Wideband RFID tag with matching circuit for rotating load impedance
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United States of America Patent
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Issued Date -
Mar 1, 2007
app pub date -
Aug 24, 2006
filing date -
Aug 26, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An RFID tag includes a matching circuit connected between the antenna and the ASIC. The matching circuit rotates the load impedance of the ASIC to provide optimal impedance matching between the antenna and the ASIC over a wide range of operating frequencies. The matching circuit includes a capacitor, first and second microstrips, and a capacitor connected in series. Another capacitor connects ground to a node between the first capacitor and the first microstrip.
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