Communications: directive radio wave systems and devices (e.g. – Radar transponder system – Radar transponder only
Patent
1993-06-04
1994-05-10
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
Radar transponder only
342 44, G01S 1380
Patent
active
053111869
ABSTRACT:
The invention relates to a transponder for a vehicle identification device in which a radio wave including vehicle information returned from transponders provided in a vehicle is received by an interrogator. The vehicle transponder receives a query radio wave and uses a detection device to generate a previously memorized coded signal train in response to a received wave. The coded signal train varies an amount of bias voltage of the detection device so that a reflection coefficient of the detection device is varied to modulate the reflection wave of the query radio wave and the modulated wave is transmitted back to the interrogator.
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Kodera Masao
Sasaki Kunihiko
Utsu Jyunshi
Nippon Soken Inc.
Sotomayor John B.
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