Band-pass filter transformations by inserting ideal transformers

In this paper a procedure is proposed for designing band-pass filters with different characteristic impedances at the input and output ports, based on the insertion of ideal transformers with different transformation ratios t₁ and t₂. Thus designed, the network can have one additional element only, using derived relations and defined ranges of the t₁ and t₂ values. The transformation procedure is based on the use of Norton´s equivalencies and the ultimate network obtained is without transformers.