Home         Authors   Papers   Year of conference   Themes   Organizations        To MES conference

The Influence of the Mismatch in the Structure with Strong Modal Distortions on Signal Integrity
Authors
	Zhechev Y.S.
	Kosteletskii V.P.
	Zabolotsky A.M.
Date of publication
	2021
DOI
	10.31114/2078-7707-2021-4-162-168
Abstract
	In this paper, the authors investigate the effect the structure matching has on the integrity of a useful signal on the example of a two-conductor coupled microstrip line with strong modal distortions. The transmission coefficients, data-dependent phases, and amplitude jitters of the structure were simulated in the matched configuration, as well as in the line with weak and strong mismatch, using electrodynamic approach. The influence of passive conductor mismatch of the two-conductor modal filter was analyzed on the probability of bit errors caused by inter-symbol interference in the data transmission system, which resulted from the changes in the termination loads at the near and far ends of the passive conductor. The investigated modal filter configurations have the properties of low-pass filters and provide the protection of critical radio-electronic equipment from conducted interference of short duration. The eye diagrams show that the matched configuration clearly shows the tran-sition from one logic level to another. The transition is poorly distinguishable in the mismatched configuration. It should be noted that the eye diagram allows for the qualitative de-termination of signal integrity. Based on the results of calculating the probability of bit errors for all the configurations, we can conclude that the mismatch of the passive conductor leads to a significant increase in bit error rate, i.e. adversely affects useful signal integrity. One possible way to minimize phase and amplitude deviations in the transmission line could be matching one end of the passive conductor. The reflected waves will dissipate on the resistor, hence reducing the standing wave coefficient. Thus, for the first time, the effect of the passive conductor mismatch in a two-conductor modal filter is analyzed with respect to useful signal integrity. An experimental study is planned for the future.
Keywords
	microstrip transmission line, useful signal, data-dependent jitter, bit error rate, modal distortion, modal filter.
Library reference
	Zhechev Y.S., Kosteletskii V.P., Zabolotsky A.M. The Influence of the Mismatch in the Structure with Strong Modal Distortions on Signal Integrity // Problems of Perspective Micro- and Nanoelectronic Systems Development - 2021. Issue 4. P. 162-168. doi:10.31114/2078-7707-2021-4-162-168
URL of paper
	http://www.mes-conference.ru/data/year2021/pdf/D063.pdf