US3612899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generator for short-duration high-frequency pulse signals
Assignee: Unisys Corp
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Filing: 1970-08-20
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Granted: 1971-10-12
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Expires: 1990-08-20
Abstract
Abstract Very narrow pulses of high-frequency sine wave electromagnetic energy are formed by use of a gated or pulse modulated continuous-wave source feeding a transmission line network having a time-limited impulse response and adjusted to provide a series resonance with the leakage capacity of the source gating or modulating switch for the purpose of assuring that a maximum of the available energy is employed to form the output and that the output level is nulled before and after the generation of the high-frequency pulse.
Inventors
- 👤 Gerald F Ross
- 👤 Joseph D De Lorenzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:15
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/80
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
Apparatus for generation of short duration high-frequency time-limited pulses having abrupt initial rise and terminal fall characteristics comprising: first high-frequency transmission line means having a predetermined characteristic impedance Zo and input and output means, high-frequency sine wave oscillator means for supplying a train of high-frequency sine wave cycles at said input means, switch means having, when nonconducting, a leakage capacity Cs, for gating said oscillator means, matched utilization means attached at said output means, open-circuited branch transmission line means joined to said first transmission line means at a distance dm therealong from said input means, said distance dm so adjusted as substantially to provoke resonance between said input means and the leakage capacitance Cs of said switch.
Claim 2
Dependent Claim
117 words
Apparatus for generation of short duration high-frequency time-limited pulses having abrupt initial rise and terminal fall characteristics comprising: first high-frequency transmission line means having a predetermined characteristic impedance Zo and input and output means, high-frequency sine wave oscillator means for supplying a train of high-frequency sine wave cycles at said input means, switch means having, when nonconducting, a leakage capacity Cs, for gating said oscillator means, matched utilization means attached at said output means, open-circuited branch transmission line means joined to said first transmission line means at a distance dm therealong from said input means, said distance dm so adjusted as substantially to provoke resonance between said input means and the leakage capacitance Cs of said switch.
Claim 3
Dependent Claim
35 words
Apparatus as described in claim 1 wherein said distance dm is adjusted so as to make the reactance of said first transmission line means substantially equal to the reactance of said switch means at resonance.
Claim 4
Dependent Claim
46 words
Apparatus as described in claim 1 wherein said distance dm is adjusted so as to make the driving point impedance of the network comprising said first transmission line means and said branch transmission line means substantially equal to the reactance of said switch means at resonance.
Claim 5
Dependent Claim
46 words
Apparatus as described in claim 1 wherein the quantity dm is defined substantially by the equation where: Beta 2 pi fo/c and where fo is the operating frequency of said oscillator means and c is the velocity of wave propagation is said first transmission line means.
Claim 6
Dependent Claim
37 words
Apparatus as described in claim 1 wherein said open-circuited branch transmission line means joined to said first transmission line means comprises radially extending coaxial transmission line means open-circuited at ends remote from said first transmission line means.
Claim 7
Dependent Claim
34 words
Apparatus as described in claim 5 wherein said open-circuited ends of said radially extending coaxial transmission line means remote from said first transmission line are joined one to the other in direct conductive relation.
References Cited (Backward Citations)
US3402370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |