Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Unique identity
Patent
1991-02-13
1991-10-01
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Unique identity
342 51, G01S 1380
Patent
active
050537741
ABSTRACT:
A transponder arrangement is described comprising an interrogation unit (10) which sends an RF interrogation pulse to at least one responder unit (12). The responder unit (12) then transmits back data stored therein in the form of a modulated RF carrier to the interrogation unit (10). In the responder unit (12) is an energy accumulator (136) which stores the energy contained in the RF interrogation pulse. The responder unit (12) further contains means (142, 148) which in dependence upon the termination of the reception of the RF interrogation pulse and the presence of a predetermined energy amount in the energy accumulator (126) initiate the excitation of an RF carrier wave generator (130, 132, 134) operating with the frequency contained in the RF interrogation pulse. Further means (158, 192) are provided which from the output signal of the RF carrier wave generator (130, 132, 134) generate a control signal which is utilized to maintain the RF carrier wave and to modulate the RF carrier to be sent back with the stored data.
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Heinecke Guenter
Kremer Rudolf
Schuermann Josef H.
Comfort James T.
Kesterson James C.
Sharp Melvin
Sotomayor John B.
Texas Instruments Deutschland GmbH
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