Title :
Multi-tone effect in a wideband helix traveling wave tube
Author :
Kim, Jung-Il ; Han, Seong-Tae ; Sinha, A.K. ; Park, Gun-Sik
Author_Institution :
Sch. of Phys., Seoul Nat. Univ., South Korea
Abstract :
Nonlinear phenomena occurred in a wideband helix traveling-wave-tube (TWT) which employed a multi-tone input signal is studied by the 2.5-D Particle-In-Cell (PIC) code, MAGIC, in a large-signal regime. The dielectric-loaded sheath helix slow-wave structure (SWS) is modeled by inhomogeneous loading approach. The nonlinearities are studied by Fourier analysis. The closer two-tone input signals, the more dominant summation frequency components. Otherwise, 3rd order intermodulation and second harmonic components are dominant.
Keywords :
Fourier analysis; harmonics; intermodulation; microwave tubes; simulation; travelling wave tubes; 2.5-D PIC code; Fourier analysis; MAGIC; dielectric-loaded sheath; electromagnetic field; electron beam; helix slow-wave structure; helix traveling-wave-tube; inhomogeneous loading approach; large-signal regime; multi-tone effect; multi-tone input signal; nonlinear phenomena; particle-in-cell code; second harmonic components; summation frequency components; third-order intermodulation; two-tone input signals; wideband helix TWT; Coaxial components; Dielectric constant; Electron beams; Electron emission; Impedance; Linearity; Load modeling; Permittivity; Space charge; Wideband;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002. 2002 3rd International Conference on
Print_ISBN :
0-7803-7486-X
DOI :
10.1109/ICMMT.2002.1187644
