KAPTEOS SPECIFIC ABSORPTION RATE (SAR) ASSESSMENT

SPECIFIC ABSORPTION RATE (SAR) ASSESSMENT

The Specific Absorption Rate (SAR) assessment measures the exposition of electric fields on people. These measurements are based on standards and must be performed inside a phantom (this is a new European directive). The Kapteos eoProbe can be used in any liquids and complies with this new directive.

Example of specific projects:

 Measuring infantrymen exposure to electric fields from military communication antennas

 Application Note: Specific Absorption Rate Assessment

The exposition of people to electromagnetic fields is an historical concern. Electromagnetic fields are generated by a wide variety of systems and the emitted electrical fields have a broad frequency range (from kHz to GHz). The object of a Specific Absorption Rate Assessment is to perform measurements in accordance with standards requiring in-situ electric field in a biological medium.

 An example would be the SAR of a mobile phone

Existing technical E-field measurement solutions

There are 2 different technologies available on the market today:

• To measure the elevation of temperature inside the phantom in various places

• To measure the electric field based on antenna probes inside the phantom in various places

Proposed solution by Kapteos

The Kapteos eoProbe and eoSense electro-optic solution offers the best possible measurement system due to:

• A non-perturbative measurement (no metal parts in the eoProbe)
• A very compact design (5 mm * 35 mm)
• A very small spatial resolution (< 1 mm)
• An ultra-wide band frequency
• An operating temperature from 0 to +50°C for the probe
• The vector measurement of the E- field with excellent rejection ratio of an axis of the field to another (> 50 dB). The measured information is very comprehensive and accurate.

Targeted markets

Any manufacturer producing systems that emit electrical fields due to the transport ion of data or energy:

• Research

• Medical

• Mobile phones

• Antennas

• Communication protocols (Wifi, Bluetooth, RFID…)

• Wireless energy charging systems

• Induction furnaces

• Transport of energy

Customer advantages of using Kapteos solution

• One system that perfectly meets the standards for frequencies from 100kHz to 40GHz

• It allows the measurement of a field vector (amplitude, phase, spectrum, vector direction)

Kapteos references

• Several publications with the XLIM research institute (France)

• Tübingen Clinic (Germany).

• Infantrymen exposure to electric fields from military communication antennas (France).

Specific Absorption Rate Assessment Using Simultaneous Electric Field and Temperature Measurements

Antennas and Wireless Propagation Letters ​

XLIM, Limoges (FR)

IMEP-LAHC, Le Bourget-du-Lac (FR)

Kapteos, Sainte-Hélène-du-Lac (FR)

Boston University, Boston (US)