| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem that a current sensor for measuring space having high space resolution has inferior time resolution and a current sensor for measuring space having high time resolution has inferior space resolution. SOLUTION: Not only a space of a wide scope can be measured by transmission and reception at a time but also a part in the vicinity of the center of a receiver face which is a focus of a parabola face can be measured with high space resolution by reflecting a rear scattering wave from a target on the parabola face which is a revolution parabolic mirror having a recessed face and measuring it by elements spread over the whole receiver face which is a rotary elliptic face having a recessed face. Moreover, a transmitter and a receiver are independent from each other, and it is possible to provide high space resolution in a short distance and measure a long distance by sending various frequencies by the transmitter because the transmitter hardly requires directivity.</p> |
