US3906408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency translator using gyromagnetic material
Assignee: RCA Corp
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Filing: 1974-10-23
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Granted: 1975-09-16
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Expires: 1994-10-23
Abstract
Abstract A frequency translator is described that includes a toroid of gyromagnetic material extending along a length of waveguide. The toroid has demagnetizing gaps along its length. RF signals propagating along the waveguide are frequency deviated by the application of sawtooth current coupled through and along the toroid as modulating signals therefor.
Inventors
- 👤 Wieslaw Wojciech Siekanowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:45
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/19; H01P1/195
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A translator for providing a frequency deviation of radio frequency signals in accordance with a modulating signal comprising: a waveguide having a toroid of gyromagnetic material extending along a length of the waveguide, said toroid having at least one demagnetizing gap along the length of said toroid, said waveguide being dimensioned to support given radio frequency signals propagated along said waveguide, means for applying a sawtooth current through said toroid to translate according to said current the frequency of said given signals.
Claim 2
Dependent Claim
82 words
A translator for providing a frequency deviation of radio frequency signals in accordance with a modulating signal comprising: a waveguide having a toroid of gyromagnetic material extending along a length of the waveguide, said toroid having at least one demagnetizing gap along the length of said toroid, said waveguide being dimensioned to support given radio frequency signals propagated along said waveguide, means for applying a sawtooth current through said toroid to translate according to said current the frequency of said given signals.
Claim 3
Dependent Claim
24 words
The combination claimed in claim 1 wherein said means for applying a sawtooth current includes a conductor extending through the center of said toroid.
Claim 4
Dependent Claim
24 words
The combination claimed in claim 1 wherein said waveguide is rectangular with the toroid centered between the broad and narrow walls of the waveguide.
Claim 5
Dependent Claim
17 words
The combination claimed in claim 1 wherein said toroid is filled with a body of dielectric material.
Claim 6
Dependent Claim
21 words
The combination claimed in claim 1 wherein the total size of the demagnetizing gap 1g in the toroid is determined by
Claim 7
Dependent Claim
149 words
A translator for providing a frequency deviation of radio frequency signals in accordance with a modulating signal comprising: a waveguide having a toroid of gyromagnetic material extending along a length of the waveguide, said toroid having at least one demagnetizing gap along the length of said toroid, said waveguide being dimensioned to support given radio frequency signals coupled into and out of said waveguide, a conductor extending through the center of said toroid, and a source of sawtooth current coupled to said conductor, said sawtooth current characterized by the current amplitude each cycle going linearly from a reference potential to a first maximum amplitude in a first direction through said toroid and to a resetting potential in a second opposite direction through said toroid, whereby operation takes place in two quadrants of the B-H loop for said toroid in a manner to alter the frequency of said given signals.
Claim 8
Dependent Claim
149 words
A translator for providing a frequency deviation of radio frequency signals in accordance with a modulating signal comprising: a waveguide having a toroid of gyromagnetic material extending along a length of the waveguide, said toroid having at least one demagnetizing gap along the length of said toroid, said waveguide being dimensioned to support given radio frequency signals coupled into and out of said waveguide, a conductor extending through the center of said toroid, and a source of sawtooth current coupled to said conductor, said sawtooth current characterized by the current amplitude each cycle going linearly from a reference potential to a first maximum amplitude in a first direction through said toroid and to a resetting potential in a second opposite direction through said toroid, whereby operation takes place in two quadrants of the B-H loop for said toroid in a manner to alter the frequency of said given signals.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |