Simulation of the axially symmetrical helical line/Asines simetrijos spiralines sistemos modeliavimas

Properties of the axially symmetrical helical line are considered in the paper. Models of systems based on the multi-conductor line method and the CST Microwave Studio software package are used. The expressions for the retardation factor and the input impedance of the system are derived using the multi-conductor line method. Analysis of the retardation factor allowed to show that there are possibilities to design simple axially symmetrical small-size helical systems having good dispersion properties and relatively small characteristic impedance. Simulation made using the CST Microwave Studio package confirmed the properties of the systems revealed using the multi-conductor line method. Synergy of various methods can be effectively used at analysis and design of wide-band periodic structures. Ill. 6, bibl. 10 (in English, summaries in English, Russian and Lithuanian). [TEXT NOT REPRODUCIBLE IN ASCII] Nagrinejamos savybes sistemos, sudarytos is dvieju ekranuotu spiraliu, kuriu elementai simetriski asies atzvilgiu. Sudarytas sistemos modelis. Analizei panaudotas daugialaidziu liniju metodas ir programu paketas CST Microwave Studio. Isvestos letinimo koeficiento ir iejimo varzos israiskos. Remiantis letinimo koeficiento israiska ir skaiciavimu rezultatais parodyta, kad galima sukurti mazu matmenu sistemas, pasizymincias geromis dispersinemis savybemis ir reikiama bangine varza. Skaiciavimai, atlikti taikant programu paketa CST Microwave Studio, patvirtino isvadas, padarytas remiantis daugialaidziu liniju metodu. Tiriant ir projektuojant placiajuostes periodines sistemas verta, isnaudoti daugialaidziu liniju metodo ir pasirinkto komercinio programu paketo sinergija. Il. 6, bibl. 10 (anglu kalba; santraukos anglu, rusu ir lietuviu k.).