Week2: We identify the most important components of
the RFID reader and the physics behind them. These components consist of an
antenna coil inductance and a capacitor which can produce the frequency that we
need. The equation that allows us to
find the frequency is 
Where L is the inductance and
C is the capacitance. When a current flows around the inductance, it generates
an electromagnetic field that communicates with a tag by an antenna coil
inductance of that tag. When electromagnetic field enter the tag, it will
induce a current that flow around the antenna coil and power the integrator
circuit to get identity information, and transmitted back to the reader which
is called ‘backscattering process’ . Our
goal for this week is continuing to find out other components that can connect
with these two components in order to have a full schematic of the RFID
reader.
Where L is the inductance and
C is the capacitance. When a current flows around the inductance, it generates
an electromagnetic field that communicates with a tag by an antenna coil
inductance of that tag. When electromagnetic field enter the tag, it will
induce a current that flow around the antenna coil and power the integrator
circuit to get identity information, and transmitted back to the reader which
is called ‘backscattering process’ . Our
goal for this week is continuing to find out other components that can connect
with these two components in order to have a full schematic of the RFID
reader. 
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