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This paper presents a kinetic theory of TW gyro-peniotron in a rectangular waveguide based on an equilibrium distribution function ƒ[sub 0] = ƒ[sub 0](P[sub ⊥, P[sub z], X[sub θ, Y[sub θ). The influence of guiding centre of electrons and cyclotron harmonic number on beam-wave interaction is discussed. [ABSTRACT FROM AUTHOR]

This paper proposes a new kind of device operating at short millimetre wavelength, in which RF radiation generation is based on the interaction of a beam of sub-relativistic gyrating electrons and the RF standing-wave field of a quasioptical resonator. This device can be called 'quasi-optical gyro-peniotron' because it is similar in electron-beam configuration, microwave circuitry and cyclotron resonance properties to the quasi-optical gyrotron and in its operational mechanism to the peniotron. Starting from relativistic equations of motion for the electrons, the calculation formulae are derived. Using computer simulation, a beam-wave interaction efficiency of 43% is obtained for the third cyclotron harmonic at frequency 100GHz, beam voltage 80 kV and the applied magnetic field 13.3 kG, indicating that this tube will be potentially a high-efficiency high-power source not requiring a superconduction magnet system even within the 150 GHz band. [ABSTRACT FROM AUTHOR]

In this paper, based on several mathematical and physical considerations, the conditions which must hold for the field profile function of a microwave open resonator are derived. These conditions are important for finding the cavity geometry for a given field profile in an open resonator. The synthesis of microwave open resonators is developed here. The method can be used to deduce the cavity geometry from the given cavity field profile at a resonance frequency and cavity Q-value for a mode. As an example, this method is applied to the asymmetric triangle field profile. The basic procedure for designing a cavity structure of this kind is proposed. This synthesis method is simple, straightforward and suited to extensive applications. [ABSTRACT FROM AUTHOR]