ThingMagic Astra-EX - Manual (Page 10)

Hardware Overview
M6 and Astra-EX User Guide 10
Figure 1: M6 RFID and WiFi Antenna Ports
Figure 2: Astra-EX RFID and WiFi Antenna Ports
Antenna Requirements
The performance of the M6 is affected by antenna quality. Antennas that provide good 50
ohm match at the operating frequency band perform best. Specified sensitivity
performance is achieved with antennas providing 17 dB return loss or better across the
operating band. Damage to the reader will not occur for any return loss of 1 dB or greater.
W A R N I N G !
Damage may occur if antennas are disconnected during operation or if the M6
and Astra-EX sees an open or short circuit at its antenna port.
W A R N I N G !
To comply with FCC’s RF radiation exposure requirements, the antenna(s) used
for this transmitter must be installed such that a minimum separation distance
of 25cm is maintained between the radiator (antenna) & user’s/nearby people’s
body at all times and must not be co-located or operating in conjunction with
any other antenna or transmitter.
Antenna Detection
To minimize the chance of damage due to transmitting on open ports or antenna
disconnection, the M6 and Astra-EX supports antenna detection. Detection is performed
automatically at startup and before RF operations. In order to be detectable antennas
must present a DC resistance of ~10k Ohms or less.