Patent US3623116A successfully refreshed from Google Patents.
US3623116A
Expired / Lapsed
US
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Ferrite core crossed spaced loop antenna
Assignee: United States Department of the Navy
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Filing: 1970-08-19
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Granted: 1971-11-23
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Expires: 1990-08-19
Abstract
Abstract Disclosed herewith is an antenna having an upper tier field sensor of four ferrite core loop antennas connected in crossed simple-loop mode disposed at 90* intervals around a center support pipe and a lower tier direction finder of eight ferrite core loop antennas connected in crossed spaced loop mode likewise disposed around said center support pipe but at 45* intervals. The electrical leads of each of said ferrite core loop antennas of both of the aforesaid tiers are respectively connected to each other and a compatible data processing receiver in such manner and as necessary as to effect a bearing readout therefrom of predetermined electromagnetic energy sensed by the entire antenna.
Inventors
- 👤 Terry C Green
- 👤 Ruell F Solberg Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:33
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/04; G01S3/06; H; H01; H01Q; H01Q7/00; H01Q7/06; H01Q7/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
216 words
An antenna, comprising in combination: a pipe means, having a longitudinal axis, adapted for being mounted at a predetermined attitude on a predetermined support structure; a first plurality of hollow arm means connected to said pipe means in such manner as to radially extend therefrom at uniform angular intervals therearound in a first plane that is normal to the longitudinal axis thereof; a first plurality of ferrite core loop energy sensors respectively connected to said first plurality of hollow arm means at a predetermined distance from said pipe means; a second plurality of hollow arm means connected to said pipe means in such manner as to radially extend therefrom at uniform angular intervals therearound in a second plane that is normal to the longitudinal axis thereof and disposed at a predetermined distance from the aforesaid first plane; a second plurality of ferrite core loop energy sensors respectively connected to said second plurality of hollow arm means at a predetermined distance from said pipe means; electrical leads respectively connected to each of said ferrite core loop energy sensors adapted for being connected in predetermined manners to each other as required to obtain spaced loop and simple loop modes and to a predetermined utilization apparatus to, in turn, cause predetermined operational characteristics to be effected by said antenna.
Claim 2
Dependent Claim
216 words
An antenna, comprising in combination: a pipe means, having a longitudinal axis, adapted for being mounted at a predetermined attitude on a predetermined support structure; a first plurality of hollow arm means connected to said pipe means in such manner as to radially extend therefrom at uniform angular intervals therearound in a first plane that is normal to the longitudinal axis thereof; a first plurality of ferrite core loop energy sensors respectively connected to said first plurality of hollow arm means at a predetermined distance from said pipe means; a second plurality of hollow arm means connected to said pipe means in such manner as to radially extend therefrom at uniform angular intervals therearound in a second plane that is normal to the longitudinal axis thereof and disposed at a predetermined distance from the aforesaid first plane; a second plurality of ferrite core loop energy sensors respectively connected to said second plurality of hollow arm means at a predetermined distance from said pipe means; electrical leads respectively connected to each of said ferrite core loop energy sensors adapted for being connected in predetermined manners to each other as required to obtain spaced loop and simple loop modes and to a predetermined utilization apparatus to, in turn, cause predetermined operational characteristics to be effected by said antenna.
Claim 3
Dependent Claim
31 words
The invention of claim 1 further characterized by means for encapsulating at least portions of said antenna, so as to effect protection thereof from an ambient environment that is hostile thereto.
Claim 4
Dependent Claim
46 words
The device of claim 1 wherein said pipe means and said first and second pluralities of hollow arm means are respectively constructed of a material that acts as electromagnetic shielding between the outside ambient environmental medium in which they are disposed and the inside passageways thereof.
Claim 5
Dependent Claim
22 words
The device of claim 1 wherein said utilization apparatus comprises: a receiver; and a readout connected to the output of said receiver.
Claim 6
Dependent Claim
194 words
The device of claim 1 wherein each of said first and second pluralities of ferrite core loop energy sensors comprises: a ferrite bar having a longitudinal axis; a coil of wire having a predetermined number of turns wound around said ferrite bar along a predetermined center section thereof; a first U-shaped saddle disposed around one end of said ferrite bar for the support thereof; a first cover releasably attached to said first U-shaped saddle for the securing of said ferrite bar therein; a second U-shaped saddle disposed around the other end of said ferrite bar for the support thereof; a second cover releasably attached to said second U-shaped saddle for the securing of said ferrite bar therein; an electrostatic shield, having a plurality of electromagnetic energy insulating walls, effectively disposed around said coil of wire and the predetermined center section of the ferrite bar around which it is wound; a slot located in and extending through one of the walls of said electrostatic shield in parallel with the longitudinal axis of said ferrite bar; and means connected to said first and second U-shaped saddles for the attachment thereof to the aforesaid hollow arm means.
Claim 7
Dependent Claim
18 words
The device of claim 5 wherein said first and second U-shaped saddles are constructed of shock resistant fiberglass.
Claim 8
Dependent Claim
19 words
The device of claim 5 wherein said first and second covers are compression covers constructed of shock resistant fiberglass.
Claim 9
Dependent Claim
17 words
The device of claim 5 wherein said coil of wire is configured to have predetermined inductance characteristics.
Claim 10
Dependent Claim
12 words
The device of claim 5 wherein said coil of wire is multiturn.
Claim 11
Dependent Claim
159 words
The device of claim 5 wherein said electrostatic shield comprises: a plurality of walls surrounding said ferrite bar, each of which has a pair of fiberglass plates disposed in such manner as to have the aforesaid coil of wire sandwiched therebetween; at least one metallic plate bonded to those sides of each of said fiberglass plates that are not adjacent to the wire of said coil of wire; means connected to each of said metal sheets for the electrical connection thereof and for holding of the aforesaid walls in a predetermined geometrical configuration; means connected to one wall of said plurality of walls for the securing thereof to one of the arm means of the aforesaid plurality of hollow arm means; a pair of apertures located in said one wall of said plurality of walls; and a pair of electrical conductors respectively extending through said pair of apertures and connected to the terminals of the aforesaid coil of wire.
References Cited (Backward Citations)
US3329954A
Cited
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 |