Arc coupled band: pass filters

A filter design of coupled band – pass filters is very often used in practise because exhibit smaller spread of filter elements \nthen filter ladder configurations. In comparison to cascade synthesis method enable this type of filters to reach smaller filter element \nsensitivity. However in area of active filter design there are problems with active filter elements (active inductances or FDNR \nelements) which require relatively high quality factors and consequently relatively high numbers of active elements (OAs) too. In \npaper are prescribed some class of coupled band – pass filters using lossy active elements with minimised number of active elements \n(OAs). The possibilities of application and using of developed active band – pass filters are discussed in further details and explained \nin some examples.