Electromagnetic Energy Transmission and Radiation

Abstract

This book develops a consistent macroscopic theory of electromagnetism and discusses the relation between circuit theory and filed theory. The theory is developed in successive steps from the Lorentz force, the integral form of Maxwell's equations in free space, and suitable macroscopic models of polarized and magnetized matter. It covers the electromagnetism of moving bodies and the process of electromechanical energy conversion; introduces a power-series technique for analyzing quasi-static fields and quasi-stationary systems; it emphasizes the synthesis of fields as opposed to the analysis of fields. Presented in an appendix, the reader will also find, the four-dimensional relativistic formulation of macroscopic electrodynamics.

Real-Time Vocal Tract Modelling

“…The output from the two-processor model is shown in Figure 6(b). From Figure 6(c) formants can be observed at 270, 1090, and 2030 Hz which is in agreement with those of natural speech for this utterance [17]. Figure 7(a) shows the tract profile adopted for the fricative sound /s/ which is generated by using random noise as an excitation source.…”

“…The above relations are comparable to those defining an electrical lossless transmission line [17,18]:…”

Measurement of the complex dielectric constant down to helium temperatures. II. Quasioptical technique from 0.03 to 1 THz

“…The propagation constant in medium 2, ␥ϭ␣ϩi␤ deserves some attention, since the attenuation vector ␣ and the phase vector ␤ are generally not parallel. 7 The z component of ␥ ជ is given by ␥ z ϭ␣ϩi␤ cos , where ␣ϭ͉␣͉, ␤ϭ͉␤͉, and ␣-␤ϭ␣␤ cos . After some elementary manipulations, it is found 8 that ␣ϭϪ/c Im ͱ⑀ r Ϫsin 2 and ␤ cos ϭ/c Re ͱ⑀ r Ϫsin 2 , so that we can write…”

Numerical analysis of normal mode helical dipole antennas

“…Losses due to the finite conductivity of the wire can easily be accounted for. At high frequencies the resistance of each segment is due to the skin effect, as discussed by Hayt [26] and by Ad1er, Chu, and Fano [27]. The resistance per segment can be calculated using the formulas given in the popular ITT handbook [281.…”