A new type of traveling-wave deflection system

The analysis of the meander-line type of traveling-wave deflection system shows that the deficiency in the dispersion characteristics is due to the interaction of the electromagnetic field on a section of a finger with that on other fingers. Insertion of a shielding plate between two neighboring sections of the fingers reduces mutual interactions. The meander line with the shielding plate is called the trough-type traveling-wave deflection system. The analysis shows that uniform characteristics of the dispersion and the admittance with respect to the frequency are expected in the trough-type traveling-wave deflection system. Loading by the dielectric material of the space among electrodes serves to decrease the phase velocity and to increase the deflection sensitivity. In the experimental CRT in which the trough-type traveling-wave deflection system is used, a uniform sensitivity is confirmed experimentally in the frequency range from dc to above 4 GHz and the deflection of 6 mm by 10-mW input is measured.