Lit Number: 11-06-21-068
Page (26)
5.4 Noise Canceling Antennas
When antennas have to operate in an environment with homogeneous noise (not
coming from any one direction), noise canceling antennas may help to restore some
performance. These antennas have multiple loops that are equal and opposite and
any (homogeneous) signal arriving at all loops is cancelled, whereas the tag signal will
arrive at one loop and be received.
Figure 33. Noise Canceling Antenna
These antennas (and the more simple figure-of-eight antenna) are only used where
noise is a problem, as under normal conditions, their read performance is less.
A
+
B
+
C
-
AREA (A + B) = C
Summary of Contents for 2000 LF Series
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