Planar and Angular Modified Substrate Integrated Waveguide (SIW) Filter with Electromagnetic Bandgap(EBG) Structures
Designing of 180o linear full mode substrate integrated waveguide(FMSIW) filter and a new type of FMSIW filter bent with 90o angle have been proposed in this paper with a new type of Electromagnetic bandgap structure, etched on the PEC surface (upper layer) of the main structures to obtain the bandpass characteristics. Insertion loss is effectively low for both (180o FMSIW and 90o bent FMSIW) filters due to this distinct type of EBG structures. Outcomes of Parametric analysis of the EBG structures have also been studied and presented in graphical form. Entire experiments have been done with Neltec (NH-9320), the dielectric constant of 3.2 and thickness of 0.8 mm. Proposed filters in this paper are used for microwave Ku band applications. Both bandpass filters are compact in size, low in cost and easy to fabricate. Moreover, 90o bent filters are more convenient in use where the linear filters are restricted
