| 摘要 |
PROBLEM TO BE SOLVED: To confirm the operation of a highly reliable and accurate receiving system with a simple constitution. SOLUTION: The low noise amplifiers 251, 252... 25n amplify the signals received by the antenna elements 201, 202, 203... 20n and output these amplified signals to a power distributor/synthesizer 27 via the circulators 231, 232, 233... 23n and phase shifters 241, 242, 243... 24n. Then one of outputs of those low noise amplifiers can be selectively monitored in every system via the changeover switches 261, 262, 263... 26n.
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