US3772584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homodyne multiplier
Assignee: United States Department of the Army
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Filing: 1972-09-14
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Granted: 1973-11-13
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Expires: 1992-09-14
Abstract
Abstract In the homodyne multiplier, a frequency mixer has both the radio frequency and local oscillator input ports driven by the same signal source, generating multiples of the input frequency as output signals. The signals coupled to the respective input ports of the mixer are controllable in phase and amplitude with respect to each other. The output of the mixer then generates a large number of signals which have a high degree of phase coherence with the original driving signal. Since the mixer functions as a non-linear combination element, phase perturbations are not internally generated which adversely affect coherence. Attenuators in the transmission lines to the mixer inputs allow adjustment of signal levels.
Inventors
- 👤 T Barley
- 👤 G Rast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:13
CPC Classifications
H; H03; H03B; H03B21/00; H03B21/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A homodyne frequency multiplier for producing a broad band frequency spectrum and comprising: a frequency mixer having first and second inputs and an output, a hybrid having an input and first and second outputs, a first variable attenuator connected between the first input of said mixer and the first output of said hybrid, and the second output of said hybrid being coupled to the second input of said mixer.
Claim 2
Dependent Claim
69 words
A homodyne frequency multiplier for producing a broad band frequency spectrum and comprising: a frequency mixer having first and second inputs and an output, a hybrid having an input and first and second outputs, a first variable attenuator connected between the first input of said mixer and the first output of said hybrid, and the second output of said hybrid being coupled to the second input of said mixer.
Claim 3
Dependent Claim
51 words
A homodyne frequency multiplier as set forth in claim 1 wherein said mixer is a double-balanced mixer for multiplying up by even valued multiples while suppressing odd valued multiples of the output signal; and further comprising a second variable attenuator connected between said second hybrid output and said second mixer input.
Claim 4
Dependent Claim
31 words
A homodyne multiplier as set forth in claim 1 wherein said mixer is a single balanced mixer for providing high level, sideband signal strength at all multiples in its operational band.
Claim 5
Dependent Claim
23 words
A homodyne multiplier as set forth in claim 1 wherein said mixer is a single ended mixer for providing selective low order sidebands.
Claim 6
Dependent Claim
42 words
A homodyne frequency multiplier as set forth in claim 1 and further comprising a phase shifter connected between the second input of said mixer and the second output of said hybrid for variable adjusting the phase relationship between the mixer input signals.
Claim 7
Dependent Claim
33 words
A homodyne frequency multiplier as set forth in claim 5 wherein said mixer is a double-banded mixer for multiplying up by even valued multiples while suppressing odd valued mutiples of the output signal.
Claim 8
Dependent Claim
77 words
In a homodyne multiplier having a single signal source coupled to both inputs of a frequency mixer, a method of frequency multiplication comprising the steps of: generating a preselected output frequency signal by said signal source, splitting the output signal into two distinct signal branches, separately adjusting the amplitude of respective signals for providing signal parameter adjustment of each branch, and mixing the respective branch signals in a frequency mixer for pRoviding a homodyne output signal spectrum.
Claim 9
Dependent Claim
77 words
In a homodyne multiplier having a single signal source coupled to both inputs of a frequency mixer, a method of frequency multiplication comprising the steps of: generating a preselected output frequency signal by said signal source, splitting the output signal into two distinct signal branches, separately adjusting the amplitude of respective signals for providing signal parameter adjustment of each branch, and mixing the respective branch signals in a frequency mixer for pRoviding a homodyne output signal spectrum.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |