HF Radar antenna near field assessment using a UAV

Herbette, Quentin; Saillant, Stéphane; Menelle, Michel; Urbani, Bruno; Bourey, Nicolas; Darces, Muriel; Hélier, Marc

doi:10.1109/radar41533.2019.171336

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…So, in order to characterize the field radiated by the structure in HF band, a near electric field measuring system embedded aboard a UAV has been developed. This original system allows to measure the near electric field in amplitude and phase [5]. A short preview of some results presented in this paper was previously released at the EuCAP 2021 conference in Düsseldorf [6].…”

Section: Introductionmentioning

confidence: 99%

Using a 3d Metamaterial to Enhance the Surface Wave Propagation for High Frequency Over-the-Horizon Radars: From Simulation to Outdoor Measurements

Herbette¹,

Bourey²,

Menelle³

et al. 2021

PIER C

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This article is about the characterization of a 3D metamaterial structure arranged to reinforce the surface wave radiation of antennas relevant to High Frequency (HF) surface wave radars. The use of a corrugated surface with a negative equivalent permittivity placed in the vicinity of the antenna increases the surface wave component of the radiated field. In order to confirm the anticipated performance of that metamaterial antenna, near-field measurements have been realized. Also, an original near far-field transformation technique, taking the surface wave into account, is applied to derive the radiation pattern of the antenna. Measurements were first achieved at reduced scale in UHF band and at full scale in HF band. At 1.1 GHz, they were operated on a small scale mock-up in a semi-anechoic chamber. An electric field acquisition setup installed in an Unmanned Aerial Vehicle (UAV) is used to characterize this antenna under outdoor conditions. This measuring system was especially designed for this application. The obtained results are discussed and enable us to validate the expected behavior of the antenna.

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Section: Introductionmentioning

confidence: 99%

Using a 3d Metamaterial to Enhance the Surface Wave Propagation for High Frequency Over-the-Horizon Radars: From Simulation to Outdoor Measurements

Herbette¹,

Bourey²,

Menelle³

et al. 2021

PIER C

Self Cite

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“…In this figure, we also see the measuring system embedded aboard the UAV which is used to characterize the system outdoors. This original system allows to measure the near electric field in amplitude and phase [3].…”

Section: Introductionmentioning

confidence: 99%

Using a 3D metamaterial to enhance surface wave propagation in HF band

Herbette

Bourey

Menelle

et al. 2021

2021 15th European Conference on Antennas and Propagation (EuCAP)

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This paper deals with the characterization of a 3D metamaterial structure to enhance the surface wave radiation of transmission antennas used with HF surface wave radars. The innovation is to use a corrugated surface with a negative effective permittivity to launch surface waves. In order to verify the predicted behaviour of this metamaterial antenna, near-field measurements were carried out at scale 1:100 in UHF band and scale 1:1 in HF band. Measurements at 1 GHz were performed on a small scale mock-up in a semi-anechoic chamber. The HF characterization was carried out outdoors thanks to an on-board measuring system on a Unmanned Aerial Vehicle (UAV) specially developed for this testing. The results are presented and allow to confirm the expected radiation of the system.

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A Full Calibration Approach on a Drone-Borne Platform for HF Antenna Measurements in Smart Grid Energy Facilities

Pastorcici,

Constantin,

Heiman

et al. 2024

Electronics

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Emerging data processing techniques brought back into attention the HF range communication as an interesting alternative to third-party solutions for IoT applications, such as data transmission in distributed energy production facilities. The physical size of HF antennas, often comparable to the surrounding objects, require in situ radiation measurements resulting in site-customized antenna design and positioning, and consequently in a higher reliability of such HF grid communications. Drone-borne measuring systems are already known as a flexible solution, but are mostly restricted to higher frequency ranges where full-wave, wide-band probes are feasible. In this work, we propose to use an electrically small, folded dipole as a probe for drone-borne measurements on HF antennas. We also propose a calibration approach for the effects related to the near-field zone, and to the drone body proximity; corrections on these two effects are the key methodological steps. We show that despite a realized gain figure in the order of −20 dBi, such a probe can provide stable results for near-field measurements, even at input power levels as low as 1 mW. Compared to other similar approaches, our configuration provides a wider frequency band of operation, higher stability in terms of pattern diagram, and a lower cost.

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HF Radar antenna near field assessment using a UAV

Cited by 4 publications

References 6 publications

Using a 3d Metamaterial to Enhance the Surface Wave Propagation for High Frequency Over-the-Horizon Radars: From Simulation to Outdoor Measurements

Using a 3d Metamaterial to Enhance the Surface Wave Propagation for High Frequency Over-the-Horizon Radars: From Simulation to Outdoor Measurements

Using a 3D metamaterial to enhance surface wave propagation in HF band

A Full Calibration Approach on a Drone-Borne Platform for HF Antenna Measurements in Smart Grid Energy Facilities

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