US3921028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for observing waveform of microwave signal
Assignee: The University of Osaka
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Filing: 1974-03-14
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Granted: 1975-11-18
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Expires: 1994-03-14
Abstract
Abstract Apparatus for displaying the waveform of a microwave signal which embodies means for producing an electron beam, deflecting said beam in synchronism with the microwave signal and permitting transmission of the beam only when it is subjected to a predetermined deflection to form a pulsed beam. Deflecting the pulsed beam by a second deflecting signal synchronized with the microwave signal while varying the phase difference by a third signal and then displaying the effect of deflection by the second signal on one axis of the display means and controlling the sweep of the other axis of the display means by said third signal.
Inventors
- 👤 Kazuo Fujisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:09
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/34; G01R13/342; H; H01; H01J; H01J25/00; H01J25/78
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
211 words
A device for observing the waveform of a microwave signal comprising a source of said microwave signal, means producing a continuous electron beam, first beam deflecting means, means producing a first waveform signal synchronous with the microwave signal to be observed, means connecting the last said means with said first deflecting means for deflecting said beam (in one plane), shutter means positioned forwardly of said first deflecting means for permitting said beam to pass when said deflection is within predetermined limits thereby producing a pulsed electron beam, second beam deflecting means following said shutter means for deflecting said beam (in said plane), a second means producing a second waveform signal in the form of and synchronous with said microwave signal, means producing a third waveform signal, phase shifting means for varying the phase between said first and second waveform signals with respect to said electron beam and under control of said third waveform signal, means applying said second waveform signal to said second beam deflecting means, display means in the path of and responsive to said beam for displaying the movement of said beam wherein the deflection produced by said second deflecting means occurs along the phenomenon axis and means for sweeping said beam in synchronism with said third waveform signal.
Claim 2
Independent Claim
211 words
A device for observing the waveform of a microwave signal comprising a source of said microwave signal, means producing a continuous electron beam, first beam deflecting means, means producing a first waveform signal synchronous with the microwave signal to be observed, means connecting the last said means with said first deflecting means for deflecting said beam (in one plane), shutter means positioned forwardly of said first deflecting means for permitting said beam to pass when said deflection is within predetermined limits thereby producing a pulsed electron beam, second beam deflecting means following said shutter means for deflecting said beam (in said plane), a second means producing a second waveform signal in the form of and synchronous with said microwave signal, means producing a third waveform signal, phase shifting means for varying the phase between said first and second waveform signals with respect to said electron beam and under control of said third waveform signal, means applying said second waveform signal to said second beam deflecting means, display means in the path of and responsive to said beam for displaying the movement of said beam wherein the deflection produced by said second deflecting means occurs along the phenomenon axis and means for sweeping said beam in synchronism with said third waveform signal.
Claim 3
Dependent Claim
44 words
The device according to claim 1, wherein said first deflecting means comprises a pair of parallel conductors to which said microwave signal is applied, and said shutter means comprises a flat electrode having an orifice therein and located in front of said parallel conductors.
Claim 4
Dependent Claim
41 words
The device according to claim 1, wherein said phase shifting means comprises a tubular electrode positioned between said first deflecting means and said shutter means with said electron beam passing therethrough and said third waveform is applied to said tubular electrode.
Claim 5
Dependent Claim
80 words
The device according to claim 1, wherein said second deflecting means comprises a helical travelling wave conductor to which said second waveform is applied and means for deflecting said pulsed electron beam in a second plane angularly disposed relative to the first said plane, and said display means comprises a cylindrical display screen and means of applying a rotational field to said electron beam in synchronism with said third waveform thereby effecting a circumferential time axis sweep on said screen.
Claim 6
Dependent Claim
59 words
The device according to claim 1, wherein said display means comprises means for producing a voltage corresponding to the deflection effected by said second deflecting means, means interconnected with the last said voltage for cancelling said deflection, and a display device having a phenomenon axis sweep controlled by said voltage and time axis sweep controlled by said third waveform.
Claim 7
Dependent Claim
71 words
The device according to claim 5, wherein said voltage producing means comprises at least one electrode for collecting said electron beam encountering a predetermined deflection and a resistor connected to said electrode, and said deflection cancelling means comprises at least one deflection electrode for deflecting said electron beam opposite to the deflection effected by said second deflecting means under control of a voltage corresponding to a voltage produced across said resistor.
References Cited (Backward Citations)
US3378721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |