| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve and expand an input level into a mono-pulse radar receiver in that the maximum value thereof is used to be limited by increased a receiver signal level during the receiving period by the receiver to saturate a low noise amplifier. SOLUTION: Switches 2a, 2b, 4a and 4b are provided at input-output terminals of low noise amplifiers 3a and 3b. Paths are so arranged that one thereof lets a signal pass through the low noise amplifiers 3a and 3b and the other does not. When a signal of a level enough to saturate the low noise amplifiers 3a and 3b is inputted, the input thereof is detected and switches 2a, 2b, 4a and 4b are so operated as to change the path to bypass the low noise amplifiers 3a and 3b.</p> |
