US4885556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circularly polarized evanescent mode radiator
Assignee: Boeing Co
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Filing: 1988-11-01
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Granted: 1989-12-05
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Expires: 2008-11-01
Abstract
Abstract A nearly square waveguide below cutoff has a microstrip substrate disposed diagonally therein. A first shunt capacitance is provided by either a conductor formed on the microstrip substrate or a conductor disposed in the waveguide perpendicular to the microstrip substrate. A dielectric window is disposed in the end to provide a shunt capacitance at the opposite end of the waveguide.
Inventors
- 👤 Bernard J. Lamberty
- 👤 Steven J. Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:53
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/24; H01Q15/242; H01Q15/244; H01P; H01P1/00; H01P1/165; H01P1/17
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
53 words
An evanescent mode radiator comprising: a waveguide operating below its cutoff frequency; a dielectric substrate disposed diagonally in said waveguide; a first conductor disposed on a surface of said dielectric substrate; shunt capacitive means disposed in said waveguide adjacent said first conductor; and a dielectric window disposed in an end of said waveguide.
Claim 2
Dependent Claim
53 words
An evanescent mode radiator comprising: a waveguide operating below its cutoff frequency; a dielectric substrate disposed diagonally in said waveguide; a first conductor disposed on a surface of said dielectric substrate; shunt capacitive means disposed in said waveguide adjacent said first conductor; and a dielectric window disposed in an end of said waveguide.
Claim 3
Dependent Claim
12 words
The radiator of claim 1 wherein said waveguide is a rectangular waveguide.
Claim 4
Dependent Claim
17 words
The radiator of claim 2 wherein orthogonal sides of said rectangular waveguide are nearly equal in length.
Claim 5
Dependent Claim
20 words
The radiator of claim 1 wherein said shunt capacitive means comprises a conductive post disposed perpendicular to said dielectric substrate.
Claim 6
Dependent Claim
45 words
The radiator of claim 1 wherein said shunt capacitive means comprises: a first conductive post disposed perpendicular to a first wall of said waveguide; and a second conductive post disposed perpendicularly to a second wall of said waveguide and orthogonally to said first conductive post.
Claim 7
Dependent Claim
26 words
The radiator of claim 1 wherein said shunt means comprises a second conductor disposed on said surface of said dielectric substrate perpendicular to said first conductor.
Claim 8
Dependent Claim
55 words
An evanescent mode radiator comprising: a waveguide operating below its cutoff frequency; a dielectric substrate disposed diagonally in said waveguide; a first conductor disposed on and electrically coupled to a surface of said dielectric substrate; a conductive post disposed perpendicular to said dielectric substrate; and a dielectric window disposed in an end of said waveguide.
Claim 9
Dependent Claim
55 words
An evanescent mode radiator comprising: a waveguide operating below its cutoff frequency; a dielectric substrate disposed diagonally in said waveguide; a first conductor disposed on and electrically coupled to a surface of said dielectric substrate; a conductive post disposed perpendicular to said dielectric substrate; and a dielectric window disposed in an end of said waveguide.
Claim 10
Dependent Claim
12 words
The radiator of claim 7 wherein said waveguide is a rectangular waveguide.
Claim 11
Dependent Claim
17 words
The radiator of claim 8 wherein orthogonal sides of said rectangular waveguide are nearly equal in length.
Claim 12
Dependent Claim
79 words
An evanescent mode radiator comprising: a waveguide operating below its cutoff frequency; a dielectric substrate disposed diagonally in said waveguide; a first conductor disposed on and electrically coupled to a surface of said dielectric substrate; a first conductive post disposed perpendicular to a first wall of said waveguide; a second conductive post disposed perpendicularly to a second wall of said waveguide and orthogonally to said first conductive post; and a dielectric window disposed in an end of said waveguide.
Claim 13
Dependent Claim
79 words
An evanescent mode radiator comprising: a waveguide operating below its cutoff frequency; a dielectric substrate disposed diagonally in said waveguide; a first conductor disposed on and electrically coupled to a surface of said dielectric substrate; a first conductive post disposed perpendicular to a first wall of said waveguide; a second conductive post disposed perpendicularly to a second wall of said waveguide and orthogonally to said first conductive post; and a dielectric window disposed in an end of said waveguide.
Claim 14
Dependent Claim
12 words
The radiator of claim 10 wherein said waveguide is a rectangular waveguide.
Claim 15
Dependent Claim
17 words
The radiator of claim 11 wherein orthogonal sides of said rectangular waveguide are nearly equal in length.
Claim 16
Dependent Claim
70 words
An evanescent mode radiator comprising: a waveguide operating below its cutoff frequency; a dielectric substrate disposed diagonally in said waveguide; a first conductor disposed on a surface of said dielectric substrate and connected electrically to said waveguide; a second conductor disposed on said surface of said dielectric substrate perpendicular to said first conductor and connected electrically to said waveguide; and a dielectric window disposed in an end of said waveguide.
Claim 17
Dependent Claim
70 words
An evanescent mode radiator comprising: a waveguide operating below its cutoff frequency; a dielectric substrate disposed diagonally in said waveguide; a first conductor disposed on a surface of said dielectric substrate and connected electrically to said waveguide; a second conductor disposed on said surface of said dielectric substrate perpendicular to said first conductor and connected electrically to said waveguide; and a dielectric window disposed in an end of said waveguide.
Claim 18
Dependent Claim
12 words
The radiator of claim 13 wherein said waveguide is a rectangular waveguide.
Claim 19
Dependent Claim
17 words
The radiator of claim 14 wherein orthogonal sides of said rectangular waveguide are nearly equal in length.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |