<%@ Language=JavaScript %> RFID Field Trials

RFID Trials

Technology

IDmicro 10ml LRC Active tag
  • Up to 70 feet read/write range
  • 256 bytes memory
  • 10 year battery option
  • All-weather enclosure

IDmicro 4120 Reader
  • Handles hundreds of tags in read zone
  • One antenna pair
  • Three 75 channel frequency hopping bands to avoid interference
  • Unlicensed certification under FCC Part 15 when used with IDmicro 8.5 db gain and > 3' cables ( <36dbm EIRP)




March 16, 2005
Location: parking lot of University Central Receiving
Moderate, steady rain so antennas and tags were wet.
Surface of antenna doesn't shed water so numerous standing droplets
Setup: Int 250ms Power 1023, 2 tags (7 15)
antenna about 5' high on car windows 24'' sep, polarization line parallel to ground
reader plugged into Vector 1500w power inverter
white lines are 10' apart, tags are vertical
each tag had two 2x1x3/8 ceramic magnets scotch taped to the back.

45' tags no higher than 7' +/- 20' to left/right

45' tags no lower than 2'

20' to the left but cutoff moving to the right

55' tags no higher than 7'

+/- 8' to left/right

55' tags no lower than 5'

+/- 8' to left/right




March 15, 2005
Location: parking lot of University Central Receiving Setup: Int 250ms Power 1023, 2 tags (7 15)
antenna about 5' high on car windows 18'' sep, polarization line parallel to ground
reader plugged into Vector 750w power inverter
white lines are 10' apart, tags are vertical
each tag had two 2x1x3/8 ceramic magnets scotch taped to the back.

25' tags 7' off ground, both read +/- 14' to left/right of center at 3' high to 7' high
45' tags no higher than 5' +/- 4' to left/right
The reader cut off so we left to order a higher power converter.  
The Read zone narrowed in area as the distance became greater.



March 9, 2005
Location: loading dock behind CIT building, asphalt parking lot Setup: Int 250ms Power 1023, 2 tags (7 15)
TX/RX on ground, 6' separation
tags held with arms extended about 5' high
reader plugged into wall socket
50'   neither  
40'   15 often, 7 sporadic  
30'   both  
  Setup: Same as above but hold TX over head 7'
50'   both  
60'   both  
70'   15 only