Durbadal Mandal

TL;DR: In this article , a fractal antenna is proposed for wideband applications, which has a resonance frequency of 5 GHz and has been designed using an FR4 substrate with a width and a length of 40 mm and patch with width, length of 35.288 mm.

TL;DR: In this article , the authors compared the performance of square and rectangle antennas in the 1.26-1.3 GHz band with a modified rectangular shape antenna with 25 mm wide by 38 mm long dimensions and several rectangular slots.

TL;DR: The use of adaptive acceleration coefficients in GGSA provides a better balance in the intensification and the diversification of GGSA as compared with the Gravitational Search Algorithm (GSA).

TL;DR: In this paper, the authors proposed an IIR full-band digital differentiator (FBDD) design methodology by using a competitive metaheuristic optimisation technique called crow search algorithm (CSA), which attains the most accurate characteristics to the ideal FBDD as compared to the standard optimisation methods such as differential evolution (DE) and real-coded genetic algorithm (RGA).

TL;DR: In this article, a class of materials, called metamaterials, with negative refractive index and a high degree of nonlinearity was introduced, and a brief summary is given on the basic theory of optics to show how this condition arrives for metammaterials to be designed into an antenna with split-ring-resonator (SRR).