis.
Claim 4
Dependent Claim
53 words
A transition element according to claim 1, wherein said internal conductor includes a conical portion having a base end and a point end, the base end being attached to one of said first and second ends of one of said at least one step, the point end being aligned along said longitudinal axis.
Claim 5
Dependent Claim
13 words
A transition element according to claim 3, wherein said point end is truncated.
Claim 6
Dependent Claim
39 words
A transition element according to claim 1 wherein said circular external conductor of the transition element has a narrowed cross-section portion with a diameter which is substantially smaller than a corresponding diameter of said first and second circular conductors.
Claim 7
Dependent Claim
111 words
A transition element according to claim 5, wherein said internal conductor has a first step having a constant circular cross-section of a first radius and a second step having a constant circular cross-section of a second radius greater than the first radius, one of said first and second ends of said second step corresponding to said first axial limit of said internal conductor and one of said first and second ends of said first step corresponding to said second axial limit of said internal conductor, and wherein said narrowed cross-section of said external conductor extends approximately from said first axial extremity up to a median portion of the second intermediate step.
Claim 8
Dependent Claim
74 words
A transition element according to claim 1, wherein said internal conductor comprises a first step having a circular cross-section of a first radius and a second step having a circular cross-section of a second radius greater than the first radius of said first end step, a first abrupt shoulder connecting the second step with said first step, and a second abrupt shoulder connecting the second step with said central conductor of said coaxial waveguide.
Claim 9
Dependent Claim
157 words
A transition element for electromagnetic waveguides providing for the transition between a circular waveguide having a first circular conductor and a coaxial waveguide having a central conductor and a second circular conductor, said central conductor extending along a longitudinal axis and having a predetermined radius, said transition element comprising: a circular external conductor having a first axial extremity configured to attach to said first circular conductor and a second axial extremity configured to attach to said second circular conductor; and an internal conductor having a first and a second axial limit, the first axial limit being attached to said central conductor of said coaxial waveguide, and having at least two interconnected steps extending in the direction of said longitudinal axis, each of the steps having a first end and a second end, each of the steps having a substantially constant circular cross-section of a corresponding radius smaller than said predetermined radius of said coaxial waveguide central conductor.
Claim 10
Dependent Claim
157 words
A transition element for electromagnetic waveguides providing for the transition between a circular waveguide having a first circular conductor and a coaxial waveguide having a central conductor and a second circular conductor, said central conductor extending along a longitudinal axis and having a predetermined radius, said transition element comprising: a circular external conductor having a first axial extremity configured to attach to said first circular conductor and a second axial extremity configured to attach to said second circular conductor; and an internal conductor having a first and a second axial limit, the first axial limit being attached to said central conductor of said coaxial waveguide, and having at least two interconnected steps extending in the direction of said longitudinal axis, each of the steps having a first end and a second end, each of the steps having a substantially constant circular cross-section of a corresponding radius smaller than said predetermined radius of said coaxial waveguide central conductor.
Claim 11
Dependent Claim
173 words
A transition element for electromagnetic waveguides providing for the transition between a circular waveguide having a first circular conductor and a coaxial waveguide having a central conductor of a predetermined radius extending along a longitudinal axis and a second circular conductor, said transition element comprising: a circular external conductor having a first axial extremity configured to attach to said first circular conductor and a second axial extremity configured to attach to said second circular conductor; and an internal conductor having a first and a second axial limit, the first axial limit configured to attach to said central conductor of said coaxial waveguide, the internal conductor comprising a first and a second step, each step having first and second axially separated ends, each step having a substantially constant circular cross-section of a corresponding radius smaller than said predetermined radius of said central conductor of said coaxial waveguide, the radius of the first step being smaller than the radius of the second step to define an abrupt shoulder connecting the first and the second steps.
Claim 12
Dependent Claim
173 words
A transition element for electromagnetic waveguides providing for the transition between a circular waveguide having a first circular conductor and a coaxial waveguide having a central conductor of a predetermined radius extending along a longitudinal axis and a second circular conductor, said transition element comprising: a circular external conductor having a first axial extremity configured to attach to said first circular conductor and a second axial extremity configured to attach to said second circular conductor; and an internal conductor having a first and a second axial limit, the first axial limit configured to attach to said central conductor of said coaxial waveguide, the internal conductor comprising a first and a second step, each step having first and second axially separated ends, each step having a substantially constant circular cross-section of a corresponding radius smaller than said predetermined radius of said central conductor of said coaxial waveguide, the radius of the first step being smaller than the radius of the second step to define an abrupt shoulder connecting the first and the second steps.
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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) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |