US3623110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop antenna with spaced impedance elements
Assignee: Sony Corp
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Filing: 1969-09-09
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Granted: 1971-11-23
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Expires: 1989-09-09
Abstract
Abstract In a directional antenna, particularly for television receivers, in which a loop antenna element consists of at least three arcuate conductive members, output terminals are connected between two of the adjacent ends of the conductive members and impedance means are connected between the other adjacent ends of the conductive members so as to determine the distribution of a current flowing to the antenna element.
Inventors
- 👤 Toshitada Doi
- 👤 Kosuke Akiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:54
CPC Classifications
H; H01; H01Q; H01Q23/00; H01Q7/00; H01Q7/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A directional antenna comprising a loop antenna element including a plurality of arcuate conductive members arranged in a ring and shaped to provide relatively narrow portions at first diametrically opposed locations and relatively wide portions at second diametrically opposed locations at right angles to said first locations, said conductive members having adjacent ends thereof spaced apart at said first and second locations, output terminal means connected to the adjacent spaced ends of said conductive members at one of said first locations, impedance means connected between the adjacent ends of said conductive members at the other of said first locations to serve as a dummy load, and further impedance means at said second locations to determine the distribution of current flow in said antenna element.
Claim 2
Dependent Claim
124 words
A directional antenna comprising a loop antenna element including a plurality of arcuate conductive members arranged in a ring and shaped to provide relatively narrow portions at first diametrically opposed locations and relatively wide portions at second diametrically opposed locations at right angles to said first locations, said conductive members having adjacent ends thereof spaced apart at said first and second locations, output terminal means connected to the adjacent spaced ends of said conductive members at one of said first locations, impedance means connected between the adjacent ends of said conductive members at the other of said first locations to serve as a dummy load, and further impedance means at said second locations to determine the distribution of current flow in said antenna element.
Claim 3
Dependent Claim
14 words
A directional antenna as in claim 1, in which said conductive members are wirelike.
Claim 4
Dependent Claim
35 words
A directional antenna as in claim 1, further comprising a second antenna element connected to the first-mentioned antenna element and being resonant with a frequency different from the resonance frequency of said first antenna element.
Claim 5
Dependent Claim
38 words
A directional antenna as in claim 3, in which trap means are connected between said first and second antenna elements to prevent the flow of current in said second antenna element except due to resonance of the latter.
Claim 6
Dependent Claim
17 words
A directional antenna as in claim 3, in which said second antenna element is a dipole antenna.
Claim 7
Dependent Claim
15 words
A directional antenna as in claim 5, in which said dipole antenna is telescopically adjustable.
References Cited (Backward Citations)
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |