Abstract A traveling wave tube is provided with a low-wave, electron beam interaction means in the form of a single wire conductor coiled into at least two parallel series of aligned turns; in each series, the turns are of identical size and configuration. In one form, all the turns have rectilinear stretches of equal length that are in a common plane; an electron beam source, a collector, a sole electrode and electric and magnetic fields direct a sheet beam alongside the rectilinear stretches outside the turns. In another form, the turns of the single wire conductor are almost entirely circular and in figure-eight configuration viewed endwise; electron beams are directed through either one or both series of turns. In still other forms of the invention, the slowwave means viewed endwise has more than two turns and the axes are coplanar or in a circular distribution.
In a traveling wave tube amplifier a slow-wave multi-coil of a single conductor that loops alternately clockwise and counterclockwise and from the longitudinal aspect intersects and crosses over itself between loops to form a plurality of series of aligned essentially circular loops wherein the number of loops in each of the plurality of series of loops is the same, and providing an equal plurality of interaction spaces, whereby RF conducted through the wire is accompanied by an electromagnetic wave that traverses the plurality of interaction spaces in unison, an evacuated envelope confining said coil therein, means supporting said coil in said envelope and being operable to attenuate backward wave energy, means for coupling one end of said wire to an RF source, means for coupling the other end of said wire to an RF load, electron beam source means being operable to project an electron beam through each of the plurality of series of aligned loops respectively, switch means controlling the electron beam source means to project any one or combination of beams, collector means for said beams, and field means for flowing projected electrons along said coil for interaction with an electromagnetic wave traversing said coil.
Claim 2
Dependent Claim
197 words
In a traveling wave tube amplifier a slow-wave multi-coil of a single conductor that loops alternately clockwise and counterclockwise and from the longitudinal aspect intersects and crosses over itself between loops to form a plurality of series of aligned essentially circular loops wherein the number of loops in each of the plurality of series of loops is the same, and providing an equal plurality of interaction spaces, whereby RF conducted through the wire is accompanied by an electromagnetic wave that traverses the plurality of interaction spaces in unison, an evacuated envelope confining said coil therein, means supporting said coil in said envelope and being operable to attenuate backward wave energy, means for coupling one end of said wire to an RF source, means for coupling the other end of said wire to an RF load, electron beam source means being operable to project an electron beam through each of the plurality of series of aligned loops respectively, switch means controlling the electron beam source means to project any one or combination of beams, collector means for said beams, and field means for flowing projected electrons along said coil for interaction with an electromagnetic wave traversing said coil.