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Research on Microwave Filter of Wireless Communication System Based on Slot Structure
Yimin Yang and Tao Liu

In this study, the microwave filter with a slot structure is taken as the research subject, and the traditional microstrip filter, common slot microstrip filter, and slot microstrip filter proposed in this study were simulated. The results showed that although the 3dB bandwidth of the traditional microstrip filter reduced, the relative bandwidth is significantly increased, and the number of transmission zeros in the stop band increased, and the position became lower, leading to the strengthened band pass performance and extended stop band. Also, the improved slot line structure had more transmission zeros with lower positions, and the insertion loss and return loss in the pass band were the least.

Keywords: microwave filter, microstrip, slot, coupling