An overview of near-field antenna measurements
TLDR
In this paper, a brief history of near-field antenna measurements with and without probe correction is outlined, beginning with ideal probe scanning on arbitrary surfaces and ending with arbitrary probes scanning on planar, cylindrical, and spherical surfaces.Abstract:
After a brief history of near-field antenna measurements with and without probe correction, the theory of near-field antenna measurements is outlined beginning with ideal probes scanning on arbitrary surfaces and ending with arbitrary probes scanning on planar, cylindrical, and spherical surfaces. Probe correction is introduced for all three measurement geometries as a slight modification to the ideal probe expressions. Sampling theorems are applied to determine the required data-point spacing, and efficient computational methods along with their computer run times are discussed. The major sources of experimental error defining the accuracy of typical planar near-field measurement facilities are reviewed, and present limitations of planar, cylindrical, and spherical near-field scanning are identified.read more
Citations
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Metamaterial Huygens' surfaces: tailoring wave fronts with reflectionless sheets.
Carl Pfeiffer,Anthony Grbic +1 more
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Millimeter-Wave Transmitarrays for Wavefront and Polarization Control
Carl Pfeiffer,Anthony Grbic +1 more
TL;DR: In this paper, the authors designed and fabricated two separate transmit arrays that operate at 77 GHz, one as a quarter-wave plate that transforms a linearly polarized incident wave into a circularly polarized transmitted wave.
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The Role of Millimeter-Wave Technologies in 5G/6G Wireless Communications
Wei Hong,Zhi Hao Jiang,Chao Yu,Debin Hou,Haiming Wang,Chong Guo,Yun Hu,Le Kuai,Yingrui Yu,Zhengbo Jiang,Zhe Chen,Jixin Chen,Zhiqiang Yu,Jianfeng Zhai,Nianzu Zhang,Ling Tian,Fan Wu,Guangqi Yang,Zhang-Cheng Hao,Jian Yi Zhou +19 more
TL;DR: In this paper, the relevant millimeter-wave enabling technologies are reviewed: they include the recent developments on the system architectures of active beamforming arrays, beamforming integrated circuits, antennas for base stations and user terminals, system measurement and calibration, and channel characterization.
Journal ArticleDOI
Planar near-field to far-field transformation using an equivalent magnetic current approach
P. Petre,T.K. Sarkar +1 more
TL;DR: In this article, an electric field integral equation (EFIE) is developed to relate the near fields to the equivalent magnetic currents, and the method of moments is used to transform the integral equation into a matrix one.
Journal ArticleDOI
Near-field to near/far-field transformation for arbitrary near-field geometry utilizing an equivalent electric current and MoM
Tapan K. Sarkar,A. Taaghol +1 more
TL;DR: In this article, a method for computing near and far-field patterns of an antenna from its near-field measurements taken over an arbitrarily shaped geometry is presented, where the measured data need not satisfy the Nyquist sampling criteria and an electric field integral equation is developed to relate the near field to the equivalent electric current.
References
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Antenna tolerance theory—A review
TL;DR: The theoretical basis of antenna tolerance theory is reviewed in this paper, where the axial loss of gain and pattern degradation as a function of the reflector surface rms error and the surface spatial correlation are discussed.
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Quasi fast Hankel transform.
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Basic theory of probe-compensated near-field measurements
TL;DR: In this article, the application of the Lorentz reciprocity theorem to the problem of determining antenna characteristics, including the far-field pattern, is presented and the data required to correct for the directional effects of the probe, the effect of probe correction on the measured data, and the attendant mathematical computations in rectangular systems are described.
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Determination of far-field antenna patterns from near-field measurements
TL;DR: In this paper, the aperture phase and amplitude distributions are sampled by a scanning field probe, and then the measured distributions are transformed to the far field by a plane wave that is created by a feed and large reflector in the immediate vicinity of the test antenna.
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Probe compensated near-field measurements on a cylinder
TL;DR: In this paper, the authors developed a method for determining the far field pattern of an antenna from probe compensated near-field measurements over the surface of a right circular cylinder enclosing the antenna.