Patent US3975733A successfully refreshed from Google Patents.
US3975733A
Expired / Lapsed
US
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Transmitting antenna employing radial fins
Assignee: BOGNER BROADCAST EQUIPMENT Co
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Filing: 1974-11-22
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Granted: 1976-08-17
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Expires: 1994-11-22
Abstract
Abstract A transmitting antenna assembly comprises elementary driven antenna elements and generally radially extending fins mounted on a conventional supporting structure to obtain an omnidirectional or other desired antenna pattern, even for supporting structures of relatively large transverse dimensions.
Inventors
- 👤 Richard D. Bogner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:09
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/28; H01Q13/00; H01Q13/20; H01Q19/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
162 words
An antenna assembly for transmitting signals of a given wavelength comprising: a. an electrically conductive supporting structure extending along a longitudinal axis and having a major transverse dimension such as to affect the pattern of a signal transmitted by the antenna assembly; b. a driven antenna element carried by said supporting structure; c. a longitudinally extending forward reflecting fin of a generally rectangular outline having a longitudinal dimension between 0.12 λ and 1.0 λ and a transverse dimension between 0.2 λ and 0.9 λ positioned less than 0.5 wavelength in front of said driven antenna element on the side thereof opposite the said supporting structure for rearwardly directing at least a portion of the energy radiated by said driven element; and d. at least one elongated electrically conductive rearward slow wave propagating device radially extending from said supporting structure and in electrical contact therewith throughout its length arranged to receive a portion of the energy directed by said longitudinally extending reflecting fin.
Claim 2
Dependent Claim
162 words
An antenna assembly for transmitting signals of a given wavelength comprising: a. an electrically conductive supporting structure extending along a longitudinal axis and having a major transverse dimension such as to affect the pattern of a signal transmitted by the antenna assembly; b. a driven antenna element carried by said supporting structure; c. a longitudinally extending forward reflecting fin of a generally rectangular outline having a longitudinal dimension between 0.12 λ and 1.0 λ and a transverse dimension between 0.2 λ and 0.9 λ positioned less than 0.5 wavelength in front of said driven antenna element on the side thereof opposite the said supporting structure for rearwardly directing at least a portion of the energy radiated by said driven element; and d. at least one elongated electrically conductive rearward slow wave propagating device radially extending from said supporting structure and in electrical contact therewith throughout its length arranged to receive a portion of the energy directed by said longitudinally extending reflecting fin.
Claim 3
Dependent Claim
15 words
The antenna assembly of claim 1 including a plurality of said slow wave propagating devices.
Claim 4
Dependent Claim
44 words
The antenna assembly of claim 1 including a plurality of radially extending electrically conductive fins, said fins having an outward edge in the range of 0.1 to 0.3 wavelength from said supporting member and a length in the range of 0.12 to 1 wavelength.
Claim 5
Dependent Claim
23 words
The antenna assembly of claim 3 wherein said plurality of fins are spaced from 0.1 to 0.5 wavelength apart at their outer edges.
Claim 6
Dependent Claim
28 words
The antenna assembly of claim 4 wherein said fins have first and second planar portions intersecting along a line parallel to the longitudinal axis of said supporting structure.
Claim 7
Dependent Claim
20 words
The antenna assembly of claim 1 wherein said forward fin terminates in planar portions directed rearwardly toward said supporting member.
Claim 8
Dependent Claim
12 words
The antenna assembly of claim 1 wherein said forward fin comprises rods.
Claim 9
Dependent Claim
13 words
The antenna assembly of claim 1 wherein said forward fin comprises a mesh.
Claim 10
Dependent Claim
18 words
The antenna assembly of claim 1 wherein said forward fin comprises rods terminating in a vertical conductive member.
Claim 11
Dependent Claim
12 words
The antenna assembly of claim 1 wherein said rearward fin comprises rods.
Claim 12
Dependent Claim
13 words
The antenna assembly of claim 1 wherein said rearward fin comprises a mesh.
Claim 13
Dependent Claim
18 words
The antenna assembly of claim 1 wherein said rearward fin comprises rods terminating in a vertical conductive member.
Claim 14
Dependent Claim
13 words
The apparatus of claim 1 having a plurality of said driven antenna elements.
References Cited (Backward Citations)
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US3587108A
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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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |