Antenna Description

0481-EX-ST-2007 Text Documents

3M Company

2007-09-21ELS_84689

ATTACHMENT B Antenna Information Width of beam in degrees of antenna at the half power point: 20o Orientation in horizontal and vertical planes: (see sketches below) Radiation pattern RFID reader antennas Road surface ground Vehicle road vehicle Reader antennas

person RFID reader ground antennas Overall height above ground to tip of antennas in meters: 2m max. Elevation of ground at antenna site above mean sea level in meters: 248m. Distance to nearest aircraft landing area in kilometers: 32 km (approx.). List any natural formations ……: none. Frequency Output Power EIRP 2.4 – 2.5 GHz 50 W 5000 W (max with 20 dB gain antenna) 430 - 460 MHz 50 W 5000 W (max with 20 dB gain antenna) 902 - 928 MHz 50 W 5000 W (max with 20 dB gain antenna) Also the actual “transmitter” is the Alien reader. It puts out rf signals in the 902 to 928 Mhz band. Additional electronics is used to convert this to a different frequency range, e.g., 402 to 428 MHz and amplify the signal to 50W. The final amplification before being radiated out of the antenna is done by the Ophir unit.


Document Created: 2007-09-21 14:31:35
Document Modified: 2007-09-21 14:31:35
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