Abstract
The radial line waveguide slot array antennas have two types of slot array arrangement. The rotational mode feed structure uses the concentrically arrangement slot array which is the same slot length. It is possible to reduce the computational resource because it is good in each division to calculate the shape of the radiating slots. This art makes it is possible to large scale analysis which includes the feed structure and the radial line and the radiating slots. We can design high gain antenna. And also we can design small size (if one lap is at the minimum) of the radial line antenna. In this research, based on the theoretical calculation of the hybrid feed structure composed of the circular waveguide and coaxial feed and ring slot, and patch structure and the radial line. We simulates the hybrid feed structure using the electromagnetic field analysis simulator based on the finite element method. The rotation mode feeding structure realized the concentric array radial line slot antenna for the bore sight beam.
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