| 摘要 |
<p>PURPOSE:To reduce a cross sectional area of a radar at a small offset angle by adopting a curved face for an array antenna so as to attain wide angle beam scanning. CONSTITUTION:In the radar system in which an array antenna 1 is offset by a prescribed angle theta with respect to an objective direction for the purpose of reducing a cross sectional area of the radar, a curves face is adopted for the array antenna 1. An exciting receiver 5 generates a transmission signal, the signal is sent from elements 3 arranged along a structural base 2 of the array antenna 1 and reflected on an object, the reflected wave is received by the array antenna 1 with a beam directivity based on phase information given by a beam controller 4 and a signal processing unit 6 provides an output of an object signal via the exciting receiver 5. Then wide angle beam scanning of + or -60 deg. or over is attained by adopting the curved face for the array antenna 1. Moreover, the radar cross sectional area when viewed from an object resident in a device axis direction at a small offset angle is reduced to a desired area in comparison with the case with a plane antenna.</p> |
