Sinusoidal appearance of nonuniform dumbbell shape EBGSs in microstrip transmission line

A novel technique of designing nonuniform dumbbell shape electromagnetic bandgap structure (EBGS) assisted microwave transmission line has been proposed that shows distinguished performance. The proposed design has sinusoidal appearance of binomially distributed nonuniform EBG structures. Tapered dumbbell shape EBGS assisted designs using the proposed method have been investigated and the result is compared with the performance of corresponding uniform design. Distinguished low-pass filtering (LPF) performance has been observed from the proposed design that not only shows sharp attenuation; but also significantly low ripples. The basis of the performance has been demonstrated and verified. The proposed technique, moreover, has significantly overcome the limitation of getting increased number of effective tapered EBGSs from the conventional method (i.e. binomial distribution) of tapering.