Two terminal circuits on nonuniform microstrip lines

In this paper we show a solution for self frequency spectrum constriction of two terminal circuits based on microstrip lines. The designed method is based on using nonuniform transmission lines and is approved by agreement between theoretical calculation and electromagnetic (EM) software simulations. A maximum frequency deviation between calculated results and EM simulation corresponds to 1.7 MHz only at gigahertz ranges and allows one to create a high frequency filter design with more than 40 dB wide stopband signal amplitude suppression.