User's Manual

© Copyright 2003-2005 RF Code, Inc. All rights reserved. UM-C2020-R05-20030422.
No copying of this material is allowed without prior written permission. Page 8 of 28.
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USER MANUAL – Mantis™ II Reader
Antennas – Positioning
Figure 2.3 – Standard ¼-wave helical antennas shown in various positions.
Each antenna post supplies an RF signal to the two parallel radio receivers in
the Mantis™ II Reader. Antenna input impedance is 50 ohms nominal.
Both the type of antennas used and the Reader range setting determine the
effective read range. The normal Reader-range features are defined using
¼-wave helical antennas.
These antennas are appropriate for most Reader applications. Optional
antennas that offer diverse receiving properties or extend the range of the
Reader are available for the Mantis™ II Reader. Contact your Mantis™ II
Reader distributor for more information.
The Mantis™ II Reader has two receiver channels that can operate
independently or jointly to provide Tag signal diversity reception. The Reader
can operate with one antenna on either antenna post, but the benefit of
receiver diversity reception is obtained with both antennas attached.