Use of quiet zone prediction in the design of compact antenna test ranges

Parini, C.G.; Philippakis, M.

doi:10.1049/ip-map:19960233

Cited by 18 publications

(7 citation statements)

References 2 publications

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“…These plots show that when the ratio of the diameter of the optimized zone to that of reflector is 0.5, the maximum ripple of magnitude along the axis x is 0.3 dB, and the maximum ripple of phase along the axis x is 3.2 • . The ripples are less than those in the definition of quiet zone: ±0.5 dB in magnitude and ±5 • in phase [17]. When the feed is in the focal point, the ripples of the magnitude and phase are 5.6 dB and 28.9 • , respectively.…”

Section: Calculation Results and Analysismentioning

confidence: 72%

Plane-Wave Synthesis for Compact Antenna Test Range by Feed Scanning

Wang¹,

Miao²,

Jiang³

et al. 2012

PIER M

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The plane-wave synthesis is brought to the CATR. The feed scans in the focal plane and antenna pattern is measured several times in different feed positions. The corrected antenna pattern is obtained by weighting the measured patterns. The weight is obtained by the least squares method for the electric fields in the aperture plane of the test antenna. The fashion, number and spacing of feed scanning are investigated. By the plane-wave synthesis in the CATR, a larger antenna can be tested, and higher test accuracy can be obtained than that of the CATR. Lower test number and less test time are needed than the conventional plane-wave synthesis. The technique proposed in this paper is numerically investigated in an offset single paraboloid CATR and verified experimentally in a Cassegrain CATR at 100 GHz.

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Section: Calculation Results and Analysismentioning

confidence: 72%

Plane-Wave Synthesis for Compact Antenna Test Range by Feed Scanning

Wang¹,

Miao²,

Jiang³

et al. 2012

PIER M

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show abstract

“…Note that the wave impedances of the antenna at shorter distances are generally significantly different from those at the far‐field value of

η_{0} = 377 Ω

due to the stronger characteristics of the electric or magnetic field depending on the source type [Micronix, ]. The PD decrease in Table is unavoidable even if we adopt the quiet zone uniformity of the compact range chamber [Parini and Philippakis, ] for exposure. It can be seen that the PD around h = 180 mm is twice the electromagnetic field (EMF) guideline limit of 1 mW/cm 2 [ICNIRP, ].…”

Section: Resultsmentioning

confidence: 99%

Proposal of 28 GHz In Vitro Exposure System Based on Field Uniformity for Three‐Dimensional Cell Culture Experiments

Lee

Chung

Jeon

et al. 2019

Bioelectromagnetics

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This paper proposes a novel in vitro exposure system operating at millimeter‐wave (mmWave) 28 GHz, one of the frequency bands under consideration for fifth generation (5G) communication. We employed the field uniformity concept along cross‐sectional observation planes at shorter distances from the radiation antenna for better efficiency and a small‐size system. A choke‐ring antenna was designed for this purpose in consideration of a wider beamwidth (BW) and a symmetric far‐field pattern across three principal planes. The permittivity of Dulbecco's modified Eagle's medium solution was measured to examine the specific absorption rate (SAR) of the skin cell layer inside a Petri dish model for a three‐dimensional (3D) cell culture in vitro experiment. The best deployment of Petri dishes, taking into account a geometrical field symmetry, was proposed. Local SAR values within the cell layer among the Petri dishes were determined with different polarization angles. It was determined that this polarization effect should be considered when the actual exposure and deployment were conducted. We finally proposed an in vitro exposure system based on the field uniformity including downward exposure from an antenna for 3D cell culture experiments. A small‐size chamber system was obtained, and the size was estimated using the planar near‐field chamber design rule. Bioelectromagnetics. 2019;40:445–457. © 2019 Bioelectromagnetics Society

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“…In order to evaluate the CR performance, especially the performance of the co-polarization field, the most direct way is to compare its spatial amplitude and phase variations in the transverse plane of the quiet zone [8], [9]. Based on the differences of the generation mechanism, the amplitude or phase variation can further classified as the taper and the ripple [10].…”

Section: Introductionmentioning

confidence: 99%

“…Different from previous papers, in which physical optics (PO) [8], [14], geometrical optics (GO) and geometrical theory of diffraction (GTD) [4], [7], [15] are generally used to for the near-field computation, in this paper, the aperture field convolution method will be adopted. It is based on a convolution algorithm and has the advantages of time-saving and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Compact Range Performance Evaluation Using Aperture Near-Field Angular Spectrums

Quan

2013

IEEE Trans. Antennas Propagat.

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For a compact range (CR), the near-field angular spectrum can be obtained by making an inverse Fourier transform of its aperture spatial near field. The characteristics of the aperture design have been carried by the aperture near-field angular spectrum. The direct wave and edge-diffracted waves from the aperture can be separated and distinguished clearly in the angular domain. Therefore, the CR performance can be evaluated and improved accordingly. In this paper, based on the aperture field convolution method and plane wave spectrum (PWS) theory, near-field angular spectrums for different apertures have been computed. The general criteria for the CR aperture design have been discussed. The selections of the whole aperture shape, the serration height, the serration base length, the serration number, and the serration shape (including isosceles and right-angled triangles) have been compared. At last, the near fields of an optimized serrated-edge aperture and an original circular aperture in different transverse planes have been computed and compared. The width and height of the apertures are all 30 wavelengths in free space. In order to suppress the sidelobes, a Chebyshev window with dB sidelobes has been adopted in the spatial-angular transform.Index Terms-Aperture antennas, compact range (CR), convolution, near fields, plane wave spectrum (PWS), spectrum analysis.

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Use of quiet zone prediction in the design of compact antenna test ranges

Cited by 18 publications

References 2 publications

Plane-Wave Synthesis for Compact Antenna Test Range by Feed Scanning

Plane-Wave Synthesis for Compact Antenna Test Range by Feed Scanning

Proposal of 28 GHz In Vitro Exposure System Based on Field Uniformity for Three‐Dimensional Cell Culture Experiments

Compact Range Performance Evaluation Using Aperture Near-Field Angular Spectrums

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