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directions. The capacitors are charged with alternating polarity and when the switch (usually a triggered or free running spark gap in practice) is closed the voltage across every second capacitor rapidly inverts as a half cycle of oscillation at a frequency set by the capacitance resonating with the differential mode inductance of the chokes. At the same time the other capacitors discharge very slowly due to not having a differential current flowing to cancel the reactance. So after a half period, all the capacitors are in series and the voltages add. This arrangement has a conceptual equivalence to the spiral VIG, with the alternating capacitors being equivalent to the capacitance between the windings and the common mode chokes being equivalent to the inductance of a winding. Discrete components allow large lumped capacitors to be used thus storing much more energy, but have difficulty replicating the high voltage multiplication ratios and extremely short rise times of spiral transmission line types.
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Discrete component VIGs (pictured) consist of a stack of well-coupled common mode chokes interconnected with a stack of capacitors. The inductors present a high inductance to currents that are in-phase in the two windings, and a far lower inductance when the winding currents are flowing in opposite
88:, then after reflecting from the open end converts back to electrostatic field. A pulse of output amplitude 2nU (where n is the number of turns of the capacitor and U is the initial voltage it was charged to) and a rise time equal to twice the
32:) is an electric pulse compression and voltage multiplication device, allowing shaping a slower, lower voltage pulse to a narrower, higher-voltage one. VIGs are used in military technology, e.g. some
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can be attached to the VIG construction to modify its characteristics, typically lowering the resonant frequency and increasing the efficiency.
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A spiral VIG consists of four alternating conductor-insulator-conductor-insulator sheets, wound into a cylinder, forming a
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194:"Apparatus and method for generating high voltages using a voltage inversion generator and multiple closed-path ferrites"
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with practical upper limit of about 700 MHz, generating energy that can be radiated from a suitable
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163:"Completely explosive ultracompact high-voltage nanosecond pulse-generating system"
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VIGs are advantageous due to their simplicity and the very short pulse
36:, as a secondary stage of another pulsed power source, commonly an
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in range of nanoseconds. Some VIGs can be configured as part of a
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switch. The capacitor is charged from a power source, e.g. an
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of the transmission line. The device acts as a distributed
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discharge travels along the transmission line, converting
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A 3-stage discrete component vector inversion generator.
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223:"Findthatpatent Resources and Information"
38:explosive-driven ferroelectric generator
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68:, then the spark gap fires after its
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56:also acting as a single-ended
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26:vector inversion generator
281:Electric power conversion
133:The use of VIGs includes
255:"Spiral line oscillator"
135:directed-energy weapons
34:directed-energy weapons
227:www.findthatpatent.com
141:pulse power supplies,
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128:electromagnetic pulse
94:pulse forming network
86:electromagnetic field
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74:electromagnetic wave
82:electrostatic field
60:, connected to a
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145:generators, etc.
90:electrical length
70:breakdown voltage
58:transmission line
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78:electric spark
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286:Pulsed power
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198:the original
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177:. Retrieved
170:the original
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130:generators.
118:, acting as
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106:Applications
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44:Construction
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120:oscillators
275:Categories
260:2011-03-06
179:2010-01-16
149:References
112:rise times
241:"Unknown"
62:spark gap
54:capacitor
100:Ferrites
211:Unknown
124:antenna
143:plasma
173:(PDF)
166:(PDF)
139:x-ray
66:EDFEG
84:to
30:VIG
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