نتایج جستجو برای: low band
تعداد نتایج: 1311647 فیلتر نتایج به سال:
This communication presents the experimental validation of independent and wide beam scanning with a dual-band transmitarray antenna (TA) in Satcom upand down-links at Ka-band. The TA consists two subarrays: one operates down-link central frequency 19.5 GHz, while other up-link centered 29 GHz. Both subarrays share common radiating aperture to obtain compact configuration. layout is made 1 bit ...
Ultra wide band systems are used in wide variety of applications due to its resistance to severe multipath and jamming, low complexity and low cost. UWB finds extensive application in mobile handsets. Microstrip antennas are used in ultra wide band applications because of its low profile, high efficiency and economical fabrication features. In this paper, a comparative study of various antennas...
In this study, a novel method called “atmospheric pressure solution evaporation (APSE)” wasdeveloped for growing of Zinc Oxide (ZnO) nanostructures on Al2O3 surface. Zinc acetate dihydrate,Polyvinyl Pyrrolidone, and deionized water were used as precursor, capping, and solvent, respectively.The growth of ZnO nanostructures from evaporated solution was performed at three temperatures of300, 400, ...
Background: Extremely low frequency (0-300 Hz) fields from power lines, electronic equipment and medical devices, have been reported to produce various biological effects. Global system for mobile (GSM) is most largely used in everybody's life. This system utilizes a low frequency band as well as a high frequency range of electromagnetic field. This study investigated the effects of 217 Hz elec...
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