US3573830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop antenna
Assignee: Sony Corp
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Filing: 1969-02-07
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Granted: 1971-04-06
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Expires: 1989-02-07
Abstract
Abstract In a directional loop antenna, particularly for television receivers, in which a pair of arcuate conductive members are mounted in opposed relation with their concave sides facing each other to define a loop, a dummy load is connected between two of the adjacent ends of the conductive members and output terminals are connected to the opposite adjacent ends, the conductive members are formed with relatively narrow end portions and relatively wide middle portions to increase the frequency band width and gain of the antenna.
Inventors
- 👤 Motomu Tadama
- 👤 Kosuke Akiba
- 👤 Toshitada Doi
- 👤 Masashi Mikkaichi
- 👤 Tetsuya Mori
- 👤 Risaburo Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:24
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A loop antenna comprising a pair of conductive members, each of said conductive members being arcuate and including a pair of elongated arcuate wirelike elements joined together at the opposite end portions of the respective conductive member and diverging from said end portions to the middle portion of the respective conductive member to vary the width of the latter in directions that are perpendicular to the direction of curvature thereof, means mounting said conductive members in opposed relationship with their concave sides facing toward each other to cooperate in defining a loop, each of said conductive members further including a generally U-shaped, sheet metal element having its ends joined to said wirelike elements of the respective arcuate conductive member adjacent said middle portion of the latter and directed inwardly from said wirelike elements toward the center of said loop, a dummy load connected between one end of one of said conductive members and the adjacent one end of the other of said members, and output means connected to the other ends of said conductive members.
Claim 2
Dependent Claim
175 words
A loop antenna comprising a pair of conductive members, each of said conductive members being arcuate and including a pair of elongated arcuate wirelike elements joined together at the opposite end portions of the respective conductive member and diverging from said end portions to the middle portion of the respective conductive member to vary the width of the latter in directions that are perpendicular to the direction of curvature thereof, means mounting said conductive members in opposed relationship with their concave sides facing toward each other to cooperate in defining a loop, each of said conductive members further including a generally U-shaped, sheet metal element having its ends joined to said wirelike elements of the respective arcuate conductive member adjacent said middle portion of the latter and directed inwardly from said wirelike elements toward the center of said loop, a dummy load connected between one end of one of said conductive members and the adjacent one end of the other of said members, and output means connected to the other ends of said conductive members.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |