Title :
Myths in microwave filter theory
Author_Institution :
Inst. of Electron. Syst., Warsaw Univ. of Technol., Warsaw, Poland
Abstract :
In the microwave filter theory there are several concepts and ideas that can be considered as misleading or even false. In the paper some of the “mythical” concepts are addressed and explained. Coupling between resonators realized through ideal inverters is analyzed by means of eigenfrequency method and differences between inverters and their impact on coupling matrices are presented. The lossy ideal inverters are analyzed and it is shown that they are not passive. Coupled transmission lines are analyzed by means of coupled mode theory and non-physical properties of the traditional circuit model are shown.
Keywords :
coupled circuits; coupled transmission lines; eigenvalues and eigenfunctions; invertors; microwave filters; resonator filters; circuit model; coupled mode theory; coupled transmission lines; coupling matrices; eigenfrequency method; lossy ideal inverters; microwave filter theory; resonators; Couplings; Filtering theory; Inverters; Microwave circuits; Microwave filters; Resonator filters; Filter theory; coupled transmission lines; coupling coefficient; coupling matrix; ideal inverter; lossy filters;
Conference_Titel :
Microwaves, Radar, and Wireless Communication (MIKON), 2014 20th International Conference on
Conference_Location :
Gdansk
Print_ISBN :
978-617-607-553-0
DOI :
10.1109/MIKON.2014.6899834
