US4121214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proximity fuze jammer
Assignee: United States Department of the Air Force
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Filing: 1969-12-16
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Granted: 1978-10-17
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Expires: 1989-12-16
Abstract
Abstract A system for jamming continuous wave radar type proximity fuzes used on surface-to-air missiles where the fuze requires an increase in return signal power level and a rapid frequency change for detonation. The system basically includes a receiver, amplifier, and transmitter. A received fuze signal is filtered and square wave modulated then sent to a first traveling wave tube for amplification. The signal is then amplified again by a second traveling wave tube which is modulated by a transit time modulator which continuously varies the phase shift through the tube in a linear fashion. The linear variation in phase shift is the equivalent of a displacement in the frequency signal being amplified. The signal is then reradiated to the missile giving the fuze a target sensing causing it to predetonate.
Inventors
- 👤 Richard E. Marinaccio
- 👤 Ward M. Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:15
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A method for predetonating missiles having proximity fuzes which radiate and receive electromagnetic energy comprising the steps of: receiving the electromagnetic radiation radiating from a fuze at a distance beyond the missile's effective warhead range; filtering the received signal to limit the signal to the fuze carrier and its modulated sidebands; square wave modulating the filtered signal; amplifying the modulated signal a first time; amplifying the modulated signal a second time, linearly varying the phase of the second amplified signal, and retransmitting the signal to the fuze at a distance beyond the missile's effective warhead range.
Claim 2
Independent Claim
96 words
A method for predetonating missiles having proximity fuzes which radiate and receive electromagnetic energy comprising the steps of: receiving the electromagnetic radiation radiating from a fuze at a distance beyond the missile's effective warhead range; filtering the received signal to limit the signal to the fuze carrier and its modulated sidebands; square wave modulating the filtered signal; amplifying the modulated signal a first time; amplifying the modulated signal a second time, linearly varying the phase of the second amplified signal, and retransmitting the signal to the fuze at a distance beyond the missile's effective warhead range.
Claim 3
Independent Claim
128 words
A system for predetonating missiles having proximity fuzes which radiate and receive electromagnetic energy comprising: means for receiving electromagnetic radiation emanating from a missile fuze beyond the effective range of the missile warhead, band pass filter means for selecting the desired frequency connected to the receiving means; switching means for alternatively interrupting the signal connected to the filter; multivibrator means connected to the switch means for a activating said means; a first traveling wave tube connected to the switch means for amplifying the filtered signal; a second traveling wave tube connected to said first tube; means connected to said second tube for causing a linear phase shift in the signal as it is amplified thereby effectively frequency adjusting the received signal, and means for retransmitting the received signal.
Claim 4
Independent Claim
128 words
A system for predetonating missiles having proximity fuzes which radiate and receive electromagnetic energy comprising: means for receiving electromagnetic radiation emanating from a missile fuze beyond the effective range of the missile warhead, band pass filter means for selecting the desired frequency connected to the receiving means; switching means for alternatively interrupting the signal connected to the filter; multivibrator means connected to the switch means for a activating said means; a first traveling wave tube connected to the switch means for amplifying the filtered signal; a second traveling wave tube connected to said first tube; means connected to said second tube for causing a linear phase shift in the signal as it is amplified thereby effectively frequency adjusting the received signal, and means for retransmitting the received signal.
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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |