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One-criterion parametric optimization by genetic algorithm (GA) of air protective meander line turn cross-section is executed. For this task the quality function which provides geometric mean of wave impedances for even and odd modes of the line (Z) to be equal to the 50 Ω is formulated. All of 4 cross-section parameters of the investigated structure are simultaneously optimized. The results of 5...
Importance of research on specific aspects of ultrashort pulse propagation and voltage peak values localization along printed circuit board (PCB) multiconductor bus is highlighted. Simulation of a trapezoidal ultrashort pulse propagating along conductors of the bus with a different number of excited conductors, fixed variation of the whole ultrashort pulse duration (3; 0.3; 0.03 ns) and a duration...
The paper shows the possibility to increase the duration of ultrashort pulse which can be decomposed in the one turn meander delay lines. For this purpose, we suggested a condition that increases duration of ultrashort pulse up to a value that is equal to twice the product of the minimum of per-unit-length delays of even and odd modes of a signal and the length of half-turns. Simulation showed the...
An experimental confirmation of modal filtration based on multiconductor microstrip lines is executed. Authors designed four- and five-conductor prototypes of modal filters (MF), which have the maximum amplitude of the decomposition pulses of 12.6 and 15.3 times less in comparison with the initial signal. The results showed the prospect of research of multiconductor MF because addition of conductors...
The paper contains results of computation of time-domain response of an asymmetrical modal filter (MF) without resistors to ultrashort pulse excitation. Pulses, which are not resulted by reflections of even and odd mode, have been detected in the time-domain response of a MF for the first time. Quasistatic simulation in TALGAT software and electrodynamic simulation in CST MWS proved existence of these...
Paper considers improvement of the protection against ultrashort pulses by means of optimization of parameters of multiconductor microstrip lines by different criteria. We have obtained a three-conductor microstrip line with the maximized difference of delays between the first and the last decomposition pulses. It was achieved by means of expansion of time intervals between decomposition pulses. At...
A new method of lay-out of multilayer printed circuit boards for circuits with redundancy is considered. A structure with two conductors is considered; in this structure the initial interference pulse is decomposed into two pulses with fourfold lower amplitudes. The paper demonstrates the effect of the relative dielectric constant value of the sublayer between redundant and backup conductors on difference...
The paper analyzes influence of conductor and dielectric losses on the ultrashort pulse decomposition in a turn of meander microstrip line. The investigations revealed that losses in conductor have more significant influence on the amplitude and form of a pulsed signal than losses in dielectric. It is also shown that losses in conductor have more influence on the amplitude of odd mode pulse, while...
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