Low Scattering Plane Wave Generator Design Using a Novel Non-Coplanar Structure for Near-Field Over-the-Air Testing

Qiao, Zhaolong; Wang, Zhengpeng; Fan, Wei; Zhang, Xue; Gao, Steven; Miao, Jungang

doi:10.1109/access.2020.3039367

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…In refs. [20,21], plane wave generator (PWG) is proposed to create plane wave by the active probe, and each probe is fed by an amplitude and phase modulation shifter. By designing weights of amplitude and phase on each probe, a plane wave with acceptable deviation at a given distance from the PWG could be achieved.…”

Section: Introductionmentioning

confidence: 99%

A novel metasurface lens antenna design for over‐the‐air testing in millimetre wave radio resource management measurement

Zhang

Wang

Xue

et al. 2023

IET Microwaves Antenna & Prop

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In millimetre wave (mmWave) frequency band, radio resource management (RRM) performance is characterised in plane wave conditions using radiated over‐the‐air test method, which is a challenging combination of protocol and radio frequency performance measurement. This article presents a novel design of multiple lens‐based compact antenna test ranges (CATRs) to simulate multiple angles of arrival from different base‐stations in RRM measurement. Only four lens‐based CATRs are proposed to create plane wave conditions at the device under test with six different angles of arrival and capable of accurately constructing the wireless propagation condition and minimising the diffraction and scattering between adjacent CATRs. The lens‐based CATR is the key element in the RRM measurement system, which is composed of a metasurface lens for phase alignment and a 2 × 2 feed array antenna for the emission of electromagnetic signals. The function and capability of the proposed lens‐based CATR is validated through simulation and measurement, that the worst‐case amplitude variation in the quiet zone region is lower than ±0.8 dB at 26 GHz, and phase variation is lower than ±7.5° in the designed quiet zone, which could be used in the fifth‐generation mmWave RRM measurement.

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Section: Introductionmentioning

confidence: 99%

A novel metasurface lens antenna design for over‐the‐air testing in millimetre wave radio resource management measurement

Zhang

Wang

Xue

et al. 2023

IET Microwaves Antenna & Prop

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“…By designing the weights of amplitudes and phases on each probe, a plane wave with an acceptable deviation at a given distance from a PWG can be achieved [15]. In addition, in order to control the phase and amplitude of every probe, a large number of high-precision phase shifters is needed, and they are expensive and immature in a millimeter frequency band.…”

Section: Introductionmentioning

confidence: 99%

A Novel Metasurface Lens Design for Synthesizing Plane Waves in Millimeter-Wave Bands

et al. 2022

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With the development of communication technology has come several measurement applications requiring plane-wave conditions for wireless-device characterizations in anechoic chambers. In this paper, a metasurface lens with a 2 × 2 feeding-antenna array is proposed and characterized to synthesize a plane wave in a near field for a fifth-generation (5G) millimeter-wave radio-frequency (RF) devices test. The metasurface lens, based on Jerusalem-cross elements printed on a printed circuit board (PCB) substrate, is used for controlling the phase-shift distribution of incident spherical waves. The lens has a size of 0.4 × 0.4 m and is designed to operate at a range from 24.25 GHz to 27.5 GHz, and its feeding-antenna array is located at a focal plane of the lens, which is parallel to the metasurface lens. The lens is studied and verified through simulations and experiments, and a uniform amplitude and phase-field distribution at a reduced distance of 1.2 m generated by the metasurface lens throughout a QZ are achieved. The worst-case amplitude and phase variation of the designed metasurface lens are ±0.75 dB and ±7.5°, respectively. The results show a plane-wave condition can be achieved in 5G millimeter bands through the proposed compact and effective metasurface lens. Moreover, the proposed metasurface lens is shown to be capable of reducing the plane-wave synthesizing distance compared to the compact antenna test range (CATR) with a significantly reduced system cost, making it an attractive alternative to antenna testing in 5G millimeter-wave frequency bands.

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“…The measurement time also becomes prohibitive when the electrical size of the AUT becomes large. Different FF methods have been extensively employed in the industry, e.g., direct-far-field (DFF), compact antenna test range (CATR) and plane wave generator (PWG) [11,12]. The basic principle of DFF is that a plane wave at the antenna can be directly approximated if the measurement range is no smaller than the Fraunhofer FF distance.…”

Section: Introductionmentioning

confidence: 99%

Single-cut Far-Field Antenna Radiation Pattern Reconstruction Accuracy Analysis in Compact Anechoic Chamber Setup

Jensen¹,

Ji²,

Zhang³

et al. 2021

ACES

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In production testing, it is of importance to measure the key radiation parameters of an antenna under test (AUT), e.g., main beam peak and direction, sidelobes, and null depth and direction in a cost-effective setup with a short measurement time. As a result, practical measurement setups are often compact and equipped with only a few probes (or probe locations). However, these system limitations would introduce errors for antenna testing. This problem has become even more pronounced for 5G radios due to utilization of large-scale antenna configurations and high frequency bands. Spherical near-field measurements are nowadays an accurate and mature technique for characterizing AUTs, which however, necessitates a full spherical acquisition, leading to a long measurement time. Singlecut near-to-far-field transformation is a promising strategy since most of the key AUT parameters are available in the single-cut pattern and it requires much reduced measurement time. In this work, a simple and flexible scheme is proposed to evaluate errors introduced by limitations in practical setups for single-cut far-field (FF) antenna radiation pattern reconstruction, where the near-field data can be easily generated and modified according to the limitations introduced in practical multiprobe anechoic chamber setups, e.g., measurement distance, truncation range, and sampling interval. The reconstructed FF pattern is obtained using a commercial near-field to far-field transformation tool, SNIFT. The proposed scheme is numerically validated via comparing the reference FF pattern of a 4 × 8 uniform planar array composed of ideal Hertzian dipoles and reconstructed FF pattern. With the proposed scheme, the impact of practical system limitations on single-cut reconstruction accuracy can be easily analyzed.Index Terms ─ Antenna pattern measurement, nearfield far-field transformation, near field measurement, over-the-air testing, and single-cut antenna pattern.

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Low Scattering Plane Wave Generator Design Using a Novel Non-Coplanar Structure for Near-Field Over-the-Air Testing

Cited by 9 publications

References 29 publications

A novel metasurface lens antenna design for over‐the‐air testing in millimetre wave radio resource management measurement

A novel metasurface lens antenna design for over‐the‐air testing in millimetre wave radio resource management measurement

A Novel Metasurface Lens Design for Synthesizing Plane Waves in Millimeter-Wave Bands

Single-cut Far-Field Antenna Radiation Pattern Reconstruction Accuracy Analysis in Compact Anechoic Chamber Setup

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