发明名称 |
High pulse repetition frequency radar early warning receiver |
摘要 |
A ten db coupler receives an RF input signal and transmits an attenuated signal through a wideband/narrow band select switch to an RF amplifier. The signal is next processed through an RF amplitude detector. A comparator then receives the signal and generates a pulse in response to signals exceeding a predetermined threshold. A pulse stretcher then eliminates excessive pulses due to noise or other signal oscillations that exceeded the comparator's threshold. A circuit comprising a retriggerable monostable and an OR gate determine if the pulses received exceed a pulse repetition frequency threshold. A ripple counter than eliminates unwanted signals by resetting if a predetermined number is not reached in a specified time. A unique audio signal is then generated if the desired signal is detected. The output signal is audible even though the input signal is of a frequency above the normal hearing threshold. Also a visual signal is provided by a light emitting diode.
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申请公布号 |
US5010341(A) |
申请公布日期 |
1991.04.23 |
申请号 |
US19890417616 |
申请日期 |
1989.10.04 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY |
发明人 |
HUNTLEY, WILLIAM P.;SWANICK, DAVID J. |
分类号 |
G01S7/02 |
主分类号 |
G01S7/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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