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1.发明公开
公开(公告)号：EP1512194A1
公开(公告)日：2005-03-09
申请号：EP03734338.1
申请日：2003-06-03
申请人： Raytheon Company
CPC分类号： G01S7/034 , G01S7/4004
摘要： A radar system having a tactical mode and a calibration mode includes a transmitter section (30) for providing high-power amplification of an RF pulsed waveform from an exciter during the tactical mode and the calibration mode. A circulator system (40) has an input port connected to an output of the transmitter section and including first, second and third switchable junctions (C1, C2, C3), and a high-power attenuator (46). The circulator system provides a transmit tactical mode signal path (42) and a transmit calibration mode signal path (44) of virtually identical electrical path lengths for a transmitter output signal, the tactical path passing through the first, second and third junctions in a first direction to an antenna I/O port, the calibration path passing through the first, second and third junctions in a second direction and through the high-power attenuator to an output port. A receiver section (50) is coupled to the output port and includes a receive tactical mode signal path (72) through a low noise amplifier (LNA), mixer, and an intermediate frequency (IF) amplifier to an IF output port for down-converting a radar signal. The receiver section further includes a receive calibration mode signal path (74) through an attentuator which bypasses the LNA and passes through the mixer and IF amplifier to the IF output port.
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2.发明授权
公开(公告)号：EP1512194B1
公开(公告)日：2006-03-01
申请号：EP03734338.1
申请日：2003-06-03
申请人： RAYTHEON COMPANY
CPC分类号： G01S7/034 , G01S7/4004
摘要： A radar system having a tactical mode and a calibration mode includes a transmitter section (30) for providing high-power amplification of an RF pulsed waveform from an exciter during the tactical mode and the calibration mode. A circulator system (40) has an input port connected to an output of the transmitter section and including first, second and third switchable junctions (C1, C2, C3), and a high-power attenuator (46). The circulator system provides a transmit tactical mode signal path (42) and a transmit calibration mode signal path (44) of virtually identical electrical path lengths for a transmitter output signal, the tactical path passing through the first, second and third junctions in a first direction to an antenna I/O port, the calibration path passing through the first, second and third junctions in a second direction and through the high-power attenuator to an output port. A receiver section (50) is coupled to the output port and includes a receive tactical mode signal path (72) through a low noise amplifier (LNA), mixer, and an intermediate frequency (IF) amplifier to an IF output port for down-converting a radar signal. The receiver section further includes a receive calibration mode signal path (74) through an attentuator which bypasses the LNA and passes through the mixer and IF amplifier to the IF output port.
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