US3568205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel helical antenna
Assignee: Goodyear Aerospace Corp
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Filing: 1968-02-12
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Granted: 1971-03-02
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Expires: 1988-02-12
Abstract
Abstract A directional electromagnetic radiating antenna with circular polarization capable of operating over wide frequency bands and having a greater electrical length than actual physical length. The invention applies basically to a helical antenna utilizing one or more unifilar or multifilar windings which possess the characterizing feature of having an increased electrical path length whereby the operating characteristics of the antenna will resemble that of a larger physical structure than is actually necessary to support the hardware comprising the antenna.
Inventors
- 👤 Albert C Buxton
- 👤 Jerrold S Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:30
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A directional electromagnetic radiating device with circular polarization capable of operating over a side frequency band which includes: a supporting structure; at least one radiating element wound in helical fashion around the supporting structure with each convolution substantially uniformly spaced from the adjacent convolution; circuit means connected periodically to the radiating elements to increase the electrical path length thereof; and means to drive at least one radiating element.
Claim 2
Dependent Claim
68 words
A directional electromagnetic radiating device with circular polarization capable of operating over a side frequency band which includes: a supporting structure; at least one radiating element wound in helical fashion around the supporting structure with each convolution substantially uniformly spaced from the adjacent convolution; circuit means connected periodically to the radiating elements to increase the electrical path length thereof; and means to drive at least one radiating element.
Claim 3
Dependent Claim
44 words
The device according to claim 1 wherein an even number of radiating elements are provided with alternate ones of the elements forming first and second sets of radiating elements, respectively, and the circuit means periodically couple the first and second sets of radiating elements.
Claim 4
Dependent Claim
15 words
The device according to claim 2 wherein the circuit means comprise periodic capacitor loading circuits.
Claim 5
Dependent Claim
18 words
The device according to claim 2 wherein the circuit means comprise amplifiers with controlled gain and phase shift.
Claim 6
Dependent Claim
20 words
The device according to claim 1 wherein the circuit means comprises inductive loadings uniformly periodic with respect to each convolution.
Claim 7
Dependent Claim
80 words
A directional electromagnetic radiating device with circular polarization capable of operating over a wide frequency band which includes: a supporting structure; a first conductor wound in helical fashion aroUnd the supporting structure with each convolution uniformly spaced from the adjacent convolutions; a second conductor with a lengthened electrical path wound in helical fashion around the support structure with each convolution uniformly spaced from the adjacent convolutions of the first conductor; and means to drive at least one of the conductors.
Claim 8
Dependent Claim
80 words
A directional electromagnetic radiating device with circular polarization capable of operating over a wide frequency band which includes: a supporting structure; a first conductor wound in helical fashion aroUnd the supporting structure with each convolution uniformly spaced from the adjacent convolutions; a second conductor with a lengthened electrical path wound in helical fashion around the support structure with each convolution uniformly spaced from the adjacent convolutions of the first conductor; and means to drive at least one of the conductors.
Claim 9
Dependent Claim
37 words
The device according to claim 6 wherein each conductor is multifilar, each conductor has the same number of elements, and the elements of the first and second conductors alternate along the supporting structure in uniformly spaced relation.
Claim 10
Dependent Claim
62 words
The device according to claim 6 wherein the first conductor also has an increased electrical path length, each conductor has two elements, the elements of the first and second conductors alternate along the supporting structure in uniformly spaced relation, the first conductor is active and the other conductor is parasitic, and electrical connection straps connect the parasitic elements in a closed loop.
References Cited (Backward Citations)
US1718255A
Cited
US1898661A
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GB576159A
Cited
US3019438A
Cited
DE1129191B
Cited
US3184747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |