Computer Simulations of Multiband Waveguide Filter on Modulated Metasurface

The paper presents the results of computer simulation of electromagnetic wave propagation in a segment of rectangular waveguide that has one of its wide walls made in the form of a mushroom-shaped modulated metastructure. We used electromagnetic simulation program Ansoft HFSS to obtain the field distribution, characteristics of the complex transmission coefficient S
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and VSWR associated with fundamental mode H
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. The results indicate that it is possible to create multiband waveguide rejection filters with improved characteristics and parameters using proposed structure.