The effects of different process parameters of polymer processing on electromagnetic shielding are described.
Different conductive polymer-coated woven and nonwoven fabrics prepared by various researchers for electromagnetic shielding are taken into account. Different methods of applications of conductive polymers onto textile surface are described here with their relative merits and demerits. Conductive polymer-coated textile materials showed superior electrical property as electromagnetic shield. Recent advancements of application of conductive polymers in the field of textile electromagnetic shielding are described. Different approaches of preparing textile electromagnetic shield have been described here. Various metallic and non-metallic electro-conductive textiles have been explored here as the material for electromagnetic shielding. Modification of ordinary textile materials in the form of electro-conductive composites makes them suitable for this purpose. This article reviews the preparation, development and characteristics of conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding. This kind of radiation cannot change structure of atom they just impact on their manner that it can lead to irreparable hurts. On the other hand non-ionization radiations that consist of electromagnetic radiation such as communication waves, microwaves, electrical waves. The effects of the radiations are classified to two main categories that are known as ionization and non-ionization radiation may have ionization radiations have high energy that impact on the atoms in the cells, and lead to change their natural status, however they can be too dangerous and lethal, and they will lead to cancer and other diseases. Potential of electromagnetic radiation can radiate through transmission lines which are very close to human’s life. The present paper recognize of the possible health hazard on the humanity by exposure of Electromagnetic radiations (EMR). The case of an unpolarized field is also investigated.In recent years, due to technology advances human life are subjected to high level of Electromagnetic emission, Effects of the Electromagnetic Radiation (EMR) on the humans health is one most significant concern in the world. The distribution of the time-averaged electric and magnetic energy densities and of the energy flow (Poynting vector) in the focal plane is studied in detail, and the results are illustrated by diagrams and in a tabulated form based on data obtained by extensive calculations on an electronic computor.
In particular the symmetry properties of the field with respect to the focal plane are noted and the state of polarization of the image region is investigated. Some general consequences of the formulae are then discussed. First the case of a linearly polarized incident field is examined and expressions are derived for the electric and magnetic vectors in the image space. Some miscellaneous investigations are also mentioned.Īn investigation is made of the structure of the electromagnetic field near the focus of an aplanatic system which images a point source. Certain applications in which tight focusing is desired are briefly discussed. Impact of the helical phase structure in the pupil function engineering and subsequently on the focused structure is discussed with special reference to the authors' investigations at IIT Delhi. In the present paper, roles of the amplitude-, phase-, and polarization distribution on the tightly focused structure of the optical beams are reviewed. Tight focusing of an optical beam produces intensity distribution in the focal volume different from the well-known results based on scalar theory, and polarization distribution shows space variant characteristics. Helical phase structure arising due to phase singularity in the wave front plays an important role in shaping the focal spot. It is therefore possible to engineer the focal spot using the pupil function manipulation.
Complex amplitude and polarization distribution of an optical beam plays a dominant role in shaping the focused structure of the beam.
0 kommentar(er)
