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This paper shows critical review of substrate Integrated waveguide (SIW) technology. Dielectric filled waveguide is converted into SIW with periodic arrangement of metallized holes on both sides of the it. SIW exhibit high pass response of conventional waveguide and band stop characteristics of periodic design. So filters designed using SIW exhibit less loss, less cost, less weight, high quality factor...
In this paper a new design of periodic structure has been proposed. These periodic structures are stepped impedance open circuited stubs loaded on a 50 ohm microstrip line. On the ground plane of microstrip periodic rectangular slots are made. These slots are responsible for the enhancement of insertion loss characteristics and give wider stop band characteristic. The period of the structures loaded...
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