Comparative Testing of Devices in a Spherical Near Field System and Plane Wave Generator

Scattone, Francesco; Sekuljica, D.; Giacomini, A.; Saccardi, F.; Scannavini, A.; Foged, L. J.; Kaverine, Evgueni; Gross, N.; Iversen, P. O.

doi:10.23919/amtap.2019.8906292

Cited by 18 publications

(8 citation statements)

References 5 publications

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“…Considering the three cutting planes passing through the QZ center, the maximum amplitude deviation is 0.84 dB, and the maximum phase deviation is 7.1 deg. These results are in good agreement with the ones presented in [9]. Although the two array geometries are similar, in [9] a wideband antenna is used as element, while in the present work a half-wave dipole is used.…”

Section: A Plane Wave Generator: Simulation Resultssupporting

confidence: 89%

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Synthesis of Near-Field Arrays based on Electromagnetic Inner Products

Lisi¹,

Michel²,

Nepa³

2022

Preprint

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Near-field antennas have been successfully adopted in several wireless applications. To exploit the high reconfigurability of array antennas, multiple synthesis techniques for arrays operating in the near-field region have been proposed. Building upon previous works on eigenmode expansions of the radiated fields, two synthesis methods for the excitations of nearfield arrays based on the definition of an inner product on the electromagnetic fields are investigated: the "maximum norm" and "minimum error field norm" methods. The "maximum norm" method computes the array excitations that maximize either the active power flow through a target surface or the electric/magnetic energy stored in an assigned volume, depending on the adopted inner product. The performance of the maximum active power flow method is compared with the one of the simpler conjugate phase method. Furthermore, the limit solution achieved when the target surface reaches the far-field region is compared against the "maximum Beam Collection Efficiency" method. The "minimum error field norm" method allows to synthesize a given target field. As an example, the latter method is used to find the optimal excitation of a Plane Wave Generator with a spherical quiet zone. The effectiveness and performance of the discussed synthesis methods are validated through numerical simulations.

show abstract

Section: A Plane Wave Generator: Simulation Resultssupporting

confidence: 89%

“…These results are in good agreement with the ones presented in [9]. Although the two array geometries are similar, in [9] a wideband antenna is used as element, while in the present work a half-wave dipole is used.…”

Section: A Plane Wave Generator: Simulation Resultssupporting

confidence: 89%

Synthesis of Near-Field Arrays based on Electromagnetic Inner Products

Lisi¹,

Michel²,

Nepa³

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The CATR uses a conversion device to convert the spherical wave from the feed source at close range into the quasi-plane wave, obtaining an area to meet the antenna measurement requirements. [4][5][6][7][8][9][10][11][12] A reflector is commonly used as the conversion unit in the CATR system. In Reference, 9 a single reflector with a rolled edge obtains a quiet zone of 50% of the aperture, and the cross-polarization isolations of the system are greater than 25 dB.…”

Section: Introductionmentioning

confidence: 99%

Design of a compact antenna test range system based on reflectarray antenna

Liu

Yang

2022

Int J RF Mic Comp-Aid Eng

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A compact antenna test range (CATR) system based on a planner steppededged reflectarray antenna is proposed in this article. The parameters of the reflectarray antenna are determined by the design method of a single reflector system. Physical Optics (PO) method is used to calculate the unit phase of the reflectarray. The performance of the quiet zone is improved by optimizing the array shape. A 4320-element reflectarray antenna with a dual-ring structure is proposed and fabricated. The measured results show that the amplitude distribution of the designed reflectarray compact range is within ±1 dB, the phase distribution is within ±10 , and the crosspolarization isolations are greater than 24 dB in the region of 50% at 10 GHz. The performance of the quiet zone is favorable for the usage of CATR systems.

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“…Phased array antenna systems, where each of array elements is fed by a complex excitation coefficient, have found wide applications in the mmWave systems, e.g. beamforming for directional signal transmission or reception, nulling for interference suppression, beam-steering to track dominant propagation paths, and plane-wave generator (PWG) to synthesize a plane wave in the proximity of the PWG array [8]- [10]. The phased array performance demands precise control of the amplitude and phase excitation of the array elements.…”

Section: Introductionmentioning

confidence: 99%

Over-the-Air Array Calibration of mmWave Phased Array in Beam-Steering Mode Based on Measured Complex Signals

Wang

Zhang

Gao

et al. 2021

IEEE Trans. Antennas Propagat.

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Accurate knowledge of initial complex excitation coefficients for phased array elements is essential to ensure accurate array performance. In the literature, many array calibration algorithms have been proposed for this purpose, which generally require customized phase setting for individual phase shifters connected to array elements. In this paper, a new array calibration method is proposed for phased array operating in beam-steering mode only. That is, phase shifts of elements are only simultaneously set according to the beam-steering directions and therefore there is no need for dedicated individual element phase tuning. The proposed method requires minimum number of complex-signal measurements in principle, which enables fast measurement. Furthermore, it is found that the performance of the proposed method is determined by the beam steering matrix, whose condition number is mainly ruled by the beam-steering angle interval. The proposed method is numerically simulated and experimentally validated in a millimeter-wave (mmWave) phased array antenna-in-package (AiP) platform at 28 GHz. The proposed method presents good agreement with the well-known rotating element electric field vector (REV) array calibration method, with an amplitude error and phase error within ±0.5 dB and ±5 o , respectively. Furthermore, the reconstructed array pattern with the proposed method offers excellent match with the measured array pattern.

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Comparative Testing of Devices in a Spherical Near Field System and Plane Wave Generator

Cited by 18 publications

References 5 publications

Synthesis of Near-Field Arrays based on Electromagnetic Inner Products

Synthesis of Near-Field Arrays based on Electromagnetic Inner Products

Design of a compact antenna test range system based on reflectarray antenna

Over-the-Air Array Calibration of mmWave Phased Array in Beam-Steering Mode Based on Measured Complex Signals

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