Patent US3971031A successfully refreshed from Google Patents.
US3971031A
Expired / Lapsed
US
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Loaded quad antenna
Assignee: Individual
•
Filing: 1975-10-31
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Granted: 1976-07-20
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Expires: 1995-10-31
Abstract
Abstract A driven quad antenna unit includes four perpendicularly arranged antenna elements, each element containing therein a high Q load coil in order to reduce the overall size of the antenna structure. A similarly configured parasitic loop unit functioning as a director or reflector (or both may be employed) is located in front or behind, as the case may be, the driven antenna unit. As with the driven unit, each side of the parasitic unit has a coil connected therein, the number of turns in each coil of the director being somewhat less than in the number in the coils of the driven unit and somewhat greater in the coils of the reflector.
Inventors
- 👤 Emmett F. Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:50
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q19/00; H01Q19/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
40 words
An antenna structure comprising first, second, third and fourth antenna elements, each element having a loading coil serially connected therein, and means for supporting said elements in a substantially common plane with each element oriented generally perpendicular to the other.
Claim 2
Dependent Claim
40 words
An antenna structure comprising first, second, third and fourth antenna elements, each element having a loading coil serially connected therein, and means for supporting said elements in a substantially common plane with each element oriented generally perpendicular to the other.
Claim 3
Dependent Claim
36 words
An antenna structure in accordance with claim 1 in which each of said elements includes first and second straight conductive sections with the coil of each element being connected intermediate the first and second sections thereof.
Claim 4
Dependent Claim
38 words
An antenna structure in accordance with claim 2 in which for a frequency of 14 MHz said straight sections each have a length of approximately 4.4 feet and said coils each have an inductance of approximately 9.54 microhenries.
Claim 5
Dependent Claim
21 words
An antenna structure in accordance with claim 3 including an adjustable tap associated with each coil for varying the inductance thereof.
Claim 6
Dependent Claim
38 words
An antenna structure in accordance with claim 2 in which for a frequency of 21 MHz said straight sections each have a length of approximately 2.9 feet and said coils each have an inductance of approximately 6.4 microhenries.
Claim 7
Dependent Claim
21 words
An antenna structure in accordance with claim 5 including an adjustable tap associated with each coil for varying the inductance thereof.
Claim 8
Dependent Claim
21 words
An antenna structure in accordance with claim 1 in which increasing the number of turns in each coil increases with wavelength.
Claim 9
Dependent Claim
119 words
An antenna structure in accordance with claim 1 in which the first straight section of said second element is integral with and constitutes a right angle continuation of the second section of said first element, in which the first straight section of said third element is integral with and constitutes a right angle continuation of the second section of said second element, in which the first straight section of said fourth element is integral with and constitutes a right angle continuation of the second section of said third element, the ends of the first and second sections of the first and fourth elements remote from the coils contained in said first and fourth element providing transmission line feed points.
Claim 10
Dependent Claim
51 words
An antenna structure in accordance with claim 1 in which one end of each coil contained in each element is fixedly attached to one end of one straight section and an adjustable tap for each coil connecting a selected portion of its coil to the other straight section for that element.
Claim 11
Dependent Claim
19 words
An antenna structure in accordance with claim 9 in which said coils each contain between 20-30 turns or convolutions.
Claim 12
Dependent Claim
24 words
An antenna structure in accordance with claim 10 in which the physical length of each of said straight sections is less than 0.075 wavelength.
Claim 13
Dependent Claim
21 words
An antenna structure in accordance with claim 10 in which the physical length of each straight section is approximately 0.0665 wavelength.
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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |