Arrangement interrogation unit for transponder

Details Arrangement interrogation unit for transponder Arrangement interrogation unit for transponder

1993-01-19

1995-08-22

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

342 51, 342 44, 342 50, G01S 1375

Patent

active

054444489

ABSTRACT:
An interrogation unit which has a control circuit and an RF oscillator is described. The interrogation unit further has a transmitter which receives the output of the RF oscillator and transmits at least one RF interrogation pulse of a first frequency for interrogating the responder unit, causing the responder unit to return read data in the form of a RF response. Also in the interrogation unit is a switch for disabling the output of said transmitter and enabling reception of the RF response upon termination of the RF interrogation signal. The interrogation unit still further has a receiver for receiving the RF response upon termination of the RF interrogation pulse and an interrogation unit demodulator for demodulation of the read data from said RF response.

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