Slot integrated folded substrate integrated waveguide bandpass filter for K band applications

Abstract

This paper proposes the study and analysis of various slot loaded folded substrate integrated waveguide band pass filter for K-band applications. Three prototypes of filer are simulated and analyzed with different resonant slot lengths for enhancing the impedance bandwidth. By incorporating a slotted structure of I shape geometry at middle of central septum, the filter achieves the maximum bandwidth of 4.33 GHz (20.8–25.13 GHz) with FBW of 18.89%. Further it achieves compact size by virtue of its folded nature which reduces its width by half.