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EMC and the Radiation of Electromagnetic Waves
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To protect humans and nature from electromagnetic hazards, the health
and safety legislation for the deployment of (cellular) base
stations (e.g. GSM, UMTS, IS-95, IS-136, cdma one,....)
becomes more
and more restrictive. This is driven by the goal to reduce health risks
especially for young children and for persons working/living close to
radiating antennas.
Different public authorities issued recommendations based
on guidelines formulated by the International Committee on Non Ionising
Radio Protection (ICNIRP). Today, these recommendations must be
fulfilled for
each new transmitting antenna.
The recommendations define limits to protect the public and
those working close to transmitting antennas from electromagnetic field
hazards. Therefore an assessment of the radiated electric and magnetic
field strength for different frequency ranges must be carried out
before installing a base station or transmitter.
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ProMan
can accurately predict the
radiated electric and magnetic fields
of antennas. So the tool prevents mobile network operators of
conducting field strength measurements around each antenna (as these
are very costly). ProMan uses
algorithms to combine
antenna characteristics with a mathematical description of wave
propagation phenomena (for each antenna site).
In achieving this,
ProMan takes
into account the detailed geometrical representation of
the scenario/environment. The results are visualized in a convenient
way
allowing the simple comparison to the defined radiation limits. These
national and international EMC specifications (limits) and standards
can be used to verify the radiation of the antennas
Different operators, regulation authorities,
and public institutions are using ProMan
to investigate the EMC and environmental
scenario in the whole network with (multiple) antenna sites by
comparing the superposed radiated field strength levels to the
specified exposure limits defined in different specifications. This is
very useful if new antennas are installed on locations where already
multiple antennas are mounted because the probability to obtain field
strength levels above the thresholds is higher the more antennas are
involved.
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Features of EMC Module in ProMan
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- Based on highly accurate propagation models (either
deterministic or empirical).
- Unlimited number of antennas can be considered.
For each antenna the following parameters are used for the EMC anylsis:
- Path loss prediction
- Antenna pattern incl. azimuth and downtilt
(already included in path loss prediction)
- Max. radiated power
- Nr of carriers and for each carrier
- carrier frequency / frequency band
- bandwidth
- EMC-Specifications (national or international)
- User-defined thresholds (equations) for
different frequency ranges / bands
- Predefined specifications for several
countries (e.g. Germany, Italy, Switzerland, Austria,...)
- Open interface to define new specifications
or to modify pre-defined specifications
- Wireless standards (analyzed systems)
- Range of the carrier frequencies
- Predefined standards (GSM900, GSM1800,...)
- Open interface to define new standards or to
modify pre-defined standards
- Computed and predicted results:
- Field strength (V/m) for each wireless
standard (superposition of all carriers of the same standard)
- Resulting exposure plot: Superposition of all
wireless standards present in the given scenario (points with field
strength above and below specified threshold are marked).
If you need further information related to these modules please contact us.
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