| 摘要 |
PURPOSE:To improve the reliability and to attan small size and light weight by inserting respectively a switch circuit between each midpoint of two lines having a characteristic being equivalent to an input/output impedance among 4 lines and ground. CONSTITUTION:The switch circuits 22, 23 are coupled respectively between the midpoints 20, 21 of the 2 lines 14, 15 having the impedance equivalent to the input/output impedance among the 4 lines 12-15 and ground. Through the constitution above, when the switch circuits 22, 23 are opened, they act like a hybrid ring, the which a reception power of one side of two input terminals 16, 17 is synthesized and the power is outputted from the other terminal 19, and in grounding the switch circuits 22, 23, the transmission power of the other terminal 19 is outputted from the terminal 17 and also the circuit constitution is very simple, then the reliability is improved and small size and light weight are attained. |
