Design Guide

Hardware Interfaces
A DIVISION OF TRIMBLE
Hardware Overview 23
Antenna Requirements
The performance of the ThingMagic Nano is affected by antenna quality. Antennas that
provide good 50 ohm match at the operating frequency band perform best. Specified
performance is achieved with antennas providing 17 dB return loss (VSWR of 1.33) or
better across the operating band. Damage to the module will not occur for any return loss
of 1 dB or greater. Damage may occur if antennas are disconnected during operation or if
the module sees an open or short circuit at its antenna port.
Antenna Detection
CAUTION!
!!
Like the Micro module, but unlike the M6e and M5e modules, the Thing-
Magic Nano does not support automatic antenna detection. When writ-
ing applications to control the ThingMagic Nano you must explicitly
specify that antenna 1 is to be used. Using the MercuryAPI, this requires
creation of a “SimpleReadPlan” object with the list of antennas set and
that object set as the active /reader/read/plan. For more information see
the MercuryAPI Programmers Guide | Level 2 API | Advanced Reading |
“ReadPlan” section.