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US 5,691,667 AGranted
RF radiation absorbing material disposed between the cathode and anode of an electron beam tube
AssigneeEnglish Electric Valve Company Limited
InventorsAlan Hugh Pickering, Geoffrey John Rowlands, Roy Heppinstall, Edward Stanley Sobieradzki, Geoffrey Thomas Clayworth
Life of this patent
Estimating the term…
Abstract
An r.f. radiation absorbing material able to hold off a 30 to 40 kV voltage difference is described as formed by a silicon rubber loaded with ferrite particles. The material is used to reduce self-oscillation in amplifiers.
Claims17
A klystron comprising:
- an electron gun for generating an electron beam along an electron beam path, said electron gun comprising a cathode and an anode;
- an r.f. radiation absorbing material comprising a mixture of silicone rubber and ferrite particles surrounding said electron beam path between said cathode and said anode and arranged to provide electrical insulation between first and second parts of said klystron, said first part including said cathode and said second part including said anode, said first and second parts being at different voltages when in use;
- means coupled to said klystron for applying a high frequency signal to be amplified thereto;
- means coupled to said klystron for modulating said electron beam with said signal to produce an amplified signal;
- and means coupled to said klystron for extracting said amplified signal therefrom.
2 more elements
An inductive output tube amplifier comprising:
- an electron gun for generating an electron beam along an electron beam path, said electron gun comprising a cathode, an anode and a grid located therebetween;
- an r.f. radiation absorbing material comprising a mixture of silicone rubber and ferrite particles surrounding said electron beam path between said cathode and said anode and arranged to provide electrical insulation between first and second parts of said tube, said first part including said cathode and said second part including said anode, said first and second parts being at different voltages when in use;
- means coupled to said amplifier for applying a high frequency signal to be amplified thereto;
- means coupled to said amplifier for modulating said electron beam with said signal to produce an amplified signal;
- and means coupled to said amplifier for extracting said amplified signal therefrom.
2 more elements
An electron beam tube comprising:
- an electron gun for generating an electron beam along an electron beam path, said electron gun comprising a cathode and an anode;
- and an r.f. radiation absorbing material comprising a mixture of silicone rubber and ferrite particles, said material surrounding said electron beam path between said cathode and said anode and arranged to provide electrical insulation between first and second parts of said tube, said first part including said cathode and the second part including said anode said first and second parts being at different voltages when in use.
An electron beam tube amplifying arrangement comprising:
- an electron gun for generating an electron beam along an electron beam path, said electron gun comprising a cathode and an anode;
- an r.f. radiation absorbing material comprising a mixture of silicone rubber and ferrite particles surrounding said electron beam path between said cathode and said anode and arranged to provide electrical insulation between first and second parts of said tube, said first part including said anode and said second part including said cathode, said first and second parts being at different voltages when in use;
- means coupled to said tube for applying a high frequency signal to be amplified thereto;
- means coupled to said tube for modulating said electron beam with said signal to produce an amplified signal;
- and means coupled to said tube for extracting said amplified signal from said arrangement.
2 more elements
Dependencies are inferred from the claim text.