Author: Pervak Evhen
Supervisor: Nelin Evhen
ELK: Second level of higher education (master degree)
Speciality: 172 Telecommunications and Radio Engineering
Summary: The acuity of work is determined by the need to improve the structural and electrical parameters of microstrip low pass filters taking into account the constant growth of requirements to radio systems where they are used.The purpose — to improve the selective properties of low pass microstrip filters.Tasks of the research:1. The calculate the low frequency filter of the fifth order based on two- and three-dimensional inhomogeneities.2. The develop visual models and filter modeling in the software package CST Microwave Studio.3. Compare characteristics of filters with variants of implementation of capacity in the form of sections and stubs.Object of research — microstrip low pass filters based on electromagnetic-crystal inhomogeneities.Subject of research — characteristics of low pass filters based on electromagnetic-crystal inhomogeneities.Scientific novelty of work:1. It is established that the frequency selectivity of a filter based on three-dimensional heterogeneities is higher than filters based on the two-dimensional.2. Proposed technical solution for a significant improvement in the stopband of filters, whisch based on capacitive loops.
Keywords: microstrip line, low pass filter, capacitive stubs, electromagnetic-crystal inhomogeneities, three-dimensional modeling, characteristics of filters, quasi-lumped elements.
The work consists of: 88 pages of explanatory note and 2 appendix
Explanatory note: Full text