Analysis of Helical Slow-Wave Structures for Modeling Helix Thickness Using an Improved Helical-Harmonics Approximation—Part II: Simulation Results

With the theory of an improved helical-harmonics approximation (HHA) presented in the first part of this paper, the numerical results of the method for helix slow-wave structures for different rod shapes and frequency bands are presented in this part. It is shown that this improved theory yields a more accurate model for considering the tape thickness than the tape-helix model and also the conventional HHA. Comparison of the results obtained using this improved HHA with those obtained from a commercial 3-D simulator, and also the experimental data further validate the technique.