Quiet Zone Verification of Plane Wave Synthesizer Using Polar Near-Field Scanner

Tankielun, Adam; Belkacem, Anes; Akinci, Mustafa; Celik, Mert; Bartko, H.; Derat, Benoît

doi:10.23919/eucap48036.2020.9135284

Cited by 6 publications

(7 citation statements)

References 3 publications

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“…We can see < 1 dB and < 10 • variation of the field in all planes of the QZ volume, with slightly larger values at the exterior planes. Table I compares the metrics for a plane QZ with single, fixed AoA from [6], [7] and for our volumetric QZ. The simulation results show that the current solution theoretically can achieve a comparable level of maximum field variation.…”

Section: A Broadside Illuminationmentioning

confidence: 99%

“…This paper presents simulation results based on the example of such a hybrid chamber which is analyzed in the context of testing 5G NR devices operating in FR1. Specific research questions that are addressed include: (i) What is the quality of the QZ in the DUT volume, and how this compares to the existing PWGs operating in free space and designed for a fixed AoA [6]- [9]; (ii) What are the critical effects of the reflections from the WG walls on the array beamforming capabilities; and (iii) What is a feasible angular coverage of the plane waves in the empty chamber, i.e. without using any additional static or mechanically moving scatterers.…”

Section: Introductionmentioning

confidence: 99%

“…So, at 3.5 GHz the cross-section can fit an array with 20×26 or 17×22 elements, assuming 0.5λ or 0.6λ interelement spacing, respectively. The latter number of elements is a practically interesting PWG configuration since a similar implementation was presented in [6], therefore it was chosen for the numerical examples presented below. The PWG array is dual-polarized to enable arbitrary plane wave polarization in the QZ.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quiet Zone Quality of a Plane Wave Generator inside an Over-Moded Waveguide Chamber Emulating a Variable Angle of Incidence

Krasov

Iupikov

Maaskant

et al. 2021

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

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We investigate the use of a hybrid over-the-air (OTA) measurement chamber to emulate far-field testing conditions. The focus has been on the generation of a plane wave arriving at an arbitrary angle-of-arrival (AoA) to the device-under-test (DUT) without mechanical steering. The chamber consists of an oversized waveguide (WG) and a planar array antenna with adaptive beamforming. A modified linear constrained minimum variance (LCMV) beamforming algorithm is used to form a quiet zone (QZ) in the DUT region by using the reflections from the WG's metal walls. The LCMV beamformer formulation has been extended to achieve a volumetric QZ with the desired amplitude and phase uniformity. Numerical studies for the QZ size corresponding to an FR1 base station demonstrate promising results with the low levels of amplitude and phase variation. The AoA coverage of this chamber meets 3GPP specification requirements for OTA conformance testing of base stations with active antenna systems.

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Section: A Broadside Illuminationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quiet Zone Quality of a Plane Wave Generator inside an Over-Moded Waveguide Chamber Emulating a Variable Angle of Incidence

Krasov

Iupikov

Maaskant

et al. 2021

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

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“…The quality of the synthesized field can be characterized by the peak-to-peak magnitude variation of the field in the TZ, and the corresponding phase variation R mag and R arg , respectively [14]. Also, the standard deviations of the field magnitude σ mag and the phase σ arg in the TZ are commonly used [9] as performance metrics of synthesized field quality. To achieve a good quality of the far-field approximation, i.e., to be as close as possible to a perfect plane wave within the TZ, R mag and R arg are usually assumed to be less than 1 dB and 10 • , respectively.…”

Section: Numerical Modeling Approach Characterization and Calibration...mentioning

confidence: 99%

“…Field scanners are often used for the characterization and calibration of measurement environments. In AC, they can be used, e.g., for the investigation of unwanted reflections [8], for the characterization of TZ quality and calibration of the individual PWG channels [9], and for the evaluation and optimization of the TZ in CATR systems [10]. In RCs, field scanners can be used to experimentally estimate the planewave spectrum under different loading conditions [11].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Calibration of the Hybrid OTA Chamber Using a Field Scanner

Krasov

Iupikov

Friden

et al. 2022

2022 16th European Conference on Antennas and Propagation (EuCAP)

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This paper investigates the characterization and calibration procedure of the hybrid over-the-air (OTA) measurement chamber. We present a prototype of the hybrid chamber and analyze its capabilities to generate a plane wave spectrum in practice. A planar field scanner is used to acquire the embedded element fields of the chamber array for test zone (TZ) synthesis in post-processing. The repeatability of the field acquisition is evaluated. It is shown that the synthesized TZ meets the 3GPP specifications for TZ field variations for plane wave generators (PWG) in the presence of acquisition imperfections.

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Sub‐6 GHz plane wave generator design for automotive antenna over‐the‐air testing

An,

Duan,

Zhang

et al. 2024

Electronics Letters

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Automotive antennas are gaining importance due to their increasingly important role for autonomous driving with the development of the Internet of Vehicles. However, over‐the‐air testing on automotive antennas is difficult owing to its large volume and complex body structure. Plane wave generators can approximate uniform plane waves in the near field of the device under test, which can greatly reduce the measurement distance and thereby decreasing the cost compared with direct far‐field solutions. This letter designs three plane wave generators for three quiet zone sizes selected according to the vehicle structure at 5.9 GHz, achieving quiet zone sizes of 1.45 m m, 2.9m m, and 3.9 m m, respectively. Within the three quiet zones, amplitude deviations of 0.82, 0.34, and 0.34 dB and phase deviations of , and are realized, respectively, according to the numerical simulations. Uncertainty analysis is further implemented to investigate the robustness of the designed PWGs proposed in this letter.

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Quiet Zone Verification of Plane Wave Synthesizer Using Polar Near-Field Scanner

Cited by 6 publications

References 3 publications

Quiet Zone Quality of a Plane Wave Generator inside an Over-Moded Waveguide Chamber Emulating a Variable Angle of Incidence

Quiet Zone Quality of a Plane Wave Generator inside an Over-Moded Waveguide Chamber Emulating a Variable Angle of Incidence

Characterization and Calibration of the Hybrid OTA Chamber Using a Field Scanner

Sub‐6 GHz plane wave generator design for automotive antenna over‐the‐air testing

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