Impinj Mini-Guardrail Antenna


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


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