Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system – By monitoring
Reexamination Certificate
2009-07-28
2011-10-04
Tarcza, Thomas (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
By monitoring
C342S124000, C342S134000
Reexamination Certificate
active
08031108
ABSTRACT:
In a pulse radar ranging system, directional coupling means are configured to convey transmit pulses to be transmitted via an antenna to a target and to convey target echoes received by the antenna to a signal mixer that generates an intermediate frequency signal. To embed a reference measurement into the target measurement, the directional coupling means include a four-port circulator with an additional port arranged between a port receiving the transmit pulses and a port coupled to the antenna. A reference line is coupled to the additional port for generating reference echo pulses in response to input pulses. The circulator is configured to split a portion of the transmit pulses to the reference line and to convey there reference echo pulses to the antenna.
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Barker Matthew M
Siemens Milltronics Process Instruments Inc.
Tarcza Thomas
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