| 摘要 |
PURPOSE:To obtain the titled amplifier just adaptable to respective reception channels by selecting and combing suitably each unit of an input frequency branching device, a frequency converter, an amplification part, and an output mixer in respective lines, and connecting them by a receptacle between a power supply case and an input/output case. CONSTITUTION:When a station increasing unit is incorporated in the input/output part, the characteristic changes largely after increasing the station. Hence VSWR correcting coils L1, L2 are provided between respective input circuits on the input side of the input/output part unit. The coils L1, L2 are connected in series connection between respective input frequency branching device or respective frequency converter units 2, and are grounded. The sum of the length among each unit and the length of coil L2 ( l1+ l2+ l3+L2) is rotated so as to make the impedance maximum corresponding to the length from a one-side unit 2 to an increased unit 2. As a result, the frequency characteristic does not change at all. Similarly, there is no change in the frequency characteristic of the units on the other end. Accordingly, by securing the overall balance from the intervals among the l1 through the l3 and the coils L1, L2, the station increasing can be realized without degrading the electrical characteristic of the unit 2. |
