SIW based Leaky wave antenna with Semi C-shaped slots and its Modeling, Design and parametric considerations for different materials of Dielectric

Although waveguide structures are having advantages of carrying high power capacity with high quality factor, but also had disadvantages as they were bulky, this lead to SIW which is promising technology which features both high power capacity and compact in size. leaky wave Antenna is Travelling Wave Antenna which can be made easily on this Substrate Integrated Waveguide (SIW) structure. In this paper, Modeling of SIW based Leaky Wave Antenna (LWA) with Semi C-Shaped Slots has been designed and analyzed to investigate the effects of different dielectric materials on its operating parameters of electric field, transmission gain, return losses and polar far field. Silicon(Si), Printed Circuit Board (PCB), polymethyl methacrylate (PMMA), Mica and fused silica (quartz) are used as different dielectric materials to evaluate the results in frequency domain for 9.5 GHz. Design steps for modeling LWA were orderly pursued also optimized with various equations followed by finite element method based modeling. The result obtained after simulation had showed maximum electric field is observed for PMMA and return loss is -47 dB at frequency of 9.5 GHz directivity gain of antenna 1.2dB and half power beamwidth is 27°.