Simulation of microwave devices with external cavities using MAGY

• Published in: IEEE transactions on plasma science Vol. 30; no. 3; pp. 1277 - 1291
• Main Authors: Vlasov, A.N., Antonsen, T.M., Chernin, D.P., Levush, B., Wright, E.L.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2002; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Beams (radiation); Coupling circuits; Electromagnetic waveguides; Electron beams; Electronics; Electrons; Equations; Holes; Klystrons; Laboratories; Mathematical analysis; Mathematical models; Microwave devices; Microwaves; Object oriented modeling; Optical coupling; Radio frequencies; Radio frequency; Resonators
• ISSN: 0093-3813; 1939-9375
• DOI: 10.1109/TPS.2002.801600

A self-consistent large-signal beam-field interaction model for vacuum electronic microwave sources with external cavities is described. The model includes a self-consistent solution of the three-dimensional equations of electron motion and the time-dependent field equations. The RF fields are decomposed into the fields inside the beam region and the fields inside outer resonators. The RF fields inside the beam region are represented as a superposition of local waveguide modes. The RF fields inside resonators are represented as a sum over resonator modes. The various modes are coupled together due to gaps connecting cavities with each other and with the beam region. The numerical implementation of the model requires additional analytical steps to obtain an effective, convergent, and stable numerical solution. The modified version of the code MAGY has been tested by a comparison with known results and also with measured data.