Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure
Patent
1977-10-07
1979-06-12
Chatmon, Jr., Saxfield
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Combined cathode ray tube and circuit element structure
315 36, 315 393, 330 43, H01J 2534
Patent
active
041581547
ABSTRACT:
A delay line for transit time amplifier tubes which has a filter characteristic with a negative dispersion in the fundamental wave of the longest pass band, i.e. the operating band, in the form of a hollow conductor which is provided with successive transverse walls, each of which is provided with an electron beam opening and a coupling slot, and an attenuation path which is provided with lossy material, in the zone of which at least one of the line dimensions which determines the two cutoff frequencies of the operating band is so increased that, in the attenuation path, at least one of the two cutoff frequencies of the operating band possesses at least the same distance from the band center as in the remainder of the delay line, with the operating band being determined by the dimensions of the coupling slots, while in the attenuation zone, in which primarily the electric fields of the line wave are attenuated ("field attenuation"), the coupling slots are reduced in size in the region of the attenuation path in such manner that the upper cutoff frequency of the operating band is at least equal to that in the remainder of the delay line. Preferably, annular transverse partition walls are in each case disposed between adjacent transverse walls, with the inner diameters of the partition walls being additionally increased in the area of the attenuation path.
REFERENCES:
patent: 3274428 (1966-09-01), Harris
patent: 3576460 (1971-04-01), Harman
patent: 3846664 (1974-11-01), King et al.
patent: 4013917 (1977-03-01), Horigome et al.
patent: 4053810 (1977-10-01), James
patent: 4066927 (1978-01-01), Gross
Chatmon, Jr. Saxfield
Siemens Aktiengesellschaft
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