Patent US3577196A successfully refreshed from Google Patents.
US3577196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rollable slot antenna
Assignee: Individual
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Filing: 1968-11-25
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Granted: 1971-05-04
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Expires: 1988-11-25
Abstract
Abstract An antenna having a rectangular sheet of metal foil with parallel spaced slots formed therein. The slotted sheet serves as a radiator operating in the UHF band. The metal sheet is enclosed between overlying and underlying plastic sheets which are heat sealed to the metal sheet. The composite laminate structure is flexible thus permitting the rolling thereof.
Inventors
- 👤 Eugene F Pereda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:01
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/085; H01Q1/087; H01Q13/00; H01Q13/10; H01Q13/106; H01Q19/00; H01Q19/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
A slot Yagi-type antenna structure comprising a sheet of metal foil serving as an antenna plane, at least one dielectric sheet juxtaposed on said foil sheet to form a flexible laminate, said foil sheet having a plurality of slots formed therein a signal conducting lead positioned in contacting engagement with said foil sheet at preselected points thereon for completing electrical connections between said foil sheet and said lead, the plurality of slots including a director element slot formed in the sheet, a driven element slot of greater length than the director element slot formed in the sheet and in adjacent spaced relationship to the director element slot, a reflector element slot formed in the sheet having greater length than the driven and director element slots, the reflector element slot being in adjacent spaced relationship to the driven element slot.
Claim 2
Dependent Claim
139 words
A slot Yagi-type antenna structure comprising a sheet of metal foil serving as an antenna plane, at least one dielectric sheet juxtaposed on said foil sheet to form a flexible laminate, said foil sheet having a plurality of slots formed therein a signal conducting lead positioned in contacting engagement with said foil sheet at preselected points thereon for completing electrical connections between said foil sheet and said lead, the plurality of slots including a director element slot formed in the sheet, a driven element slot of greater length than the director element slot formed in the sheet and in adjacent spaced relationship to the director element slot, a reflector element slot formed in the sheet having greater length than the driven and director element slots, the reflector element slot being in adjacent spaced relationship to the driven element slot.
Claim 3
Dependent Claim
145 words
An antenna structure comprising a sheet of metal foil serving as an antenna plane, two parallel spaced dielectric sheets sandwiching said foil sheet to form a flexible laminate, said foil sheet having a plurality of slots formed therein, and a signal conducting lead positioned in contacting engagement with said foil sheet at preselected points thereon for completing electrical connections between said foil sheet and said lead, three rectangular slots longitudinally and equally spaced in order of increasing slot length, each slot being transversely disposed with respect to a geometric center of the foil, a first end slot serving as a director element, a second intermediate slot serving as a driver element, and a third end slot serving as a reflector element, said lead including two conductors, the conductors being electrically connected to oppositely disposed and transversely extending lateral edge portions of the second intermediate slot.
Claim 4
Dependent Claim
145 words
An antenna structure comprising a sheet of metal foil serving as an antenna plane, two parallel spaced dielectric sheets sandwiching said foil sheet to form a flexible laminate, said foil sheet having a plurality of slots formed therein, and a signal conducting lead positioned in contacting engagement with said foil sheet at preselected points thereon for completing electrical connections between said foil sheet and said lead, three rectangular slots longitudinally and equally spaced in order of increasing slot length, each slot being transversely disposed with respect to a geometric center of the foil, a first end slot serving as a director element, a second intermediate slot serving as a driver element, and a third end slot serving as a reflector element, said lead including two conductors, the conductors being electrically connected to oppositely disposed and transversely extending lateral edge portions of the second intermediate slot.
Claim 5
Dependent Claim
125 words
An antenna structure comprising a sheet of metal foil serving as an antenna plane, two parallel spaced dielectric sheets sandwiching said foil sheet to form a flexible laminate, said foil sheet having a plurality of slots formed therein, and a signal conducting lead positioned in contacting engagement with said foil sheet at preselected points thereon for completing electrical connections between said foil sheet and said lead, two longitudinally extending and parallel spaced slot sets forming a broadside array, each of said sets including three rectangular slots longitudinally spaced in order of increasing slot length, each set comprising a first end slot serving as a director element, a second intermediate slot serving as a driven element, and a third end slot serving as a reflector element.
Claim 6
Dependent Claim
125 words
An antenna structure comprising a sheet of metal foil serving as an antenna plane, two parallel spaced dielectric sheets sandwiching said foil sheet to form a flexible laminate, said foil sheet having a plurality of slots formed therein, and a signal conducting lead positioned in contacting engagement with said foil sheet at preselected points thereon for completing electrical connections between said foil sheet and said lead, two longitudinally extending and parallel spaced slot sets forming a broadside array, each of said sets including three rectangular slots longitudinally spaced in order of increasing slot length, each set comprising a first end slot serving as a director element, a second intermediate slot serving as a driven element, and a third end slot serving as a reflector element.
Claim 7
Dependent Claim
61 words
The antenna set forth in claim 3 wherein said lead includes two conductors, the ends of said conductors being electrically connected to oppositely disposed edge portions of the intermediate slot associated with the first slot set, intermediate conductor points of said lead conductors being electrically connected to oppositely disposed edge portions of the intermediate slot associated with the second slot set.
Claim 8
Dependent Claim
23 words
The antenna set forth in claim 4 wherein the connection of said lead conductors to said slots effectuates transposed feed between the slots.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |