US3766494A
Expired / Lapsed
US
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Resonance-frequency variable resonator
Assignee: Panasonic Holdings Corp
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Filing: 1971-05-19
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Granted: 1973-10-16
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Expires: 1991-05-19
Abstract
Abstract A resonance frequency variable resonator is provided, which comprises a ferrite strip line having a ferrite chip, and a varactor diode electrically connected to the ferrite strip line. Each of the reactances of the ferrite strip line and the varactor diode is controlled by a magnetic field and a bias voltage applied thereto so as to establish the resonance frequency of the resonator as desired. Since the ferrite strip line and the varactor diode complement each other, the resonator has many excellent properties, high speed responsiveness, wide variation range, reliability, and so on.
Inventors
- 👤 T Anbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:15
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/08; H01P7/088; H03; H03H; H03H5/00; H03H5/003; H03J; H03J3/00; H03J3/02; H03J3/16; H03J3/18; H03J3/185
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
81 words
A resonance-frequency variable resonator comprising: a ferrite strip line element including an inner conductive plate, at least one outer conductive plate facing said inner conductive plate, and at least one ferrite plate positioned between said inner and outer conductive plates said ferrite line element being subjected to a magnetic field; a varactor diode having anode and cathode terminals which are connected to said inner and outer conductive plate; and biasing source means for applying a reverse bias to said Varactor diode.
Claim 2
Dependent Claim
81 words
A resonance-frequency variable resonator comprising: a ferrite strip line element including an inner conductive plate, at least one outer conductive plate facing said inner conductive plate, and at least one ferrite plate positioned between said inner and outer conductive plates said ferrite line element being subjected to a magnetic field; a varactor diode having anode and cathode terminals which are connected to said inner and outer conductive plate; and biasing source means for applying a reverse bias to said Varactor diode.
Claim 3
Dependent Claim
46 words
A resonator according to claim 1, wherein said anode and cathode terminals are respectively connected to ends of said inner and outer conductive plates through at least one capacitor, and said inner and outer conductive plates are connected to each other at the opposite ends thereof.
Claim 4
Dependent Claim
22 words
A resonator according to claim 1, wherein said magnetic field is varied within a region of magnetic resonance of said ferrite plate.
Claim 5
Dependent Claim
25 words
A resonator according to claim 1, comprising a pair of outer conductive plates which are connected to each other for having a common electric potential.
Claim 6
Dependent Claim
16 words
A resonator according to claim 1, further comprising a supplemental capacitor parallel with said varactor diode.
Claim 7
Dependent Claim
113 words
A resonance-frequency variable resonator, in combination with an oscillator including an active element, which resonator comprises a ferrite strip line element including an inner conductive plate which is grounded at one end and adapted to be connected at the opposite end to said active element, at least one outer conductive plate which is grounded at both ends, and at least one ferrite plate positioned between said inner and outer conductive plates and subjected to a variable magnetic field; a varactor diode having an anode which is connected through a capacitor to said opposite end of said inner conductive plate and to a negative variable voltage source, and a cathode terminal which is grounded.
Claim 8
Dependent Claim
113 words
A resonance-frequency variable resonator, in combination with an oscillator including an active element, which resonator comprises a ferrite strip line element including an inner conductive plate which is grounded at one end and adapted to be connected at the opposite end to said active element, at least one outer conductive plate which is grounded at both ends, and at least one ferrite plate positioned between said inner and outer conductive plates and subjected to a variable magnetic field; a varactor diode having an anode which is connected through a capacitor to said opposite end of said inner conductive plate and to a negative variable voltage source, and a cathode terminal which is grounded.
Claim 9
Dependent Claim
16 words
A resonator according to claim 6, wherein said varactor diode is shunted by a supplemental capacitor.
Claim 10
Dependent Claim
129 words
A resonance-frequency variable resonator in combination with a tuned amplifier including at least one active element, which resonator comprises a ferrite strip line element including an inner conductive plate which is grounded at one end and adapted to be connected at the opposite end to said active element through a coupling capacitor, the intermediate portion of said inner conductive plate being connected to an input line, at least one outer conductive plate grounded at both ends, and at least one ferrite plate positioned between said outer and inner conductive plates and subjected to a variable magnetic field; and a varactor diode having a cathode which is connected to said opposite end of said inner conductive plate and an anode which is connected to a negative variable d.c. voltage source.
Claim 11
Dependent Claim
129 words
A resonance-frequency variable resonator in combination with a tuned amplifier including at least one active element, which resonator comprises a ferrite strip line element including an inner conductive plate which is grounded at one end and adapted to be connected at the opposite end to said active element through a coupling capacitor, the intermediate portion of said inner conductive plate being connected to an input line, at least one outer conductive plate grounded at both ends, and at least one ferrite plate positioned between said outer and inner conductive plates and subjected to a variable magnetic field; and a varactor diode having a cathode which is connected to said opposite end of said inner conductive plate and an anode which is connected to a negative variable d.c. voltage source.
References Cited (Backward Citations)
US3102987A
Cited
GB1100751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |