Reducing irradiation human head by cellular phone antenna
Journal Title: Вісник НТУУ КПІ. Серія Радіотехніка, Радіоапаратобудування - Year 2014, Vol 0, Issue 59
Abstract
Introduction. The paper proposed a method of reducing irradiation human head by cellular phone antenna. A method of solving this problem, called the compensation method. In this method, an additional radiator is placed between the head and handset (main) radiator. The results. In this work were found the electromagnetic fields. Also we solved system of linier equation and calculated the currents of radiators. We found the boundary surface of the dark spot. Conclusion. We have described the characteristics of the compensation method for the creation of weak-field area in the near region of transmitting antenna. The dimensions of the weak-field area were determined, And the mutual coupling between the main and auxiliary antennas was analyzed. The results obtained showed that under realistic condition, the compensation method permits decreasing the irradiation power by a factor of 4 to 50. Methods of wideband field compensation will be separately considered.
Authors and Affiliations
V. Naidenko, N. Salamatina
Evaluation of bit errors in different types demodulation discrete signals
Introduction. The introduction describes the main characteristics of bit errors. These sources of bit errors in discrete channels. Also listed scientists who worked on the study opportunities monitoring bit error in disc...
Determination of the diagram of the linear lattice direction with a multi-stage adaptive compensator interference
Introduction. Adaptive compensation algorithms of interference in digital antenna array (DAA) are characterized by high computational complexity. As result, it makes it difficult to implement them in real time. A paralle...
Representation and forecasting of efficiency of the new protocol of an estimation of quality of realization of developed algorithms computer steganography
There is represented the protocol quality rating of realization and technologic forecasting of efficiency of well-known and developed algorithms of computer stenography. The proposed concept can be used for the monitorin...
Accuracy of trajectory estimation algorithms based on distance- measuring surveillance data using different linearization methods
Problem statement: The radar monitoring systems are used broadly for the moving object coordinates determination. Errors of the radar navigation systems are random in nature. The optimal estimation methods and algorithms...
Near-field open coaxial sensor. Measurement aperture spatial resolution ability evaluation
Microwave sensors find wider and wider application in the different domain. The sensors design became more complicated, the methods of their description became more exact.The paper presents a simplified model for describ...