| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a microwave communication apparatus capable of performing gain control in a wide dynamic range with a comparatively simple structure. SOLUTION: An intermediate frequency signal from outside is distributed by a divider 1 to a first stage amplifier 2 and detector 5. The signal amplified by the amplifier 2 is inputted into a first gain controller 3 by which the attenuation amount with respect to a passing signal is varied by a control signal from a central process unit 6, is attenuated by the controller 3 so that the gain from an output terminal of an external device to an output end of a final stage amplifier 11 is constant, and is compensated with respect to level fluctuation due to changes in temperature by a second gain controller 4. Then, the signal is converted to a certain microwave band frequency, and is inputted into the amplifier 11 to be amplified and outputted.</p> |
