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    • 7. 发明授权
    • Circuit arrangement for side lobe suppression in radar apparatuses
    • 用于雷达装置旁瓣抑制的电路装置
    • US4367472A
    • 1983-01-04
    • US181760
    • 1980-08-27
    • Rudolf HauptmannGerhard Foeller
    • Rudolf HauptmannGerhard Foeller
    • G01S7/28H04B1/10G01S7/02
    • G01S7/2813
    • A circuit arrangement for side lobe suppression in radar wherein the undesired signals which arrive at the radar receiver by way of the side lobes of the antenna are cancelled by using a compensation circuit formed as a loop. Additional circuit means for the formation of a weighting factor for the weighting multiplier are provided in the feedback of the loop between a correlator and a weighting amplifier.When the noise power at the output of the compensating circuit is greater than the noise power that the radar receiver supplies without the compensation circuit, the output will be switched from the compensation circuit to a direct output of the radar receiver. The comparison of the noise power in a comparator then supplies the control signal for the change-over. The change-over can also occur as a function of thermal noises when the amount of the weighting factor exceeds a predetermined value. The weighting factor is monitored by a control circuit. So as to make the response behaviour of the compensated loop independent of the noise signal power, a controlled amplifier is incorporated in the control circuit with the gain of the amplifier being inversely proportional to the square of the noise amplitude in the auxiliary channel. The controlled amplifier can be mounted in the feedback branch between the correlator and the weighting multiplier or can be inserted in front of one of the two inputs of the correlator.
    • 用于雷达旁瓣抑制的电路装置,其中通过使用形成为环路的补偿电路来消除通过天线的旁瓣到达雷达接收机的不需要的信号。 在相关器和加权放大器之间的回路的反馈中提供了用于形成加权乘数的加权因子的附加电路装置。 当补偿电路输出的噪声功率大于雷达接收机不用补偿电路的噪声功率时,输出将从补偿电路切换到雷达接收机的直接输出。 比较器中的噪声功率的比较提供用于转换的控制信号。 当加权因子的量超过预定值时,转换也可以作为热噪声的函数发生。 加权因子由控制电路监控。 为了使补偿回路的响应行为独立于噪声信号功率,控制放大器并入控制电路中,放大器的增益与辅助通道中的噪声幅度的平方成反比。 控制放大器可以安装在相关器和加权乘数之间的反馈支路中,或者可以插入到相关器的两个输入之一的前面。