Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Radar transponder only
Patent
1994-06-21
1995-08-01
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Radar transponder only
G01S 1375
Patent
active
054383358
ABSTRACT:
A responder unit for communicating with an interrogator unit which sends an RF interrogation pulse thereto is described. The responder unit includes an energy accumulator which stores the energy contained in the RF interrogation pulse to be used to power the responder unit in the absence of any RF interrogation signal. The responder unit also has a memory for storing read data and a RF threshold detector for detecting termination of the RF interrogation pulse. A RF carrier wave generator under control of the RF threshold detector is operable to activate upon detection of the termination of the RF interrogation pulse. A modulator is provided in the responder unit to modulate the RF carrier with the read data from the memory.
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Heinecke Guenter
Kremer Rudolf
Schuermann Josef H.
Donaldson Richard L.
Kesterman James C.
McCormack Brian C.
Sotomayor John B.
Texas Instruments Deutschland GmbH
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