| 摘要 |
PROBLEM TO BE SOLVED: To provide a microwave branching filter device that the device configuration is simplified by reducing the number of components, the device is miniaturized and loss is equalized. SOLUTION: Branching filter devices 421 to 424 are serially connected in each channel consisting of a transmission system provided with a transmission filter and a receiving system provided with a receiving filter through an antenna feeder 41 to an antenna 40, and each branching filter device branches a transmission wave and a receiving wave into two parts through a circulator. Also, the circulators of respective branching filter devices are serially connected to each other, the rotational direction of the circulators is made different from the antenna, and a short plate 47 is provided at the open end of the last end.
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