Cathode heater and cathode assembly for microwave power tubes

Details Cathode heater and cathode assembly for microwave power tubes Cathode heater and cathode assembly for microwave power tubes

1991-12-03

1994-09-27

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313340, H01J 2904, H01J 122

Patent

active

053509692

ABSTRACT:
A cathode heater includes a patterned conductor embedded within a dielectric substrate. The ceramic substrate has a pair of conductors over the respective surfaces thereof to provide electrical contact for the heater. To assemble the substrates having the conductors, the substrates and printed conductive patterns are fired to provide a composite multi-layer ceramic heater which can be used to heat cathode electrodes in microwave tubes such as travelling wave tubes.

REFERENCES:
patent: 3753025 (1973-08-01), van Stratum et al.
patent: 3803441 (1974-04-01), Ohsawa et al.
patent: 4053807 (1977-10-01), Aozuka et al.

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