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This paper presents design and measurement of a linearly polarized radial line microstrip antenna array (RL-MSAA) with U-slot circular MSAs (C-MSAs). An circular microstrip antenna with U-shaped slot is used as a radiation element of the RL-MSAA. Radiation phase of the U-slot C-MSA is controlled by tuning a radius of the C-MSA and dimensions of the U-slot on the C-MSA; therefore, the desired phase...
We propose a novel method for evaluating the scattering pattern of the light that generates an optical fiber fuse during the hole formation stage of the optical fiber fuse phenomenon when the fiber fuse is occurring continuously. We found that the directivity of the scattering light is low, and the light could be identified as a dispersion light as regards the safety of laser products. It was estimated...
Microstrip antennas (MSAs) and its arrays are applied to numerous purposes because of their features of small size, low profile, lightweight, and low cost in fabrication [1], [2]. For MSA arrays fed by microstrip lines for high gain use, feeding loss due of the microstrip lines becomes a problem. On the other hand, MSA arrays fed by a radial waveguide (RL-MSAA) are developed for high gain use such...
This paper is concerned with reducing computation time of electromagnetic field by using Horner method. Recently, authors have proposed discrete ray tracing method (DRTM) to analyze electromagnetic wave of propagation characteristics along random rough surface (RRS). The DRTM enables us to save much computation time of electromagnetic field in comparison with the conventional ray tracing method (RTM)...
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