Inductively coupled pulsed RF voltage multiplier
First Claim
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1. A method for generating a pulsed radio frequency (RF) waveform, comprising:
- voltage multiplying a DC charging voltage by;
supplying the DC charging voltage to respective capacitors of a plurality of switching stages that are electrically coupled to one another in parallel, each of the switching stages including a switching stage capacitor, a switching stage inductor, and a switch; and
discharging the capacitors by concurrently switching the switches of each of the plurality of switching stages from an electrically non-conducting state to an electrically conducting state; and
inductively coupling each of the plurality of switching stages to a resonant circuit through a plurality of transformers, each of the transformers having a primary winding electrically coupled to a respective switching stage and a secondary winding electrically coupled in series to one another and to the resonant circuit,wherein the resonant circuit includes an inductor and a capacitor electrically coupled in series to the secondary windings of the transformers.
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Abstract
Systems and methods for increasing the RF power switched into a resonant load by achieving voltage multiplication by means of coupled inductors are provided herein. In one approach, the RF electromagnetic wave achieved by voltage multiplication is used to drive a diode opening switch in order to create a fast rising, unipolar electrical pulse.
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Citations
18 Claims
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1. A method for generating a pulsed radio frequency (RF) waveform, comprising:
voltage multiplying a DC charging voltage by; supplying the DC charging voltage to respective capacitors of a plurality of switching stages that are electrically coupled to one another in parallel, each of the switching stages including a switching stage capacitor, a switching stage inductor, and a switch; and discharging the capacitors by concurrently switching the switches of each of the plurality of switching stages from an electrically non-conducting state to an electrically conducting state; and inductively coupling each of the plurality of switching stages to a resonant circuit through a plurality of transformers, each of the transformers having a primary winding electrically coupled to a respective switching stage and a secondary winding electrically coupled in series to one another and to the resonant circuit, wherein the resonant circuit includes an inductor and a capacitor electrically coupled in series to the secondary windings of the transformers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for generating a pulsed radio frequency (RF) waveform, the method comprising:
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voltage multiplying a DC charging voltage by; supplying the DC charging voltage to respective capacitors of a plurality of switching stages that are electrically coupled to one another in parallel, each of the switching stages including a switching stage capacitor, a switching stage inductor, and a switch; and discharging the capacitors by concurrently switching the switches of each of the plurality of switching stages from an electrically non-conducting state to an electrically conducting state; and inductively coupling each of the plurality of switching stages to a resonant circuit through a plurality of transformers, each of the transformers having a primary winding electrically coupled to a respective switching stage and a secondary winding electrically coupled in series to one another and to the resonant circuit, generating a pulsed RF waveform by the inductively coupling each of the plurality of switching stages to the resonant circuit through the plurality of transformers; and driving an opening switch with the pulsed RF waveform to convert RF energy of the pulsed RF waveform into a unipolar pulse. - View Dependent Claims (12, 13)
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14. An inductively coupled pulsed radio frequency (RF) voltage multiplier circuit, comprising:
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a plurality of switching circuits coupled to one another in parallel, each of the switching circuits including; a switching circuit capacitor, a switching circuit inductor, and a switch; a plurality of transformers, each of the transformers having a respective primary winding electrically coupled to a respective one of the switching circuits; and a resonant circuit inductively coupled to the plurality of switching circuits through secondary windings of each of the plurality of transformers, the secondary windings of the plurality of transformers being electrically coupled to one another in series, wherein the resonant circuit includes an inductor and a capacitor electrically coupled in series to the secondary windings of the plurality of transformers. - View Dependent Claims (15, 16, 17, 18)
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Specification