Each mobile phone emits electromagnetic energy from the radio frequency, and amount of that absorbed by human head is measured specific absorption rate (SAR). There are standard limits, based on cell phones should be below a certain SAR. This paper designs simulates Planar Inverted F- Antenna (PIFA). The antenna distributed grounded end to intermediate point. configuration more straightforward ...

Abstract Metamaterials are a class of non-natural materials with special properties, the microstructure which does not exist in nature. By artificially designing structure such materials, they can acquire electromagnetic properties that conventional nature do have. Electromagnetically induced transparency refers to process quantum interference effect between atomic energy levels microscopic sys...

At present, a series of challenges are impeding large-scale application high temperature radar absorbing coatings (RACs), such as complex preparation raw material and complicated technology processing. In this paper, we designed experimentally demonstrated high-temperature metamaterial RAC (MRAC) with strong absorption thin thickness, which is composite coating layer metamaterial. To avoid mate...

Temporally modulated optical media are important in both abstract and applied applications, such as spacetime transformation optics, relativistic laser-plasma interactions, dynamic metamaterials. Here we investigate the behaviour of temporal boundaries, show that traditional approaches assume constant dielectric properties, with loss incorporated an imaginary part, necessarily lead to unphysica...

With the development in communication technology, severe electromagnetic wave radiation pollution has been created, resulting interference and health hazards. Thus, materials with excellent microwave absorbing properties have become an urgent need. Magnetic particles core-shell structures are widely used as absorbers due to their high magnetic loss, little eddy current effect, tunable dielectri...

We briefly review the use and the derivation of Generalized Impedance Boundary Conditions (GIBC) in the case of thin dielectric coatings and in the case of strongly absorbing media, within the context of electromagnetic scattering problem at a fixed frequency. We then numerically test the validity and accuracy of these boundary conditions in the case of high absorption. A numerical treatment of...

b) Atoms have some probability of absorbing photons from the laser beam, thereby being kicked along the direction of the beam. This processes can be modelled classically by supposing that the polarizability of the atom has an imaginary part: α = α′ + iα′′. Deduce the (time-averaged) force on an atom along the direction of propagation of a linearly polarized plane electromagnetic wave in terms o...

Although most microwave absorbing materials (MAMs) have good absorption ability above 8 GHz, they perform poorly in the low-frequency range (1–8 GHz). Metal–organic frameworks (MOFs) derived carbon-based composites been highly sought after electromagnetic and functional devices, due to their high specific area, porosity, thermal stability, low reflection loss, adjustable composition. In this re...