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Kowalczyk; Richard Donald
San Mateo, CA
No. of patents:

Patent Number Title Of Patent Date Issued
8018158 Method and apparatus for interaction with a modulated off-axis electron beam September 13, 2011
An output circuit for a microwave tube is provided that has generally high interaction impedance for good efficiency, has high average power capability, and is physically large for a given operating frequency. The output circuit is designed to operate in conjunction with an off-axis,
7782130 Bowtie deflector cavity for a linear beam device August 24, 2010
A resonant cavity with a bowtie shape supports an electromagnetic field used to deflect the trajectory of an electron beam passing through the cavity. The short transit time of the beam across the gap maintains the cavity fields at near-optimal phase, improving interaction efficiency
7688132 Method and apparatus for RF input coupling for inductive output tubes and other emission gated d March 30, 2010
An input circuit of a microwave amplification tube achieves improved instantaneous bandwidth. By directly coupling the transmission line carrying a modulating radio frequency signal to a control grid, a low-Q input circuit is created that increases the fractional bandwidth of the sys
7639785 Compact scanned electron-beam x-ray source December 29, 2009
A compact, reliable scanning electron-beam x-ray source achieves reduced complexity and cost. In particular, the x-ray source includes an electron beam that is propagated parallel to an x-ray target and is swept across the target in response to a moving magnetic cross field. Rather than
7638946 Apparatus and method for trajectory modulation of an electron beam December 29, 2009
An electron beam amplification device provides trajectory modulation of an electron beam, and includes an electron gun, a modulator, an interceptor, an output circuit, and a collector. The electron gun produces an electron beam. The modulator receives an RF input signal and provides a

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