Overview
Specifically designed for demanding item-level deployments, Impinj’s Mini-Guardrail reader antenna operates effectively at read distances of 7.5 cm or less. This antenna is
the ideal choice for access control, ticketing, document control, high-speed encoding stations, packaging lines, or any application requiring high reliability and a constrained
read zone. Because of its optimized short-range performance, the Mini-Guardrail antenna is virtually immune to the RF transmission limiting effects of items such as liquids, powders, and metallic packaging.
Features
• Strong near-field performance for reading tags at a distance of 0-7.5 cm
• Small form factor of 70 x 133 x 19 mm
• Weak far-field gain to minimize stray reads
• Broadband design to enable world-wide operation
Environmental Specifications
Parameter Typical Units Conditions/Notes
IP Rating IP41 Indoor use only
Temperature 0–40 Celsius Indoor use only
Humidity 5–95 Percent Relative, non-condensing
RoHS N/A Designed to meet RoHS, but not certified RoHS
Electrical Specifications
Parameter Typical Conditions/Notes
Frequency range (FCC) 865 to 956 MHz Broadband for use in all regions
Near Field Intensity -13 dBA/m Center of antenna 1 cm from
radome, 30 dBm input power
Far Field Gain -20 dBi
Polarzation Linear Parallel to short axis
VSWR* 1.25:1 Center of frequency range
Input Impedance 50 Ω
Input Power 30 dBm 33 dBm absolute max
ESD 2 KV Human Body Model
*Some item-level applications—where the tag is close to the reader antenna—can cause a 2:1 VSWR from the antenna to the reader. Users
should ensure that their reader can tolerate a VSWR as high as 2:1.
Mechanical Specifications
Parameter Typical Conditions/Notes
Weight 114 grams
Connector SMA female Requires accessory cable to connect to
reader’s RP-TNC connector
Randome Acrylic
Enclosure Aluminum w/ black
anodized coating
Dimensions 69.85mm x 133.35mm See drawing for detailed dimensions
x 19.05mm