By G. Mourier
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Extra info for Crossed-field Microwave Device. Principal Types of Crossed-Field Devices Analysis of Oscillator system Performances Regional Progress and Trends
4. P . N . BUTCHER, On the coupling impedance of tape structures. Congr. intern. "Tubes Hyper frequences," Paris, 1956. Travaux du Congres, Vol. 1, pp. 4 7 8 - 4 9 2 . 6. J . C . WALLING, Interdigital and other slow wave structures. / . Electronics and Control 3, 2 3 9 - 2 5 8 ( 1 9 5 7 ) ; Onde Elec. 3 7 , 13&-146 ( 1 9 5 7 ) . 3 Circuits for Traveling Wave Crossed-Field Tubes by J. ARNAUD I. The Interdigital Line A. General Relations B. Characteristics of Various Space Harmonics C. Coupling Impedance D .
III. IV. V. VI. VII. VIII. Fundamental Consideration about Delay Lines Floquet's Theorem Orthonormality Properties of the Modes Equality of the Magnetic and Electric Energies Stored in a Cell Space Harmonics Group Velocity and Energy Velocity The Reactance Theorem and Dispersion Perturbations by a Current—General Cases A. The Alternating Current of the Beam B. The Current Layer Equivalent to Another Delay Structure C. Perturbation by a Dielectric D . Induced Current in a Real Conductive Layer E.
However, some modifications can be m a d e which permit their use in an amplifier: essentially, t h e t w o combs are m a d e strongly dissimilar so t h a t t h e backward wave disappears in t h e regions where it could be harmful. T h e ra = + 1 harmonic is also a forward wave, b u t t h e associated field h a s t h e same distribution along t h e fingers as in t h e case for m = — 1. T h e dispersion is not zero b u t can be m a d e small if we use a ground plate near t h e line (see Fig. 2 ( b ) , d o t t e d line).