Identification card with RF downlink capability
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United States of America Patent
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-
Jan 16, 1996
Issued Date -
N/A
app pub date -
May 31, 1994
filing date -
Dec 7, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An Integrated Circuit (IC) card is powered by an array of photovoltaic cells with an Electrically Erasable Programmable Read Only Memory (EEPROM) with associated electronic to read the EEPROM and generate a serial bit stream that modulates a Frequency Shift Keying (FSK) RF system employing a Dielectric Resonant Oscillator (DRO) and a matched dipole antenna. The IC card is totally passive and derives its energy from an external source of radiant energy upon the array of photovoltaic cells resident in the IC card. The IC card is capable of remote interrogation which enables the IC card to be used for traffic and personnel monitoring as well as credit card applications.
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