| 摘要 |
PURPOSE:To improve the reliability without increasing the number of low noise amplifiers by connecting a standby switch respectively to an input section and an output section in addition to an active and a standby system switch and constituting each redundancy system as 1:2. CONSTITUTION:An active low noise amplifier LNA-1 and a standby low noise amplifier LNA-2 are provided to the right rotaty circularly polarized side and the signal is switched by an input swith 2R and an output switch 4R. N active low noise amplifier LNA-3 and a standby low noise amplifier LNA-4 are provided similarly to the left rotaty polarize wave side and a signal is switched by an input switch 2L and an output switch 4L. Further, a standby switch 3 is connected between the input switches 2R and 2L and a standby switch 5 is connected between output switches 4R and 4L. The standby switches 3, 5 utilize the standby low noise amplifier LNA-2 for the right rotatory polarized wave for the standby low noise amplifier for the left rotatory circularly polarized wave and the standby low noise amplifier LNA-3 for the left rotary circularly polarized wave is utilized as the standby low noise amplifier for the right rotatory circularly polarized wave conversely through the switching connection. |
