Calculation of beam loading using the induced-current method in passive cavities

Author

Rees, Daniel E. ; Carlsten, Bruce E. ; Humphries, Stanley, Jr. ; Tallerico, Paul J.

Author_Institution

Los Alamos Nat. Lab., NM, USA

Volume

40

Issue

8

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

1543

Lastpage

1548

Abstract

A method for calculating the loaded Q and beam detuning of a passive (gain or idler) cavity in an electron device is presented. It is based on the determination of induced current by a technique often referred to as Ramo´s theorem. The induced current is used in conjunction with a lumped equivalent circuit representing the cavity. This leads to a solution for the self-consistent cavity fields. Although the induced-current expression is usually developed from low-frequency models, it is shown that Ramo´s theorem is valid for high-frequency, steady-state analysis when the unloaded passive cavity Q is high. The method is used to calculate the loaded Q of the passive cavity of a new type of gyro-resonant electron device, the magnicon

Keywords

cavity resonators; equivalent circuits; gyrotrons; Ramo´s theorem; beam detuning; beam loading; electron device; gyro-resonant electron device; induced-current method; loaded Q; lumped equivalent circuit; magnicon; passive cavities; self-consistent cavity fields; steady-state analysis; unloaded passive cavity; Bandwidth; Electrodes; Electron devices; Equivalent circuits; Frequency; Impedance; Resonance; Steady-state; Tuning; Voltage;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.223717

Filename

223717