RFID Antenna

Initially designed for boundary/threshold crossing applications, the ImpinjThreshold antenna has a very wide beam width to maximize zone coverage.Threshold antennas provide a consistent and continuous read zone when linearly distributed head-to-tail. At 46 x 9 x 2 cm, the Threshold antenna’s planar form factor fits readily onto fencing or other borders.
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Sales price without tax $1.00


  • Strong far-field performance
  • Wide beam width to maximize zone coverage
  • Low profile form factor of 457 x 89 x 19 mm
  • Optimized performance for operation from 902–928 MHz

Electrical Specifications

All electrical characteristics are derived, measured, and tested with the antenna embedded within a polyurethane cable protector. These specifications are not guaranteed if the antenna is used outside of an Impinj-approved cable protector. The specifications are guaranteed at 915 MHz.

Parameter Typical Units Conditions/Notes
Frequency Range 902 to 928 MHz  
 Far-field Gain  5.0  dBi  
 HPBW (x-z plane)  60º+3º  Deg  3 dB beam width
 HPBW (y-z plane)  120º+3º  Deg  3 dB beam width

Pattern Variation (x-y

 10  dBi  Between max and min
Polarization Linear   Parallel to short axis
VSWR1 2:1    
Input Impedance 50 Ω 33dBm absolute max
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