| 摘要 |
<p>PURPOSE:To improve the ability of restraining unnecessary waves by providing a pulse generating circuit to generate a sample hold pulse and a sample hold circuit to hold correlative components in a correlative loop. CONSTITUTION:A pulse generating circuit 9 to generate a sample hold pulse after detecting unnecessary waves received from an auxiliary antenna 2 and sample hold circuits 7, 8 which are operated by a sample hold pulse Tb are provided. A reset pulse Ta is also provided to reset the time constants of reducing filters 10, 11 and the circuit 9 for each beam scanning. As a result, correlative components in a correlative loop right before there is no pulse for pulse-like unnecessary waves are held to make response to the correlative loop faster. In addition, when new correlative operation is required for each beam scanning in one-dimensional and two-dimensional phased array antennas, the correlative loop is initiated to allow a new loop to be made, so that a correlative group is combined to improve the ability of restraining the unnecessary waves of a side lobe canceller.</p> |
