US3680134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop antenna with spaced impedance elements
Assignee: Sony Corp
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Filing: 1971-07-21
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Granted: 1972-07-25
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Expires: 1991-07-21
Abstract
Abstract A directional antenna comprises a pair of semi-circular antenna members arranged to form a loop, each of the antenna members includes arcuate upper and lower wire-like conductive elements which are at a small distance from each other, at the middle of the respective antenna member, and at a relatively large distance from each other at the ends of the antenna member, and interconnecting elements are connected to the upper and lower conductive elements at the ends of each antenna member, and are preferably integral wire-like extensions of the upper and lower elements. Output terminals are connected to one of the antenna members at the narrow portion thereof, and an impedance acting as a dummy load is connected to the narrow portion of the other antenna member. The interconnecting elements at the adjacent ends of the antenna members being held in opposing spaced relation to form impedances therebetween for determining the distribution of current flow in the directional antenna.
Inventors
- 👤 Toshitada Doi
- 👤 Kosuke Akiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:08
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q19/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
186 words
A directional antenna comprising a pair of semicircular antenna members arranged to form a loop; each of said antenna members including arcuate upper and lower wire-like conductive elements having a relatively small distance therebetween intermediate the ends of the respective antenna member and a relatively large distance between said conductive elements at each of said ends of said respective antenna member, and interconnecting elements extending between, and connected to said upper and lower conductive elements at said ends of the respective antenna member; output terminal means connected to one of said antenna members at a location where said conductive elements have said relatively small distance therebetween; and impedance means serving as a dummy load connected to the other of said antenna members at a location where said conductive elements of said other antenna members have said relatively small distance therebetween; said interconnecting elements at the ends of said one antenna member being disposed in opposing, adjacently spaced relation to said interconnecting elements at the ends of said other antenna element to form impedance means therebetween for determining the distribution of current flow in the directional antenna.
Claim 2
Dependent Claim
186 words
A directional antenna comprising a pair of semicircular antenna members arranged to form a loop; each of said antenna members including arcuate upper and lower wire-like conductive elements having a relatively small distance therebetween intermediate the ends of the respective antenna member and a relatively large distance between said conductive elements at each of said ends of said respective antenna member, and interconnecting elements extending between, and connected to said upper and lower conductive elements at said ends of the respective antenna member; output terminal means connected to one of said antenna members at a location where said conductive elements have said relatively small distance therebetween; and impedance means serving as a dummy load connected to the other of said antenna members at a location where said conductive elements of said other antenna members have said relatively small distance therebetween; said interconnecting elements at the ends of said one antenna member being disposed in opposing, adjacently spaced relation to said interconnecting elements at the ends of said other antenna element to form impedance means therebetween for determining the distribution of current flow in the directional antenna.
Claim 3
Dependent Claim
32 words
A directional antenna according to claim 1, in which said interconnecting elements are also wire-like and are integral extensions of said upper and lower wire-like conductive elements of the respective antenna member.
Claim 4
Dependent Claim
90 words
A directional antenna according to claim 2, in which each of said antenna members is constituted by a single length of wire having its terminal portions spaced apart in one of said conductive elements at said location where said conductive elements have said relatively small distance therebetween, said output terminal means are connected to said spaced terminal portions of said length of wire constituting said one antenna member, and said impedance means serving as a dummy load is connected to said spaced length of wire constituting said other antenna member.
Claim 5
Dependent Claim
84 words
A directional antenna according to claim 2, in which each of said antenna members includes first and second lengths of wire, said first length of wire constitutes one half of each of said upper and lower conductive elements and said interconnecting element at one of said ends of the respective antenna member, and said second length of wire constitutes the other half of each of said upper and lower conductive elements and said interconnecting element at the other end of said respective antenna member.
Claim 6
Dependent Claim
166 words
A directional antenna according to claim 4, in which said first length of wire has terminal portions spaced from respective terminal portions of said second length of wire at said location of the respective antenna member where said upper and lower conductive eleMents have said relatively small distance therebetween said output terminal means are connected to one terminal portion of said first length of wire and the respective terminal portion of said second length of wire constituting said one antenna member and the other terminal portions of said first and second lengths of wire in said one antenna member are conductively connected to each other, and said impedance means serving as a dummy load is connected to one terminal portion of said first length of wire and the respective terminal portion of said second length of wire constituting said other antenna member and the other terminal portions of said first and second lengths of wire in said other antenna member are conductively connected to each other.
Claim 7
Dependent Claim
56 words
A directional antenna according to claim 2, further comprising clamping means of insulating material securely engaging said wire-like interconnecting element at each of said ends of said one antenna member and at the adjacently spaced end of said other antenna member for maintaining said adjacently spaced ends in a predetermined position with respect to each other.
Claim 8
Dependent Claim
86 words
A directional antenna according to claim 6, in which each of said clamping means includes a pair of confronting plates of said insulating material, each of said plates having a pair of parallel, spaced grooves in the surface thereof facing the other of said plates and being aligned with the pair of grooves in said other plate to define bores for receiving said wire-like interconnecting elements at the respective adjacently spaced ends of said antenna members, and means for securing together said plates in confronting relation.
Claim 9
Dependent Claim
51 words
A directional antenna according to claim 6, further comprising second clamping means of insulating material securely engaging said upper and lower wire-like conductive elements of each of said antenna members at said location when said upper and lower wire-like conductive elements have relatively small distance therebetween for maintaining said small distance.
Claim 10
Dependent Claim
63 words
A directional antenna according to claim 8, in which each of said clamping means includes a pair of confronting pleates of said insulating material, said plates having aligned pairs of parallel grooves in their confronting surfaces cooperating to define bores receiving said upper and lower wire-like conductive elements of the respective antenna member, and means for securing together said plates in confronting relation.
Claim 11
Dependent Claim
88 words
A directional antenna according to claim 9, in which said plates of the second clamping means associated with said one antenna member further have aligned grooves in their confronting surfaces defining an additional bore extending from one of the first mentioned bores to a margin of said plates for receiving leads connecting said one antenna member to said output terminal means, and said impedance means serving as a dummy load is disposed in one of said bores of the second clamping means associated with said other antenna member.
Claim 12
Dependent Claim
36 words
A directional antenna according to claim 8, further comprising mounting means for said loop including an insulating bar extending diametrically across said loop and connected, at the ends of said bar, to said second clamping means.
References Cited (Backward Citations)
US3573832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |