Recent Trends in Computational Electromagnetics for Defence Applications

Abstract

Innovations in material science, (nano) fabrication techniques, and availability of fast computers are rapidly changing the way we design and develop modern defence applications. When we want to reduce R&D and the related trial-and-error costs, virtual modelling and prototyping tools are valuable assets for design engineers. Some of the recent trends in computational electromagnetics are presented highlight the challenges and opportunities . Why researchers should equip themselves with the state-of-the-art tools with multiphysics and multiscale capabilities to design and develop modern defence applications are discussed.

Are you using the right tools in computational electromagnetics?

“…There is a small penalty due to storing of twice the number of unknowns at the cell interfaces as compared to standard FEM. This penalty is within acceptable limits as we gain more in terms of computational efficiency with the resulting explicit time‐stepping scheme capable of handling unstructured mesh …”

“…This penalty is within acceptable limits as we gain more in terms of computational efficiency with the resulting explicit time-stepping scheme capable of handling unstructured mesh. 5,109,110 In general, the numerical error of DGM is of the order h 2p+1 , where h and p denote the size of the spatial element (cell) and the order of the basis function inside each element, respectively. If we set p = 0 inside each cell, then this means that the basis function remains constant inside each cell and the order of numerical error will be h. At this lowest limit, the order of error for the DGM formulation will be same as that of the standard FVTD method.…”

“…This only reflects a poor judgment on the part of the practitioners due to lack of knowledge and training (knowhow) about recent developments. To certain extent, this is also due to the lack of openly available data for comparing different tools and their capabilities . Of course, there is no single method that qualifies to be called as the perfect or ideal tool to model all types of problems.…”

“…To certain extent, this is also due to the lack of openly available data for comparing different tools and their capabilities. [5][6][7] Of course, there is no single method that qualifies to be called as the perfect or ideal tool to model all types of problems. It goes along the adage that even a blade of grass becomes a handy weapon, if one knows how and when to properly use it.…”

Introductory Chapter: Modern Applications of Electrostatics and Dielectrics

“…Dielectrics are also used to develop compact and efficient antennas [8]. There is an increase in the use of dielectrics for developing advanced defence applications [9]. Dielectric material properties can carefully engineered to develop artificial materials and coatings that can efficiently absorb or dampen incident electromagnetic waves.…”