US3370295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doubly reflecting latticed antenna
Assignee: Nortel Networks Ltd
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Filing: 1965-03-29
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Granted: 1968-02-20
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Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Ernest S Kelsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:48
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/19; H01Q15/00; H01Q15/14; H01Q15/16; H01Q15/165; H01Q15/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
240 words
A DOUBLY REFLECTING ANTENNA COMPRISING A PLURALITY OF MAIN REFLECTOR LATTICE ELEMENTS, SPACED FROM ONE ANOTHER, POSITIONED SYMMETRICALLY WITH RESPECT TO A COMMON AXIS AT DIFFERENT DISTANCES, THEREFROM AND POSITIONED SO THAT EACH ELEMENT IS INTERSECTED SUBSTANTIALLY ALONG ITS CENTERLINE BY A FIRST POSITIONING SURFACE, THE SURFACE OF EACH OF SAID MAIN REFLECTOR LATTICE ELEMENTS DEFINING A CONE MAKING WITH SAID AXIS A CONICAL ANGLE, EACH SAID MAIN REFLECTOR LATTICE ELEMENT HAVING A CONICAL ANGLE PROVIDING ON SAID AXIS A FIRST COMMON FOCUS FOR ARAY PARALLEL TO SAID AXIS, A SUB-REFLECTOR LATTICE ELEMENT FOR EACH MAIN REFLECTOR LATTICE ELEMENT EACH SPACED FROM ONE ANOTHER, POSITIONED SYNMMETRICALLY WITH RESPECT TO SAID AXIS AND POSITIONED SO THAT EACH ELEMENT IS INTERSECTED SUBSTANTIALLY ALONG ITS CENTERLINE BY A SECOND POSITIONING SURFACE, THE SURFACE OF EACH OF SAID SUB-REFLECTOR LATTICE ELEMENT DEFINING A CONE MAKING WITH SAID AXIS A CONICAL ANGLE, EACH SAID SUB-REFLECTOR LATTICE ELEMENT BEING POSITIONED BETWEEN A RESPECTIVE MAIN REFLECTOR LATTICE ELEMENT AND SAID FIRST COMMON FOCUS, AND HAVING A CONICAL ANGLE ORIENTING THE REFLECTING SURFACE THEREOF FOR REFLECTING RAYS REFLECTED BY SAID RESPECTIVE MAIN REFLECTOR LATTICE ELEMENT FROM AXIALLY PARALLEL RAYS TO A SECOND COMMON FOCUS ON SAID AXIS, AND ANTENNA FEED MEANS POSITIONED AT SAID SECOND FOCUS, SAID FIRST AND SECOND SURFACES BEING SO SHAPED THAT THE LENGTH OF EACH DOUBLY REFLECTED RAY PATH BETWEEN SAID ANTENNA FEED MEANS AND A PLANE NORMAL TO SAID AXIS IS A CONSTANT.
Claim 2
Dependent Claim
240 words
A DOUBLY REFLECTING ANTENNA COMPRISING A PLURALITY OF MAIN REFLECTOR LATTICE ELEMENTS, SPACED FROM ONE ANOTHER, POSITIONED SYMMETRICALLY WITH RESPECT TO A COMMON AXIS AT DIFFERENT DISTANCES, THEREFROM AND POSITIONED SO THAT EACH ELEMENT IS INTERSECTED SUBSTANTIALLY ALONG ITS CENTERLINE BY A FIRST POSITIONING SURFACE, THE SURFACE OF EACH OF SAID MAIN REFLECTOR LATTICE ELEMENTS DEFINING A CONE MAKING WITH SAID AXIS A CONICAL ANGLE, EACH SAID MAIN REFLECTOR LATTICE ELEMENT HAVING A CONICAL ANGLE PROVIDING ON SAID AXIS A FIRST COMMON FOCUS FOR ARAY PARALLEL TO SAID AXIS, A SUB-REFLECTOR LATTICE ELEMENT FOR EACH MAIN REFLECTOR LATTICE ELEMENT EACH SPACED FROM ONE ANOTHER, POSITIONED SYNMMETRICALLY WITH RESPECT TO SAID AXIS AND POSITIONED SO THAT EACH ELEMENT IS INTERSECTED SUBSTANTIALLY ALONG ITS CENTERLINE BY A SECOND POSITIONING SURFACE, THE SURFACE OF EACH OF SAID SUB-REFLECTOR LATTICE ELEMENT DEFINING A CONE MAKING WITH SAID AXIS A CONICAL ANGLE, EACH SAID SUB-REFLECTOR LATTICE ELEMENT BEING POSITIONED BETWEEN A RESPECTIVE MAIN REFLECTOR LATTICE ELEMENT AND SAID FIRST COMMON FOCUS, AND HAVING A CONICAL ANGLE ORIENTING THE REFLECTING SURFACE THEREOF FOR REFLECTING RAYS REFLECTED BY SAID RESPECTIVE MAIN REFLECTOR LATTICE ELEMENT FROM AXIALLY PARALLEL RAYS TO A SECOND COMMON FOCUS ON SAID AXIS, AND ANTENNA FEED MEANS POSITIONED AT SAID SECOND FOCUS, SAID FIRST AND SECOND SURFACES BEING SO SHAPED THAT THE LENGTH OF EACH DOUBLY REFLECTED RAY PATH BETWEEN SAID ANTENNA FEED MEANS AND A PLANE NORMAL TO SAID AXIS IS A CONSTANT.
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |