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MiRa and S-MiRa antenna
Working area 0 … 7 cm
Working area > 7 cm
Occupational exposure
Limits head and body 10 W/kg
Limits local limbs 20 W/kg
P
in
* = 1.77 W
General exposure
Limits head and body 2 W/kg
Limits local limbs 4 W/kg
P
in
= 0.32 W
P
in
= 1.77 W
*P
in
= conducted power at antenna input
MiRa and S-Mira antennas can always be supplied with a conducted input power of 1.77 W if the working area and thus
contact with persons is further than 7 cm from the antennas. In cases where the working area is less than 7 cm, the
input power of the antenna must be reduced to 0.32 W!
11.3
Wide Range Antenna
The Wide Range Antenna family includes the WRA7070 and WRA 3070 antennas.
Technical features:
■
Models with 70° and 30° half-beam width
■
Antenna gain = 8.5 dBic (WRA7070)
= 11.3 dBic (WRA3070)
■
Optimised for far-field use
■
Suitable for industrial environment and
outdoor use (IP 67)
Typical applications are
■
Gate applications
■
Logistics
■
Industrial automation
■
Vehicle identification
■
Bulk and single tag applications
■
High front-to-back ratio
■
Circular polarisation
■
Low VSWR
■
Extremely low axial ratio
The SAR value at a distance of 20 cm in front of the antenna up to the maximum reading range is well below the limit
values. This means that the conformity for this antenna is given.
For the case that the Wide Range Antenna is also used with less than 20 cm distance in front of the antenna, a numer-
ical calculation of the specific absorption rate (SAR) in the range 0 ... 20 cm was carried out.
30 cm
30 cm
