Phase and frequency locked magnetron
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United States of America Patent
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Jan 7, 2014
Grant Date -
Oct 20, 2011
app pub date -
Oct 20, 2010
filing date -
Oct 20, 2009
priority date (Note) -
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Abstract
A magnetron of improved performance capable of stabilizing the frequency and phase of magnetron output for use in particle accelerators and other applications. Thin variable-permeability blocks are attached inside the resonant anode structures of a standard magnetron design. A variable bias electromagnet, with field orthogonal in direction to the RF magnetic field, is used to vary the permeability of each block and therefore the resonant frequency of each anode structure. An electronic feedback control circuit adjusts the bias magnetic fields to lock in the frequency and phase of the magnetron output to an external low-level reference signal. Such devices may be used to provide synchronized high-power RF to many locations (e.g. the RF cavities of a particle accelerator), while requiring the distribution only of electrical power and an appropriate low-level RF reference signal.
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