Adjustable length antenna system for RF transponders
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United States of America Patent
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Mar 18, 2003
Grant Date -
Jan 10, 2002
app pub date -
Jan 19, 2001
filing date -
Jun 1, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention provides an RF tag having an antenna that can be selectively tuned to achieve optimal performance. The RF tag comprises an RF transponder integrated circuit and an antenna connected to the RF transponder integrated circuit. The antenna includes components such as tuning stubs and loading bars that are physically alterable to selectively vary the performance characteristics of the antenna. The tuning stub and loading bar may each further comprising a variably selectable length having elements that may be removed by punching, cutting, etching, laser trimming or other process. The antenna may further comprise a leadframe or a flexible substrate.
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