| 摘要 |
PROBLEM TO BE SOLVED: To provide a Cassegrain antenna, which can secure stable antenna performance by minimizing the variations in the position relation between a main reflector and a sub-reflector and with which a waveguide connection part can surely make in close contact, by absorbing the dimensional error in a joining part of a radio device. SOLUTION: The main reflector and sub-reflector of the Cassegrain antenna are molded integrally as an antenna mirror surface 1, composed of a main reflector part 1a, a sub-reflector part 1b, and a stay part 1c, for example, by drawing one sheet metal. Consequently, positional precision deterioration factors for the main reflerctor and sub-reflector, such as a fitting error of a stay which is generated before can be removed to secure stable antenna performance, when the antenna is mass-produced.
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