Cavity resonance absorption in ultra-high bandwidth CRT deflection structure by a resistive load
An improved ultra-high bandwidth helical coil deflection structure for a cathode ray tube is described comprising a first metal member having a bore therein, the metal walls of which form a first ground plane; a second metal member coaxially mounted in the bore of the first metal member and forming a second ground plane; a helical deflection coil coaxially mounted within the bore between the two ground planes; and a resistive load disposed in one end of the bore and electrically connected to the first and second ground planes, the resistive load having an impedance substantially equal to the characteristic impedance of the coaxial line formed by the two coaxial ground planes to inhibit cavity resonance in the structure within the ultra-high bandwidth of operation. Preferably, the resistive load comprises a carbon film on a surface of an end plug in one end of the bore.
- DOE Contract Number:
- AC08-88NV10617
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- A; US 5210464
- Application Number:
- PPN: US 7-700286
- OSTI ID:
- 6291115
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
426000* -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
CARBON
CATHODE RAY TUBES
COMPUTER OUTPUT DEVICES
COMPUTER-GRAPHICS DEVICES
CONFIGURATION
DESIGN
DISPLAY DEVICES
ELECTRIC COILS
ELECTRIC IMPEDANCE
ELECTRICAL EQUIPMENT
ELECTRON TUBES
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FILMS
HELICAL CONFIGURATION
IMAGE TUBES
IMPEDANCE
NONMETALS
OSCILLOGRAPHS
RESISTORS
THIN FILMS