| 摘要 |
PROBLEM TO BE SOLVED: To realize reduction in size and weight of the overall instrument by reduction in size and weight of the lens part, and make easy to handle the lens part, manufacture, and assemble. SOLUTION: An electric wave from a geostationary satellite is input from side peripheral face of a semispherical lens 120 which is made dividing a sphere lens into 2 pieces. The electric wave which converges by the semispherical lens 120 is reflected in a cross-section of the semispherical lens 120 by an electric wave reflection board 110, and takes a route symmetrical of the surface to a case of a sphere lens, since the semispherical lens 120 is mounted on an electric wave reflecting plate 110. A radiator 130 positions in a convergence position of the electric wave beam formed on the side peripheral face of the semispherical lens 120, that is a focal point. By this means, the radiator 130 can receive the electric waves from the geostationary satellite, and also can reversely transmit electric waves to the geostationary satellite. Since a semispherical lens can be used, miniaturization of the lens part can be realized, and the handling. manufacturing of the instrument, and assembling is facilitated. COPYRIGHT: (C)2004,JPO
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