US4101854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable helical resonator
Assignee: United States Department of the Army
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Filing: 1977-01-28
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Granted: 1978-07-18
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Expires: 1997-01-28
Abstract
Abstract An RF tuneable resonator wherein RF energy is applied to a helical coil andhe resonant frequency of the resonator is varied by utilizing a pair of axially moveable dielectric cylinders. One dielectric cylinder surrounds the helical coil and the other dielectric cylinder is positioned within the coil. Both dielectric cylinders are individually actuated along the axis of the coil.
Inventors
- 👤 Emanuel Gikow, deceased
- 👤 Richard S. Tilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:09
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
54 words
A RF tuneable resonator comprising: a metallic cylindrical shield; a helical coil axially positioned within said metallic shield and including a RF coupling means at one end thereof; a first axially moveable dielectric means intermediate said metallic shield and said helical coil; and a second axially moveable dielectric means positioned within said helical coil.
Claim 2
Dependent Claim
54 words
A RF tuneable resonator comprising: a metallic cylindrical shield; a helical coil axially positioned within said metallic shield and including a RF coupling means at one end thereof; a first axially moveable dielectric means intermediate said metallic shield and said helical coil; and a second axially moveable dielectric means positioned within said helical coil.
Claim 3
Dependent Claim
21 words
The tuneable resonator in accordance with claim 1 wherein said first dielectric means comprises a dielectric cylinder encompassing said helical coil.
Claim 4
Dependent Claim
18 words
The tuneable resonator in accordance with claim 1 wherein said second dielectric means comprises a solid dielectric cylinder.
Claim 5
Dependent Claim
18 words
The tuneable resonator in accordance with claim 2 wherein said second dielectric means comprises a solid dielectric cylinder.
Claim 6
Dependent Claim
40 words
The tuneable resonator in accordance with claim 4 wherein said encompassing dielectric cylinder extends radially from said coil to said shield and wherein the diameter of said solid dielectric cylinder is substantially equal to the inner diameter of said coil.
Claim 7
Dependent Claim
39 words
The tuneable resonator in accordance with claim 5 wherein the inner surface of said encompassing dielectric cylinder includes a helically grooved channel having a pitch corresponding to the pitch of said helical coil and engaging the outer surface thereof.
Claim 8
Dependent Claim
35 words
The tuneable resonator in accordance with claim 5 wherein said solid dielectric cylinder includes a helically grooved channel having a pitch corresponding to the pitch of said helical coil and engaging the inner surface thereof.
Claim 9
Dependent Claim
69 words
The tuneable resonator in accordance with claim 5 wherein the inner surface of said encompassing dielectric cylinder includes a helically grooved channel having a pitch corresponding to the pitch of said helical coil and engaging the outer surface of said coil and wherein said solid dielectric cylinder includes a helically grooved channel having a pitch corresponding to the pitch of said helical coil and engaging the inner surface thereof.
Claim 10
Dependent Claim
19 words
The tuneable resonator in accordance with claim 5 wherein the outer surface of said encompassing dielectric cylinder is metallized.
Claim 11
Dependent Claim
19 words
The tuneable resonator in accordance with claim 8 wherein the outer surface of said encompassing dielectric cylinder is metallized.
Claim 12
Dependent Claim
42 words
The tuneable resonator in accordance with claim 5 wherein both of said dielectric cylinders are substantially less than two-thirds the length of said helical coil, are moveable along the entire length of said coil and are characterized by relatively high dielectric constants.
Claim 13
Dependent Claim
43 words
The tuneable resonator in accordance with claim 4 wherein both of said dielectric cylinders are substantially less than two-thirds of the length of said helical coil, are moveable along the entire length of said coil and are characterized by relatively high dielectric constants.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |