Design of a compact microwave-absorbing load based on sintered material FeSiAl

Abstract

Abstract The dummy load in the terminal of traveling wave tubes is an important component of compact high-power electron linear accelerators. To develop high-power loads and miniaturize the accelerators, a microwave-absorbing material FeSiAl coated by a special sintering process is employed to enhance the efficiency of attenuation. Based on the method of multistate and multithickness, the complex permittivity and permeability of the material FeSiAl was obtained. And the design of a compact S-band dummy load was done by means of an engineering design and analysis system. With a very short length of less than 250mm, this dummy load is able to dissipate 10kW residual power to ensure the security of the accelerator. It can provide an important reference for the design of the high-power compact dummy load.