US3737804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection-type frequency-locked amplifier
Assignee: NEC Corp
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Filing: 1972-06-12
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Granted: 1973-06-05
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Expires: 1992-06-12
Abstract
Abstract An injection-type frequency-locked amplifier having separate input and output terminals as opposed to a single input/output terminal. The input impedance of the amplifier is selected such that a portion of the input signal is reflected whereby the reflected input signal cancels the output signal appearing at the input terminal. The output terminal is impedance matched independent of the input terminal.
Inventors
- 👤 K Sakamoto
- 👤 R Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:02
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B2009/126; H03B2200/00; H03B2200/006; H03B2200/0074
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
An injection-type frequency--locked amplifier comprising: an oscillator, frequency locked to an injection input signal, an oscillator output terminal and an oscillator input terminal separate from said output terminal, the input impedance of said input terminal seen looking into said oscillator being at a value such that a portion of said injection input signal is reflected at said input terminal, whereby the reflected input signal cancels the output signal appearing at the input terminal.
Claim 2
Dependent Claim
73 words
An injection-type frequency--locked amplifier comprising: an oscillator, frequency locked to an injection input signal, an oscillator output terminal and an oscillator input terminal separate from said output terminal, the input impedance of said input terminal seen looking into said oscillator being at a value such that a portion of said injection input signal is reflected at said input terminal, whereby the reflected input signal cancels the output signal appearing at the input terminal.
Claim 3
Dependent Claim
16 words
The injection-type frequency-locked amplifier of claim 1 further comprising means for impedance matching said output terminal.
Claim 4
Dependent Claim
36 words
The injection-type frequency-locked amplifier of claim 2 wherein said oscillator comprises a waveguide and an oscillator element disposed in said waveguide, said means for impedance matching the output terminal comprising adjusting screws mounted on the waveguide.
Claim 5
Dependent Claim
48 words
The injection-type frequency-locked amplifier of claim 3 wherein said waveguide is of a longitudinal tubular structure said input and output terminals being formed respectively at the opposite ends of said tubular structure, said input terminal including a coupling window for determining the input impedance of the input terminal.
Claim 6
Dependent Claim
21 words
The injection-type frequency-locked amplifier of claim 4 further including additional adjusting screws for controlling the input impedance of the input terminal.
Claim 7
Dependent Claim
15 words
The injection-type frequency-locked amplifier of Claim 3 wherein said oscillator element is a Gunn diode.
Claim 8
Dependent Claim
59 words
The injection-type frequency-locked amplifier of Claim 3 wherein said waveguide is of T-shape construction, said oscillator element being disposed in the leg of the T-shape, said input and output terminals being disposed respectively at opposite ends of the top portion of said T-shape, said input terminal including a coupling window for determining the input impedance of the input terminal.
Claim 9
Dependent Claim
15 words
The injection-type frequency-locked amplifier of Claim 7 wherein said oscillator element is a Gunn diode.
Claim 10
Dependent Claim
79 words
The injection-type frequency-locked amplifier of Claim 2 further including another oscillator frequency locked to another injection input signal derived from said oscillator another oscillator output terminal and another oscillator input terminal separate from said another output terminal and coupled to the oscillator output terminal, the input impedance of said another input terminal seen looking into said another oscillator being at a value such that a portion of said another injection input signal is reflected at said another input terminal.
Claim 11
Dependent Claim
18 words
The injection-type oscillator of claim 1 wherein said oscillator comprises a transistor oscillator including a coaxial type cavity.
Claim 12
Dependent Claim
15 words
The injection-type frequency-locked amplifier of claim 3 wherein said oscillator element is an IMPATT diode.
Claim 13
Dependent Claim
15 words
The injection-type frequency-locked amplifier of claim 7 wherein said oscillator element is an IMPATT diode.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |