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    • 1. 发明申请
    • WIDEBAND TUNABLE NOTCH CANCELLATION
    • 宽带TUNABLE NOTCH CANCELLATION
    • US20140323076A1
    • 2014-10-30
    • US13871544
    • 2013-04-26
    • NORTHROP GRUMMAN SYSTEMS CORPORATION
    • Mark KintisXing Lan
    • H04B1/10
    • H04B1/1036H03H7/0123H03H2007/013
    • A system and method for wideband tunable notch cancellation that is passive and does not require feedback or feed forward circuitry. An input spectrum containing interference is split into two signals that are 180 degrees out of phase with each other. The preferred signal is filtered out of the 180 degree out of phase signal using a notch filter while the original signal is sent through a delay line. Then the two signals are summed with a power summer so that the interference signals that are 180 degrees out of phase with those in the original signal are cancelled out and the preferred signal remains. The notch filter is tunable to different preferred signals.
    • 用于宽带可调陷波消除的系统和方法,其是无源的并且不需要反馈或前馈电路。 含有干扰的输入频谱被分割成相互相差180度的两个信号。 使用陷波滤波器将优选信号从180度异相信号中滤除,同时通过延迟线发送原始信号。 然后将两个信号与电源加法相加,使得与原始信号中的信号相差180度的干扰信号被抵消,并且优选的信号保持不变。 陷波滤波器可调到不同的优选信号。
    • 5. 发明授权
    • Wideband tunable notch cancellation
    • 宽带可调陷波消除
    • US09425840B2
    • 2016-08-23
    • US13871544
    • 2013-04-26
    • Northrop Grumman Systems Corporation
    • Mark KintisXing Lan
    • H04B1/10H03H7/01
    • H04B1/1036H03H7/0123H03H2007/013
    • A system and method for wideband tunable notch cancellation that is passive and does not require feedback or feed forward circuitry. An input spectrum containing interference is split into two signals that are 180 degrees out of phase with each other. The preferred signal is filtered out of the 180 degree out of phase signal using a notch filter while the original signal is sent through a delay line. Then the two signals are summed with a power summer so that the interference signals that are 180 degrees out of phase with those in the original signal are cancelled out and the preferred signal remains. The notch filter is tunable to different preferred signals.
    • 用于宽带可调陷波消除的系统和方法,其是无源的并且不需要反馈或前馈电路。 含有干扰的输入频谱被分割成相互相差180度的两个信号。 使用陷波滤波器将优选信号从180度异相信号中滤除,同时通过延迟线发送原始信号。 然后将两个信号与电源加法相加,使得与原始信号中的信号相差180度的干扰信号被抵消,优选的信号保持不变。 陷波滤波器可调到不同的优选信号。