| 摘要 |
A direct relay equipment includes a first antenna (11), a second antenna (12), an up direction circuit (15-23) connected from the first antenna via a first circulator (13) to the second antenna via a second circulator (14), and a down direction circuit (25-33) connected from the second antenna via the second circulator to the first antenna via the first circulator. In the up direction circuit and the down direction circuit, a received signal having a frequency f1 from the first (or second) antenna is amplified by a microwave amplifier (17,27), the output of the microwave amplifier is converted to a signal having a frequency f2 (sending vrequency), the signal having a frequency f2 is amplified by the same amplifier, and the amplifier signal having a frequency f2 is sent out from the second (or first) antenna. |
