User's Manual

i-PORT M350
Page 17 of 30
3.5 System Components—Antennas
IDENTEC SOLUTIONS’ antennas are distinguished by their compact design. A variety of antennas can
be used, depending on application. The antennas are differentiated by characteristics such as
polarization, apex angle, and gain. Optimal fit to the read zone is achieved by the right choice of
antenna (characteristics) and receive sensitivity. As the antennas are passive system elements, no
tuning is required, which facilitates installation and maintenance.
3.5.1 Elliptical Polarized Antennas
Because of the wide apex angle (120º), a large read zone is achieved,
which is desirable when a large quantity of tags need to be read at one
time, or when tags moving at great speeds need to be interrogated.
Since the polarization is elliptical, orientation of the tag relative to the
antenna is not important; if the tag is in front of the antenna the tag may
be polarized horizontally or vertically along the line of sight of the antenna.
Due to its small size and weight, this antenna is very easy to integrate.
Orientation Diagrams: Elliptical polarized antenna
Elevation Azimuth
For this antenna this is the maximum transmit power setting:
• Astron DH-9185: -8 dBm