Analysis and Measurement of Reflector Antennas in the MM-Wave Frequency Range

Hartmann, Jürgen; Habersack, J.; Steiner, H.-J.

doi:10.1109/inica.2007.4353928

Cited by 4 publications

(2 citation statements)

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“…However, those systems either cannot meet the high precision requirements because their usual accuracies are in order of 0.1 mm or require high levels of skilled operation, are time-consuming, and lack real-time monitoring. Recently, owing to the advantages of higher accuracy, large range, and high-speed measurement, laser trackers are being used extensively in large-scale industrial and scientific metrology, for example, in the aerospace, automotive, and nuclear physics domains [11][12][13][14]. In addition, laser trackers play an important role in ALMA, LMT, and other international well-known large antenna metrology and alignment systems [15,16].…”

Section: Measurement Systemmentioning

confidence: 99%

Large-scale compact range on-site alignment based on laser tracker measurement network

Zhou

et al. 2015

Measurement

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Section: Measurement Systemmentioning

confidence: 99%

Large-scale compact range on-site alignment based on laser tracker measurement network

Zhou

et al. 2015

Measurement

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“…Recently, owing to the advantages of higher accuracy, large range and high-speed measurement, laser trackers are being used extensively in large-scale industrial and scientific metrology, for example, in the aerospace, automotive and nuclear physics domains. [10][11][12][13]. In addition, laser trackers play an important role in ALMA, LMT (Large Millimeter Telescope) and other international well-known large antenna metrology and alignment systems [14,15].…”

Section: Metrologymentioning

confidence: 99%

Surface accuracy of a large-scale compact antenna test range considering mechanism, metrology and alignment

Zhou¹,

Li²,

Li³

et al. 2014

Meas. Sci. Technol.

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A large compact range (CR) having a width of 23 m and height of 16 m that will generate a Φ15 m quiet zone is presented. The antenna consists of 30 blocks and 76 serrated reflectors. Its mechanical accuracy is reflected in two aspects: surface precision and gap precision. In addition, the root-mean-square (RMS) surface accuracy should be less than or equal to 0.075 mm for achieving the highest operating frequency of 40 GHz, and the gaps between two segments should be controlled strictly to the tolerance of 0.4 ± 0.2 mm for avoiding gap diffraction and compensating for inter-block interference due to thermal deformation. The surface accuracy in terms of mechanical structure, metrology and alignment approach is very tight. First, a high-accuracy honeycomb sandwich panel, anisotropic back structure and spatial parallel adjustment mechanism are introduced, and the error contributions of these three mechanisms are 0.03 mm, 0.01 mm and 0.005 mm, respectively. Second, a measurement network based on laser tracker metrology was established, and the RMS error of the measurement system is controlled to 0.025 mm through the optimization of the measuring stations and weighted coordinate regression. Third, an original alignment approach that divides the entire assembly into three key phases by marked point edge-constrained surface is proposed. By performing a few iterations of onsite adjustment, the reflectors were aligned in the prescribed positions, and the gap quality was controlled effectively. Finally, the on-site alignment of the large CR is introduced. The final antenna surface RMS accuracy was up to 0.054 mm, and the gaps achieved the desired design index.

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