In Situ Antenna Far Field Estimation Based on Equivalent Sources

Bourey, Nicolas; Darces, Muriel; Hélier, Marc

doi:10.1109/usnc-ursi.2018.8602896

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…In order to directly measure the confinement of the wave at the interface, a semi-anechoic measurement bench operating in UHF band has been developed (Figure 6) [15]. This bench uses an electro-optic nearfield probe, EFS-105 designed by enprobe [16], mounted on motorized rails which allow the displacement of the probe along 3 axes.…”

Section: Small-scale Measurementsmentioning

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: Small-scale Measurementsmentioning

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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“…An experimental set-up has been designed in order to characterize antennas, in operating environment, in the UHF band [12]. The main element of the set-up is the probe system [13] and is shown in Fig.2.…”

Section: Experimental Set-upmentioning

confidence: 99%

Near-field to far-field transformation applied to UHF antennas over lossy ground

Bourey¹,

Darces²,

Chatelon³

et al. 2019

Int. J. Microw. Wireless Technol.

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This paper deals with a near-field to far-field transformation able to predict the radiation of UHF antennas located over a lossy ground. From in-situ near-field measurements, an equivalent set of dipole sources is obtained as a model of the characterized antenna. The paper details the main steps of the transformation and describes the specific experimental set-up designed for the application. Simple directional antennas (monopoles array) as well as more complex omnidirectional antennas (like a biconical antenna as a scaled-down model of a HF antenna) have been tested in realistic environments. This approach is very efficient for separating the contributions of the radiated waves: the sky wave and the surface wave.

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HF Radar antenna near field assessment using a UAV

Herbette

Saillant

Menelle

et al. 2019

2019 International Radar Conference (RADAR)

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This paper deals with a system aboard a UAV used to map the electric near field, in amplitude and phase, radiated by an antenna operating in the HF band (3-30 MHz). The objective is to characterize the radiation pattern of antennas that are commonly integrated in HF surface wave radar. An innovative and original approach is required because usual characterization methods do not suit well for that frequency band. The proposed device is described in the paper and associated constraints are highlighted. A trial of that system has been performed on a monopole antenna, and comparisons between measurements and simulations are in good agreement.

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In Situ Antenna Far Field Estimation Based on Equivalent Sources

Cited by 4 publications

References 7 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

Near-field to far-field transformation applied to UHF antennas over lossy ground

HF Radar antenna near field assessment using a UAV

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