| 摘要 |
<p>PURPOSE:To more remarkably obtain a component of a target by extracting a DC component contained bin a radar signal, in a form that the influence by a high frequency component is eliminated as much as possible. CONSTITUTION:A radar signal S1 which is inputted from an input terminal 2 is differentiated by a differentiating circuit 4 and becomes a signal S2 of only a high frequency signal after its DC component is eliminated. On the other hand, the signal S1 is applied to a polarity converting circuit 6, as well, and becomes a signal S3 after its polarity is converted. Subsequently, the signal S2 and S3 are synthesized by the first synthesizing circuit 8 and becomes a radar signal S4. This signal S4 is differentiated by a differentiating circuit 10, and an output S5 of the circuit 10 and the signal S1 are synthesized by the second synthesizing circuit 12. Next, a composite output S6 from the circuit 12 becomes an output of only a high frequency component after its DC component is eliminated. Thereafter, the output S6 from the circuit 12 is outputted from an output terminal 14, sent out to an indicator circuit and brought to prescribed processing for an image display. In such a way, a large and distinct image is obtained.</p> |
