Calculation of geometry of powerfull absorption loading for meter wave generator

The method for calculating geometry of cooled coaxial loads with complex inhomogeneous filling is considered. The law of variation of external conductor diameter providing for a high degree of loading matching with a coaxial feeder is proposed. Calculation and result of model tests of loads on the basis of UV1-50-51 commercial resistor with water cooling at 148.5MHz frequency are given as an example. Calculations were carried out on the basis of the theory of long lines taking into account construction reactivity at the load output and real characteristic of the distribution of length resistor resistance. During experimental study of the load mock-up in the frequency range from 50 to 240 MHz the calculated standing wave ratio did not exceed 1.05 with the measurement accuracy of the R4-11 device