In this letter, finite-difference time-domain (FDTD) computed radiation patterns of mobile telephones are carefully compared with those measured in our laboratory. The question on the capability of the FDTD method to correctly predict the radiated electromagnetic fields of today’s structurally complex mobile telephones is addressed. Two commercially available cellular telephones equipped with t...

The coupling matrix concept for predicting the radiation patterns of elements of an antenna array is studied. Measured data, as well as some numerical data, are used in the study. It is demonstrated that for some practical antennas of interest whose radiation patterns are affected by structure scattering, the coupling matrix concept may not work very well. As expected, the stronger the structur...

This paper presents an experimental Phased Array Antenna System operating at 10 GHz. Geometry of the antenna array is cylindrical. Antenna element excitation phases are adjusted at the intermediate frequency stage. Antenna element excitation amplitudes are taken to be constant. A least squares technique is used for phase computation and radiation pattern synthesis. The obtained radiation patter...

In this work, we apply the theory of radiation and reception acoustic waves in analysis contributions silo music phenomenon. The length portion where phenomenon occurs is considered a continuous line source. source modeled as simple permits far field, interpreting polar graphics beam patterns contributions. We propose to technique design diminish adverse effects during discharge process granula...

Background: Current imaging-based discrimination between radiation necrosis versus recurrent glioblastoma contrast-enhancing lesions remains imprecise but is paramount for prognostic and therapeutic evaluation. We examined whether patients with exhibit distinct patterns of blood oxygenation-level dependent fMRI cerebrovascular reactivity (BOLD-CVR) as the first step to better distinguishing fro...

Josephson radiation is a useful signature for detecting Majorana zero modes in topological superconductors. We study the of underdamped junction within quantum resistively and capacitively shunted model. show that dynamics two-level system induce oscillatory patterns emission spectra. With Floquet method, we obtain analytical results these find they are well described by Bessel functions. perfo...