General information

  • Methodology will be tailored for:
  • → the new generation communication signals characteristics (eg. 4G+, 5G, Wi-Fi 802.11ac);
  • → different environments (indoor/outdoor);
  • → real life operating situations, running applications and human postures.
  • Near field measurements will be aproached using:
  • → electric/magnetic field probes (O1,O4);
  • → opto-electric probes (O2,O3,O4);
  • → near field imaging techniques (electromagnetically-induced transparency phenomena or other).
  • In this project, electro-optic probes will be used for E-field measurement only.
  • Even if some electro-optic probes for measuring the H-field were developed, due to our budget constraints, the H-component will be determined by traditional magnetic loops within the first phase of the project. This is considered fairy suitable as the human tissue does not have magnetic properties, especially at low penetration depths (at mm waves) and because this approach is being used for standardized procedure testing as well.
  • The instruments were chosen based on the most recent maket-available probes and capabilities.
  • Uncertainty analysis will be done cautiously and systematically, taking into consideration the large number of variables that are relevant for near field measurement setups.
  • Because both amplitude and phase will be retrived by electro optic probe measurements the main estimated error source is the probe positioning. Both automatic and manual positioning will be tested for.

The work plan is divided into two phases:

Start month/ End month: 1-12
Objectives: O1,O2,O3
Planned deliverables (brief description and month of delivery), milestones and risks:

1. Software applications for the implementation of high accuracy exposure measurement procedures in the case of communication standards 4G+ and IEEE 802.11ac (2nd month).
The applications will be written in Python. The procedures will have narrowband and broadband analysis capabilities for signals with quasi-stochastic behavior in amplitude, time and frequency.

2. One scientific paper written on the topic of experimental determination of power density in the close proximity of communication devices by means of traditional E/H field probes (6th month).
Software developed in the earlier stage will be used for effective near field measurements of emitters in various realistic environments.

3. Procedure for using electro-optic near field probes for different types of EMF exposure evaluation (9th month).
The traditional electric field probes will be replaced by electro-optic probes. Measurements will be performed on different devices/environments/operating scenarios with delivery of a measurement procedure.

4. One scientific paper will be prepared for reporting comparative results obtained by the two measurement techniques (11th month).
Accuracy and uncertainty, differences/similarities will be discussed with advantages/disadvantages highlighting.

5. Milestones:
M11=Experimental determination of radiated power density;
M12= Procedure for using electro-optic probes for near field exposure evaluation.

6. Scientific papers:
There will be written at least 2 papers: 1 - Clarivate Analytics Proceedings; 1 – Master Journal list (WOS).

Risks for phase 1:
Encountering delays during rental of electro-optic probes will lead to delays in obtaining deliverables 3 and 4. Possible solutions to this situation consist of application for research mobility in a laboratory that has the necessary equipment (already identified one facility).

Start month/ End month: 13-24
Objectives: O3,04
Planned deliverables (brief description and month of delivery), milestones and risks:

1. Real-time/near real-time isotropic near field measurement system (14th month).
A 3 channel opto-electric converter will be connected to a 3 input channel signal digitizer (SDR or traditional). Software application will be written to directly access E-field strength as a result of a real time/near real time simultaneous single measurement of the field strength (very small measurement volume).

2. One scientific paper prepared on the topic of design, implementation and testing of the aforementioned system (16th month).
The isotropic near field measurement system will be tested and possibly validated in an EMF controlled environment.

3. One scientific paper written on the topic of using electromagnetically-induced transparency phenomena or other near field imaging technique for exposure assessment purposes.
Research mobility will be carried out for fulfilling this deliverable to a facility in Colorado/USA or in France. Results obtained by different measurement techniques will be compared.

4. Procedure of accurate measurement of the time varying quasi-stochastic 5G signals impinging mobile terminal user body parts (20th month).
By making use of the isotropic near field measurement system a procedure will be issued to account for microsecond variations of signals that will be emitted by 5G network devices. Advanced statistics will be applied during processing for exposure profile classification.

5. Volumetric, agile in-situ exposure characterization of users’ by measurement batteries in real time / near-real time (22nd month).
The measurement campaign will be carried out to account for spatial variation of EMF in emerging networks (5G/Wi-Fi). Measurements will be performed with respect to: technology type, service type, environment peculiarities, in different operating situations (different types of sources & body parts/postures).

6. Milestones:
M21=Development of the isotropic near field measurement system; M22= Development and testing of a highly accurate procedure for 5G signals measurement.

7. Scientific papers:
There will be written at least 3 papers: 2 – Clarivate Analytics Proceedings; 1 – Master Journal List (WOS).

Risks for phase 2:
Access to research facility in USA will not be granted implying a change of subject in the article proposed as deliverable no. 3. Possible solution: development of a near field imaging technique with instrumentation available in the dosimetry and exposimetry laboratory.