Kemal GuvenliSibel YenikayaMustafa SecmenGuvenli, KemalYenikaya, SibelSecmen, Mustafa2025-10-0620231392-12152029-573110.5755/j02.eie.316282-s2.0-85182572923http://dx.doi.org/10.5755/j02.eie.31628https://gcris.yasar.edu.tr/handle/123456789/7219https://doi.org/10.5755/j02.eie.31628This study presents an original parallel connected hybrid microstrip-substrate integrated waveguide (PCHMSIW) bandstop filter. A low-pass filter implemented on a microstrip structure and a SIW-based high-pass filter are connected in parallel to each other. In this way the aim is to obtain a bandstop filter in the novel hybrid design. The parallel connected hybrid microstrip-substrate integrated waveguide (PCHM-SIW) bandstop filter is synthesised simulated and produced. The effects of connecting filters in parallel are discussed. It is seen from the results of CST Studio Suite simulation that PCHM-SIW bandstop filter has a bandwidth of 2.85 GHz and a center frequency of 4.26 GHz. The frequency change rate of the center frequency between simulation and measurement is 7.02 % where it is just 3.76 % for the deviation in bandwidth. The results of the simulation and those of the measurement are close to each other. These results converge to ideal analytical results.Englishinfo:eu-repo/semantics/openAccessSubstrate integrated waveguide, Microstrip, Parallel integration, X-band, Hybrid bandstop filter.Parallel IntegrationSubstrate Integrated WaveguideHybrid Bandstop FilterMicrostripHybrid Bandstop Filter.X-bandArticle