Electric field imaging of a high impedance surface for GNSS array decoupling application

2019 International Symposium on Electromagnetic Compatibility - EMC EUROPE

Issac

et al. 2019

Self Cite

The characterization of the electromagnetic field emitted by various sources (antenna, radar...) is an important issue, either for civil or defense applications. The measurement of the electromagnetic field may be performed by a local probe, but the infrared thermography imaging is an alternative way. The latter method, called EMIR [1] (ElectroMagnetic InfraRed) has been used for years in particular at ONERA where it had been developed. We have recently successfully implemented this technique in the domain of visible light, named as EMVI [2]. As in the EMIR method, a thin film (sensitive to either electric field or magnetic field) is heated by the emitted field. But here the film is coated with a polymer doped with fluorescent molecules. As the fluorescent emission depends on the temperature of the film, we get a thermofluorescent sensor. The results presented here illustrate that new method: both magnetic and electric field imaging of a High Impedance Surface (HIS) has thus been obtained.

Section: High Impedance Surface (His)mentioning

confidence: 77%

Section: High Impedance Surface (His)mentioning

confidence: 99%

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Thermo-fluorescent images of electric and magnetic near-fields of a High Impedance Surface

Ragazzo

2019 International Symposium on Electromagnetic Compatibility - EMC EUROPE

Issac

et al. 2019

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“…Compared to previous measurements [7], we are now able to visualize both magnetic and electric field frames.…”

Section: High Impedance Surface (His)mentioning

confidence: 97%

Imaging electric and magnetic near field of radiating structures by infrared thermography

2019 International Symposium on Electromagnetic Compatibility - EMC EUROPE

Issac

Romier

2019

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The characterization and visualization of the radiated electromagnetic field is a way to diagnose and check microwaves sources, in particular in the space industry. Beyond the traditional 3D scanning of the radiating element, infrared thermography is an alternative way that may give key results in a reduced time, since a few seconds are sufficient to obtain the emitted field map even for a complex multi-cells antenna. This method, called EMIR (ElectroMagnetic InfraRed) has been developed and used for years at ONERA. We have recently extended this technique to the magnetic field, which will lead to a complete characterization of the near field structure. We illustrate this feature in the particular cases of antennas for space application and for a High Impedance Surface (HIS), a metamaterial structure that could be used to reduce the coupling between antennas confined in compact structures (typically size constraints of the spatial components).

“…Figure 8 Experimental setup for the measurement of the magnetic field of the HIS Figure 9 presents the measured Si2 parameter with and without the film [15]. It can be observed that the band gap frequencies are conserved with the presence of the sensitivefilm.…”

Section: B Images O F Electric Field O F Hismentioning

confidence: 99%

Characterization of electromagnetic fields of radiating systems by thermo-fluorescence

Ragazzo

2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE

Bobo

et al. 2020

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