Abstract
In this paper, we propose the use of equivalent circuits for the band pass filter design with quasilumped resonators. The filter design procedure consists of several stages and the most time-consuming step is the one that assumes employment of 3D EM simulations. Although these simulations lead to the most accurate results, the analysis and synthesis of the filter can be simplified by using equivalent circuits of the 3D model elements and the complete filter structure, thereby keeping sufficient accuracy. The analysis of the properly developed equivalent circuits provides the possibility to quickly get the insight into the filter characteristics, and in this paper it is shown that they can be used to speed up the filter design procedure, as well.
Highlights
Prikazani filtar je dijakoptički razložen na nekoliko posebno modelovanih segmenata: kondenzator, vija, kalem, sprega uvodnika i kalema, sprega dva rezonatora
Sledeći korak je odreñivanje dimenzija kvazi-koncentrisanih elementa na osnovu vrijednosti elemenata optimalne zamjenske šeme
The analysis of the properly developed equivalent circuits provides the possibility to quickly get the insight into the filter characteristics, and in this paper it is shown that they can be used to speed up the filter design procedure, as well
Summary
U našim istraživanjima projektovani su filtri sa više tipova realizacije uvodnika i sprega izmeñu rezonatora i vrlo detaljno analizirane karakteristike predloženih rješenja. Zatim će biti projektovan cijeli filtar za centralnu učestanost od 2.4 GHz. Za realizaciju će se koristiti filtar sa dva spregnuta rezonatora i kapacitivna sprega uvodnika i kalema, prikazana na slici 1. Prikazani filtar je dijakoptički razložen na nekoliko posebno modelovanih segmenata: kondenzator, vija, kalem, sprega uvodnika i kalema, sprega dva rezonatora. Ta sprega se ostvaruje duž dvije stranice spoljnog dijela kalema, a ovde će biti aproksimirana odgovarajućom kapacitivnošću (CU) izmeñu presjeka 1 i 3 (1' i 3'). Induktivnost kalema sa gubicima predstavljena je serijskom granom (L1, L2, RL), pri čemu je kalem podijeljen na dva dijela L1 i L2 kako bi se adekvatno modelovala sprega sa uvodnikom u presjeku 3.
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