نتایج جستجو برای: cylindrical antenna
تعداد نتایج: 69834 فیلتر نتایج به سال:
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This paper introduces a flexible antenna, printed on a low-cost Polyethylene Terephtalate (PET) substrate for UHF applications. The RF characteristics of the PET substrate are examined using a microstrip resonator to characterize the substrate’s relative permittivity and the loss tangent at UHF band. The PET substrate is used to print an antenna designed to work in the 868 ISMBand. The printing...
In this paper a comparison between theoretical calculations and experimental measurements of helicon wave coupling by a partial-tum shielded antenna in a toroidal heliac is presented. Despite the complicated heliac geometry, the wave dispersion, field profiles, and antenna radiation resistance are described well by a cylindrical uniform plasma theory. It also presents a simple formula relating ...
This paper shows the comparative analysis of a cylindrical dielectric resonator antenna (CDRA) fed by nonresonant microstrip patch and a proximity-fed planar annular slot (PPAS) antenna. The antenna array having an antenna element for higher directive gain at the center frequency 9.04 GHz. The band-notch is detained by almost a half-wavelength split-ring parasitic element printed around the rad...
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