UHF Band-Pass Filter Based on Parallel Coupled Resonators

The proposed microstrip filter is based on parallel coupled lines whose propagation mode is quasi-TEM, this type of filter take an important part in various communication systems. In this work we will study the procedure of design and realization of an UHF band-pass filter with centre frequency of 868.5 MHz and bandwidth of 1 MHz based on Coupled parallel lines, the obtained theoretical results are in good agreement with the literature.