TE20 Mode Air Filled SIW based Balun Bandpass Filter

In this paper, a TE
₂₀
mode air filled substrate integrated waveguide (AFSIW) based balun bandpass filter design has been proposed by using coupled resonator cavities for X band applications. The proposed design utilizes a novel microstrip to TE
₂₀
mode AFSIW transition. The use of air filled SIW significantly reduces the insertion loss of the filter. The filter is designed at 11 GHz center frequency with 8.6% fractional bandwidth (FBW). The insertion loss for both the output ports is 3.9 dB. All the fullwave simulations are carried out in Ansoft HFSS.