2-D large-signal modeling of an S-band CCT device using GATOR

GATOR is a multi-frequency, time-domain simulation code used to predict small- and large-signal performance of helix and coupled-cavity traveling-wave tubes (TWTs). For coupled-cavity TWTs (CCTWTs), GATOR makes use of the generalized Curnow Equivalent circuit parameters to represent the cavities. Any cavity structures, regardless of the cavity and slot shapes, can be represented using this code. The resistive loading of a cavity is included in the Equivalent Circuit Model by adding resistive components. The equivalent-circuit parameters can be extracted from GATOR itself by running the code in cold-test simulation mode or from any other equivalent-circuit programs. Measured or theoretical values of dispersion data are required when using any of the cold-test equivalent-circuit codes. Once the equivalent-circuit parameters are known for the entire traveling-wave-tube rf structure, GATOR can be used for hot-test simulation of the device to predict its small- or large-signal performance.