Low noise crossed-field amplifier
AssigneeGuilford R. MacPhail
InventorsGuilford R. MacPhail, Chris L. Wheeland, Edward M. Doyle
Life of this patent
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Abstract
In a forward wave low noise cross-field amplifier a slow wave structure is disposed about a predetermined portion of the cathode. The slow wave structure of the cathode is accurately proportioned and spaced to have a dispersion curve near to the dispersion of the slow wave structure of the anode to permit cross-coupling of the RF input from the slow wave structure of the anode to the slow wave structure of the cathode.
Claims12
A low noise crossed-field amplifier of the type having an anode and a cathode, and being charged with a pulsed voltage potential to create an electric field across a magnetic field in an interaction area, said crossed-field amplifier comprising:
- a first slow wave structure disposed about the anode, said first slow wave structure receiving an RF input and comprising a first plurality of extending vanes having a first helical coil means for dispersing RF waves disposed thereabout;
- a second slow wave structure disposed about the cathode in opposing relationship to said first slow wave structure, said second slow wave structure comprising a second plurality of extending vanes having a second helical coil means for dispersing RF waves disposed thereabout;
- said second plurality of vanes and said second helical coil means of said second slow wave structure being accurately proportioned and spaced about said cathode to have a dispersion curve near enough to a dispersion curve of said first slow wave structure to permit said RF input to cross-couple to the slow wave structure of said cathode.
A low noise crossed-field amplifier of the type having an anode and a cathode, and being charged with a pulsed voltage potential to create an electric field across a magnetic field in an interaction area, said crossed-field amplifier comprising:
- a first slow wave structure disposed about the anode, said first slow wave structure comprising a first plurality of extending vanes, said first plurality of vanes having an upper region and a lower region, and a pair of helical coils disposed, respectively, about said upper region and said lower region of said first plurality of vanes;
- a second slow wave structure disposed about the cathode in opposing relationship to said first slow wave structure, said second slow wave structure comprising a second plurality of extending vanes having an upper region and a lower region, and a second pair of helical coils disposed, respectively, about said upper region and said lower region of said second plurality of vanes;
- said first plurality of vanes and said first pair of helical coils of said second slow wave structure being accurately proportioned and spaced to have a dispersion curve substantially equal to -the- dispersion curve of said second plurality of vanes and said second pair of helical coils.
Dependencies are inferred from the claim text.