Parametric optimization of the cables with the modal filtration effect

Abstract

The work presents the results of simulation and optimization of multiconductor modal filters with a circular cross section. Four 2–5 conductor structures with a circular cross-section were considered. Optimization was performed according to the amplitude and time criteria. As a result, a complete decomposition of the exciting interference signal was achieved in all structures with a maximum attenuation of 4.18 times.

Optimization of protective cables in the range of real geometric parameters

“…Table 1 presents the main characteristics of the MF 1-5 after HSopt. Since MF 1 has only the active and passive conductor, a CD is obtained without changing the conductor coordinate arrangement (regarding to [7,8]). Figure 2a shows that 2 pulses of half the amplitude (with respect to Uin) come to the end of the MF 1.…”

“…After HSopt of MF 2 in the range of real geometrical parameters, the conductor coordinate arrangement also remained unchanged (regarding to [7,8]). To improve the device performance, the size of the internal dielectric was reduced and the size of the external dielectric was increased.…”

“…After HSopt of MF 3 shown in Figure 1c, analogous to MF 1, we did not require to change conductor coordinate arrangement (regarding to [7,8]). Since preliminary optimization was performed in [7,8], a different coupling between the active and two passive conductors was achieved in advance. Because of the shield, CD could only be obtained by distancing it far enough from the external dielectric.…”

“…Finally, the time response to the pulse excitation was computed. For the simulation, we chose MF configurations that had been previously studied in [7,8]. Figure 1 shows CS of the structures after optimization by heuristic search (HSopt), where εri is the relative dielectric permittivity of the insulation and ri is the radius of the CS element.…”