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Patent US3745579A successfully refreshed from Google Patents.
US3745579A
Expired / Lapsed
US
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Double mixing doppler simulator
Assignee: United States Department of the Navy
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Filing: 1969-02-26
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Granted: 1973-07-10
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Expires: 1989-02-26
Abstract
Abstract A double mixing doppler simulator comprising a first balanced mixer, a first continuous wave source connected to the first balanced mixer, a first bandpass filter, also connected to the first balanced mixer, and a second balanced mixer connected to the first band-pass filter. The doppler simulator further comprises a second continuous wave source and a second band-pass filter connected to the second balanced mixer.
Inventors
- 👤 L Lott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:14
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A double mixing doppler simulator comprising: a. a first balanced mixer, b. a first band-pass filter connected to said first balanced mixer, c. a second balanced mixer connected in circuit with said first band-pass filter; d. a second band-pass filter connected to said second balanced mixer, and e. means for introducing a doppler frequency shift into the system coupled to said first and said second balanced mixers.
Claim 2
Dependent Claim
67 words
A double mixing doppler simulator comprising: a. a first balanced mixer, b. a first band-pass filter connected to said first balanced mixer, c. a second balanced mixer connected in circuit with said first band-pass filter; d. a second band-pass filter connected to said second balanced mixer, and e. means for introducing a doppler frequency shift into the system coupled to said first and said second balanced mixers.
Claim 3
Dependent Claim
38 words
A double mixing doppler simulator as claimed in claim 1 wherein said means for introducing a doppler frequency shift into the system comprises: a. a first continuous wave source connected in circuit with said first balanced mixer comprising:
Claim 4
Dependent Claim
9 words
a frequency multiplier coupled to said crystal oscillator, and
Claim 5
Dependent Claim
9 words
a frequency multiplier coupled to said crystal oscillator, and
Claim 6
Dependent Claim
9 words
a frequency multiplier coupled to said crystal oscillator, and
Claim 7
Dependent Claim
9 words
a frequency multiplier coupled to said crystal oscillator, and
Claim 8
Dependent Claim
9 words
a crystal frequency trimmer connected to said crystal oscillator.
Claim 9
Dependent Claim
9 words
a crystal frequency trimmer connected to said crystal oscillator.
Claim 10
Dependent Claim
48 words
A double mixing doppler simulator as claimed in claim 1 wherein said means for introducing a doppler frequency shift into the system comprises: a. an offset frequency synthesizer coupled between said first and said second balanced mixers, and b. a burst generator connected to said offset frequency synthesizer.
Claim 11
Dependent Claim
24 words
a crystal frequency trimmer connected to said crystal oscillator, b. a second continuous wave source connected in circuit with said second balanced mixer comprising:
Claim 12
Dependent Claim
24 words
a crystal frequency trimmer connected to said crystal oscillator, b. a second continuous wave source connected in circuit with said second balanced mixer comprising:
Claim 13
Dependent Claim
116 words
A double mixing doppler simulator as claimed in claim 3 wherein said offset frequency synthesizer comprises: a. a fiRst crystal oscillator, b. a second crystal oscillator, c. an audio oscillator coupled to said second crystal oscillator via a first mixer, the output of said first mixer fed to a second mixer, d. a first frequency multipler, saId first crystal oscillator connected to said first frequency multiplier and to said second mixer, e. a second frequency multiplier, the output of said second mixer fed to said second frequency multiplier, and f. a diode mixer coupled between the outputs of said first and said second frequency multiplier which are connected to said first and second balanced mixers, respectively.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |