Electromagnetic Radiation From Moving Fractal Sources: A Plane-Wave Spectral Approach

Abstract

Abstract-In this work the solution to the problem of electromagnetic radiation from (pre-)fractal antennas is performed by means of PlaneWave field representation based on closed-form Fourier transforms of the self-similar current patterns. The generalization to the case of uniformly translating antennas is then accomplished through the Frame-Hopping Method by exploiting special-relativistic covariance properties of Plane-Wave spectra.

Onset Time Determination of Acoustic and Electromagnetic Emission During Rock Fracture

“…In the literature it is shown [23][24][25][26][27] that the time for the EME signal to reach the maximum amplitude, T , is related to the crack T Figure 4. EME signal related to the failure of Magnetite Specimen P2 (occurred at 2000 s since the beginning of test (compare with Figures 2(d)-(f)).…”

Consideration of Mutual Coupling in a Microstrip Patch Array Using Fractal Elements

“…Based on their interesting properties, fractals have found vast application in various disciplines of sciences. One of this application is in antenna theory, where thanks to their filling property, may be used to miniaturize antenna structures and make efficient radiating structures in GHz band [6,7].…”

Circular Fractal Monopole Antenna for Low VSWR Uwb Applications

“…Circular disk with a hole (i.e., annular monopole) is usually used at the cost of impedance bandwidth and radiation pattern. Although fractal design are well known for their multi/wideband behavior [5,6] but also been optimized for UWB [7,8] along with some other characteristics [9]. The usual requirement for return loss is below −10 dB is acceptable for academic research but a standard of −15 dB is usually used for industrial and base station antenna to make antenna highly efficient [10,11].…”