Patent US3792385A successfully refreshed from Google Patents.
US3792385A
Expired / Lapsed
US
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Coaxial magnetic slug tuner
Assignee: RCA Corp
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Filing: 1972-11-06
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Granted: 1974-02-12
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Expires: 1992-11-06
Abstract
Abstract A movable magnetic tuning slug capacitively coupled to both the center conductor and outer conductor of an electromagnetic transmission line is used to provide a desired transmission line impedance in response to an applied magnetic field.
Inventors
- 👤 L Napoli
- 👤 J Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:11
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
Apparatus comprising: a transmission line for transmitting electromagnetic energy having an outer tube-like conductor insulated from a center conductor located inside said outer conductor, said outer and center conductors having parallel longitudinal axes; and at least a first magnetic tuning slug having a predetermined length located inside said outer conductor and said tuning slug length being capacitively coupled to both said outer and center conductors by separating said tuning slug length from said outer and center conductors by dielectric material having said predetermined length, said tuning slug being slidably movable along said center conductor in response to a magnetic field from a magnet, said magnet being in the form of a ring positioned external to and encircling said outer conductor, said magnet being slidably movable longitudinally along said outer conductor.
Claim 2
Dependent Claim
130 words
Apparatus comprising: a transmission line for transmitting electromagnetic energy having an outer tube-like conductor insulated from a center conductor located inside said outer conductor, said outer and center conductors having parallel longitudinal axes; and at least a first magnetic tuning slug having a predetermined length located inside said outer conductor and said tuning slug length being capacitively coupled to both said outer and center conductors by separating said tuning slug length from said outer and center conductors by dielectric material having said predetermined length, said tuning slug being slidably movable along said center conductor in response to a magnetic field from a magnet, said magnet being in the form of a ring positioned external to and encircling said outer conductor, said magnet being slidably movable longitudinally along said outer conductor.
Claim 3
Dependent Claim
36 words
Apparatus according to claim 1, wherein said tuning slug comprises a first dielectric ring surrounding a concentric magnetic ring which in turn surrounds a second dielectric ring concentric with said magnetic ring and said center conductor.
Claim 4
Dependent Claim
14 words
Apparatus according to claim 1, wherein said transmission line is a coaxial transmission line.
Claim 5
Dependent Claim
213 words
A coaxial transmission line double slug tuner comprising: a transmission having coaxial outer and center conductors, said center conductor located inside said outer conductor; a first magnetic tuning slug located inside said outer conductor and having a first dielectric ring surrounding a concentric magnetic ring over a first predetermined length which in turn surrounds a second dielectric ring having said first predetermined length, said second dielectric ring being concentric with said magnetic ring and said center conductor, said magnetic ring being capacitively coupled to both said outer and center conductors; and a second magnetic tuning slug located inside said outer conductor and having a first dielectric ring surrounding a concentric magnetic ring over a second predetermined length which in turn surrounds a second dielectric ring having said second predetermined length, said second dielectric ring being concentric with said second tuning slug magnetic ring and said center conductor, said second tuning slug magnetic ring being capacitively coupled to both said outer and center conductors, said second and first magnetic tuning slugs being slidably movable along said center conductor in response to a magnetic field from a magnet, said magnet being in the form of a ring positioned external to and encircling said outer conductor, said magnet being slidably movable longitudinally along said outer conductor.
Claim 6
Dependent Claim
213 words
A coaxial transmission line double slug tuner comprising: a transmission having coaxial outer and center conductors, said center conductor located inside said outer conductor; a first magnetic tuning slug located inside said outer conductor and having a first dielectric ring surrounding a concentric magnetic ring over a first predetermined length which in turn surrounds a second dielectric ring having said first predetermined length, said second dielectric ring being concentric with said magnetic ring and said center conductor, said magnetic ring being capacitively coupled to both said outer and center conductors; and a second magnetic tuning slug located inside said outer conductor and having a first dielectric ring surrounding a concentric magnetic ring over a second predetermined length which in turn surrounds a second dielectric ring having said second predetermined length, said second dielectric ring being concentric with said second tuning slug magnetic ring and said center conductor, said second tuning slug magnetic ring being capacitively coupled to both said outer and center conductors, said second and first magnetic tuning slugs being slidably movable along said center conductor in response to a magnetic field from a magnet, said magnet being in the form of a ring positioned external to and encircling said outer conductor, said magnet being slidably movable longitudinally along said outer conductor.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |