公开(公告)号：US4100544A

公开(公告)日：1978-07-11

申请号：US818376

申请日：1977-07-25

申请人： Royal V. Keeran

发明人： Royal V. Keeran

IPC分类号： G01S3/32 ,  G01S7/28 ,  G01S13/76 ,  G01S9/22

CPC分类号： G01S13/762 ,  G01S3/32 ,  G01S7/2813

摘要： A beacon receiver or IFF system in which the gain of the receiver is time varied to enhance the discrimination between response from transponders located ahead of the interrogator as compared with the responses from transponders in the side or rear lobe regions of the interrogator antenna pattern. The system is employed with a directional antenna and signal processing apparatus giving sum .SIGMA. and difference .DELTA. channels. In accordance with this invention, the gain of the receiver in the sum .SIGMA. channel is increased from the minimum value to a maximum value beginning after the end of interrogation pulse. The difference .DELTA. channel is varied in gain from the time in the beginning after the end of the interrogator pulse but the gain is varied inversely from the maximum level at the beginning of reception to a maximum level at the end of reception.

摘要翻译： 信标接收机或IFF系统，其中接收机的增益随时间变化，以增强与位于询问器前方的应答器的响应之间的区别，与来自询问器天线图案的侧波瓣区域或后波瓣区域中的应答器的响应相比。 该系统与定向天线和信号处理装置一起使用，提供总和SIGMA和差分DELTA信道。 根据本发明，SIGMA信号中的接收机的增益从询问脉冲结束后开始的最小值增加到最大值。 差分DELTA信道在询问器脉冲结束之后的开始时间的增益中变化，但增益从接收开始时的最大电平与接收结束时的最大电平反向变化。