Multiple stage depressed collector (MSDC) klystron based amplifier for ground based satellite and terrestrial communications
AssigneeCommunications and Power Industries, Inc., Satcom Division
InventorsMichael J. Cascone, Eric Oiesen
Life of this patent
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Abstract
A klystron tube for amplifying signals at microwave radio frequencies utilizes an electron source for emitting electrons through a field focused by a high energy magnet in the RF section of the tube. After the electrons have passed through the active area of the tube, the electrons strike the collector which, in this case, is a multistage depressed collector. The multistages of the depressed collector are connected to high energy voltage sources of different potentials. The klystron tube with the multistage depressed collector is uniquely used here for the first time in a ground based satellite or terrestrial communications system.
Claims18
A high power output vacuum electron device for use in a ground based satellite or terrestrial communications system comprising:
- a cathode for emitting a supply of electrons,
- an anode for attracting said electrons, said anode being constructed to allow said electrons to pass through said anode,
- an RF generator circuit in the path of said electron beam for generating RF signal energy in the presence of a high-voltage power source,
- a magnet surrounding said anode and said RF generation circuit for focusing said electrons into a collimated beam, and
- a collector for receiving the collimated electron beam and for returning the electrons to the cathode, said collector being a multistage depressed collector which is shielded from the magnetic field from said magnet, said vacuum electron device comprising a klystron.
A ground based satellite or terrestrial communications system utilizing a high power output vacuum electron device, said vacuum electron device comprising a klystron with a multistage depressed collector.
A ground based satellite or terrestrial communications system comprising:
- a klystron with a multistage depressed collector;
- a power supply for supplying power to said klystron;
- and
- a control system for controlling the operation of said ground based satellite or terrestrial communications system, said power supply, and said klystron.
In a ground based satellite or terrestrial communications system, a vacuum electron device including a source of electrons, said electrons being formed into a narrow beam, and a collector for collecting said electrons, a magnet surrounding and focusing said narrow beam, the magnetic flux of said magnet being parallel to and colinear with the centerline of said electron beam, said magnet having open pole pieces along said centerline to focus and drive said electron beam, said magnet having second open pole pieces adjacent to the area of said source of electrons to initially focus said electron beam, said magnet having no open pole pieces in the vicinity of said collector so that any magnetic flux from the magnet is directed back into the body of said magnet.
A gun only magnet utilized in a multistage depressed collector high-energy vacuum electron device comprising a first pole piece region generating magnetic flux adjacent a cathode of said vacuum electron device to drive and initially focus electrons emitted from said cathode, and a second pole piece region forming magnetic flux along the path of electrons to focus said electrons into a narrow beam, said magnet having no pole piece in the region of said vacuum electron device where the electrons are collected and returned to said cathode, said vacuum electron device comprising a klystron, the improvement comprising using said klystron in a ground based satellite communications or terrestrial communications system.
In a ground based satellite or terrestrial communications system, the improvement comprising:
- providing a klystron vacuum electron device, said device including a multistage depressed collector.
Dependencies are inferred from the claim text.