As the current standardization for 5G networks nears completion, work towards understanding potential technologies 6G wireless is already underway. One of these reconfigurable intelligent surfaces. They offer unprecedented degrees freedom engineering channel, i.e., ability to modify characteristics channel whenever and however required. Nevertheless, such properties demand that response associa...

This paper presents the use of micro-electromechanical systems (MEMS) switches to realize the radiation pattern reconfiguration of microstrip antenna, which works in Ka-band. The antenna was fabricated on a silicon substrate and designed to reconfigure radiation pattern at the operation frequency of 35GHz. The simulation results show that by controlling the states of MEMS switches between the d...

Introduction: The aim of this study was to eva-luate the salivation flow rate objectively using Schirmer test and mouth dryness and other con‌sequences subjectively by distributing question‌naires to patients receiving head and neck radio‌therapy. Materials and Methods: In this descriptive study that was carried out at Imam Khomeini hospital, Tehran, Iran, the saliva flow rate of 33 patients r...

Directive optical leaky wave antennas (OLWAs) with tunable radiation pattern are promising integrated optical modulation and scanning devices. OLWAs fabricated using CMOS-compatible semiconductor planar waveguide technology have the potential of providing high directivity with electrical tunability for modulation and switching capabilities. We experimentally demonstrate directive radiation from...

The Genetic algorithm optimization method is used in this paper for the synthesis of antenna array radiation pattern in adaptive beamforming. The synthesis problem in this paper discussed is to finding the weights of the antenna array elements that are optimum to provide the radiation pattern with maximum reduction in the sidelobe level. This technique proved its effectiveness in improving the ...