Morteza Khajavi - Khuzestan Hydropower Plant Installation andMaintenance Company (Khpimc)-Ahwaz
Amir Mahmoudi - Khuzestan Hydropower Plant Installation andMaintenance Company (Khpimc)-Ahwaz

In this paper, a new design of Wide-Band microstrip single band bandpass filter using step impedance resonators (SIR) and parallel stubs is presented. A step impedance resonator with ۲ parallel studs and an air gap between them in the middle of the structure is selected as the base resonator, then even and odd mode capacitors are calculated for the air distance and by adding a step impedance resonator to the base resonator and optimizing the filter dimensions Come. To examine the design simulation results of the designed LC equivalent circuit in more detail, we draw it. Simplicity of design and compact dimensions are the advantages of this single-band bandpass filter. The simulation results for the proposed filter include performance in the frequency band of ۱۰.۰۲ GHz and insertion losses of - ۰.۱۰۸ dB, return losses of -۲۳.۲۷۹ dB and bandwidth of ۱.۳۳ GHz, respectively.

step impedance resonators (SIR), insertion Loss, return Loss, LC model.