Accession Number : ADD012034

Title :   Wide-Band Gyrotron Traveling-Wave Amplifier.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Lau,Yue-Ying ; Chu,Kwo R ; Granatstein,Victor L ; Barnett,Larry R

Report Date : 06 Aug 1985

Pagination or Media Count : 11

Abstract : A high power amplifier for amplifying millimeter-wave radiation comprising: a length of metallic waveguide tapered from a small cross-sectional end to a larger cross-sectional end; a magnetron-type electron injection gun for injecting a spiral beam of relativistic electrons at the small end of the waveguide for propagation axially therein so that the wall radius of the tapered waveguide increases in the downstream direction of the electron beam; an input coupler for launching electromagnetic waves to be amplified into the waveguide at the large waveguide end thereof such that the individual frequencies in the input waves are reflected at various points along the constriction of the waveguide taper so that they copropagate with and are amplified by the electron beam; and a magnetic circuit for generating an axial magnetic field within the tapered waveguide with a unique profile to maintain synchronism. This device has been found experimentally to have negligible launching loss and low sensitivity to electron velocity spread.

Descriptors :   *PATENTS, *GYROTRONS, *TRAVELING WAVE TUBES, *POWER AMPLIFIERS, RADIUS(MEASURE), ELECTRON BEAMS, MAGNETIC FIELDS, ELECTROMAGNETIC RADIATION, CROSS SECTIONS, HIGH POWER, MILLIMETER WAVES, MAGNETIC FIELDS, WAVEGUIDES, LAUNCHING, METALS, DOWNSTREAM FLOW, WAVES, LENGTH, COUPLERS, LOW LEVEL, LOSSES, WALLS, INPUT, SENSITIVITY, AXES, VELOCITY

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE