Patent US4358769A successfully refreshed from Google Patents.
US4358769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop antenna apparatus with variable directivity
Assignee: Sony Corp
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Filing: 1981-02-11
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Granted: 1982-11-09
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Expires: 2001-02-11
Abstract
Abstract A loop antenna apparatus is disclosed which includes a main conductive loop arranged on a first surface, a plurality of supplemental conductive loops connected to the main conductive loop and arranged on different surfaces from the first surface, respectively, a plurality of signal feeding points provided in different loops of the main and supplemental conductive loops, an output terminal and change-over switches for selectively connecting one of the plurality of signal feeding points to the output terminal.
Inventors
- 👤 Masahiro Tada
- 👤 Hirokazu Ichikawa
- 👤 Mitsuo Fukushima
- 👤 Koya Nakamichi
- 👤 Koji Ouchi
- 👤 Yoshio Ishigaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:33
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/24; H01Q3/247; H01Q7/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A loop antenna apparatus comprising: a main conductive loop arranged on a first flat surface; first and second supplemental conductive loops connected to said main conductive loop and arranged on second and third flat surfaces perpendicular to said first flat surface, respectively; third supplemental conductive loop connected to said first and second supplemental conductive loops and arranged on a fourth flat surface parallel to said first flat surface and perpendicular to said second and third flat surfaces; first and second signal feeding points provided in said main conductive loop and said first supplemental conductive loop, respectively; an output terminal; and means for selectively connecting one of said first and second feeding points to said output terminal.
Claim 2
Dependent Claim
116 words
A loop antenna apparatus comprising: a main conductive loop arranged on a first flat surface; first and second supplemental conductive loops connected to said main conductive loop and arranged on second and third flat surfaces perpendicular to said first flat surface, respectively; third supplemental conductive loop connected to said first and second supplemental conductive loops and arranged on a fourth flat surface parallel to said first flat surface and perpendicular to said second and third flat surfaces; first and second signal feeding points provided in said main conductive loop and said first supplemental conductive loop, respectively; an output terminal; and means for selectively connecting one of said first and second feeding points to said output terminal.
Claim 3
Dependent Claim
21 words
A loop antenna apparatus according to claim 1, wherein said first, second, third and fourth flat surfaces define a rectangular parallelepiped.
Claim 4
Dependent Claim
119 words
A loop antenna apparatus comprising: a top plate and a plurality of frames arranged to define a rectangular parallelepiped having six planes; a plurality of conductive plates mounted on said top plate and said plurality of frames near the peripheral portions of said six planes, said plurality of conductive plates forming a main conductive loop on a first plane of said six planes and a plurality of supplemental conductive loops formed on different planes of said six ones from said first plane; a plurality of signal feeding points provided in different loops of said main and supplemental conductive loops; an output terminal; and means for selectively connecting one of said plurality of signal feeding points to said output terminal.
Claim 5
Dependent Claim
119 words
A loop antenna apparatus comprising: a top plate and a plurality of frames arranged to define a rectangular parallelepiped having six planes; a plurality of conductive plates mounted on said top plate and said plurality of frames near the peripheral portions of said six planes, said plurality of conductive plates forming a main conductive loop on a first plane of said six planes and a plurality of supplemental conductive loops formed on different planes of said six ones from said first plane; a plurality of signal feeding points provided in different loops of said main and supplemental conductive loops; an output terminal; and means for selectively connecting one of said plurality of signal feeding points to said output terminal.
Claim 6
Dependent Claim
37 words
A loop antenna apparatus according to claim 3, wherein said top plate and said plurality of frames are designed to form a television stand and output signals from said output terminal are supplied to said television receiver.
References Cited (Backward Citations)
US2650303A
Cited
US4169265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |