Realization of Band Pass Filter (BPF) and Non-uniform EBGS

 Realization of Band Pass Filter (BPF)

Each type of filters has different type of applications in the field of microwave communication system. There is a well defined formula deduced from the Bragg’s condition for circular shaped EBGS.

However, square and triangular shaped EBGS of same etching area of the circular shaped EBGS show the same results as conventional circular EBGS shows.

All the available works on BPF are seen to use EBGSs/dumbbell shaped EBGSs in the ground plane to improve the performance of conventional LPF. Such designs need to take care both in ground plane and in conductor plane. In the present research the non-uniform distribution of EBGSs and dumbbell shaped EBGSs are considered to realize improved BPF performance without having any attention into conductor layer. Taking care of slots etched in the ground plane is only needed.

Non-uniform EBGS

From the comprehensive literature survey, it is found that that the researchers design PBGS with optimum filling factor of 0.25. Beyond this value degrades the performances of PBG assisted microstrip transmission line in terms of passband ripple height and return loss performance. The non-uniform distributions will be used to stretch the FF beyond the optimum filling factor and to improve the performances in terms of passband ripple height, better return loss showing impressive input matching including wider and distinct stopband.