Coaxial Load for Absorbing High-Power Voltage Pulses Modulated by Microwave Oscillations

The article discusses several design options for a coaxial matched load operating in the range from 0 to 2 GHz. Ceramic thin-film resistors, series-connected carbon fiber tubes of a special design, and a cylindrical load made of polymer material placed in a caprolon case were used as resistors. The materials and design of the loads were selected in such a way that the DC load resistance was about 23 Ω, which corresponds to the wave resistance of the tested nonlinear gyromagnetic line. It is shown that various versions of resistors, together with the volume of a conductive liquid such as water, can be used as an element that absorbs video and radio pulses in laboratory samples of high-power gyromagnetic lines. During the experiments, it was found that, depending on the amplitude of the signals incident on the line, the loads behave differently. It is also shown that these load cases have high electrical strength and can be used in systems with a pulse repetition rate reaching tens of Hertz.