Single-cut Far-Field Antenna Radiation Pattern Reconstruction Accuracy Analysis in Compact Anechoic Chamber Setup
Keywords:
Antenna pattern measurement, nearfield far-field transformation, near field measurement, over-the-air testing, single-cut antenna patternAbstract
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 multi-probe 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.
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C. Huang, R. Wang, P. Tang, R. He, B. Ai, Z. Zhong, C. Oestges, and A. F. Molisch, “Geometry cluster-based stochastic MIMO model for vehicleto-vehicle communications in street canyon scenarios,” IEEE Transactions on Wireless Communications, vol. 20, no. 2, pp. 755-770, 2021.
K. Guan, B. Peng, D. He, J. M. Eckhardt, S. Rey, B. Ai, Z. Zhong, and T. Kürner, “Channel characterization for intra-wagon communication at 60 and 300 GHz bands,” IEEE Transactions on Vehicular Technology, vol. 68, no. 6, pp. 5193- 5207, 2019.
B. Peng, K. Guan, A. Kuter, S. Rey, M. Patzold, and T. Kuerner, “Channel modeling and system concepts for future terahertz communications: Getting ready for advances beyond 5G,” IEEE Vehicular Technology Magazine, vol. 15, no. 2, pp. 136-143, 2020.
W. Fan, P. Kyosti, M. Rumney, X. Chen, and G. F. Pedersen, “Over-the-air radiated testing of millimeter-wave beam-steerable devices in a costeffective measurement setup,” IEEE Communications Magazine, vol. 56, no. 7, pp. 64-71, 2018.
X. Chen, M. Zhang, S. Zhu, and A. Zhang, “Empirical study of angular–temporal spectra in a reverberation chamber,” IEEE Transactions on Antennas and Propagation, vol. 66, no. 11, pp. 6452-6456, 2018.
W. Xue, F. Li, and X. Chen, “Effects of signal bandwidth on total isotropic sensitivity measurements in reverberation chamber,” IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. 1-8, 2021.
X. Chen, W. Fan, L. Hentilä, P. Kyösti, and G. F. Pedersen, “Throughput modeling and validations for MIMO-OTA testing with arbitrary multipath,” IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 4, pp. 637-640, 2018.
P. Kyösti, W. Fan, and J. Kyröläinen, “Assessing measurement distances for OTA testing of massive MIMO base station at 28 GHz,” in 2017 11th European Conference on Antennas and Propagation (EUCAP), pp. 3679-3683, 2017.
Y. Ji, W. Fan, G. F. Pedersen, and X. Wu, “On channel emulation methods in multiprobe anechoic chamber setups for over-the-air testing,” IEEE Transactions on Vehicular Technology, vol. 67, no. 8, pp. 6740-6751, 2018.
F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, and M. Migliozzi, “Probe position errors corrected near-field-far-field transformation with spherical scanning,” Applied Computational Electromagnetics Society Journal, vol. 31, no. 2, 2016.
Z. Qiao, Z. Wang, W. Fan, X. Zhang, S. Gao, and J. Miao, “Low scattering plane wave generator design using a novel non-coplanar structure for near-field over-the-air testing,” IEEE Access, vol. 8, pp. 211 348-211 357, 2020
Y. Zhang, Z. Wang, X. Sun, Z. Qiao, W. Fan, and J. Miao, “Design and implementation of a wideband dual-polarized plane wave generator with tapered feeding nonuniform array,” IEEE Antennas and Wireless Propagation Letters, vol. 19, no. 11, pp. 1988-1992, 2020.
X. Chen, “Measurement uncertainty of antenna efficiency in a reverberation chamber,” IEEE Transactions on Electromagnetic Compatibility, vol. 55, no. 6, pp. 1331-1334, 2013.
H. Kong, Z. Wen, Y. Jing, and M. Yau, “Midfield over-the-air test: A new OTA RF performance test method for 5G massive MIMO devices,” IEEE Transactions on Microwave Theory and Techniques, vol. 67, no. 7, pp. 2873-2883, 2019.
H. Kong, Y. Jing, Z. Wen, and L. Cao, “Mid-field OTA RF test method: new developments and performance comparison with the compact antenna test range (CATR),” in 2020 14th European Conference on Antennas and Propagation (EuCAP), pp. 1-5, 2020.
M. Sierra-Castañer, “Review of recent advances and future challenges in antenna measurement,” Applied Computational Electromagnetics Society Journal, vol. 33, no. 1, 2018.
R. Cornelius, T. Salmerón-Ruiz, F. Saccardi, L. Foged, D. Heberling, and M. Sierra-Castañer, “A comparison of different methods for fast single-cut near-to-far-field transformation [euraap corner],” IEEE Antennas and Propagation Magazine, vol. 56, no. 2, pp. 252-261, 2014.
S. Omi, T. Uno, and T. Arima, “Single-cut nearfield far-field transformation technique employing two-dimensional plane-wave expansion,” IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 8, pp. 1538-1541, 2018.
X. Li, G. Wei, L. Yang, and B. Liao, “Fast determination of single-cut far-field pattern of base station antenna at a quasi-far-field distance,” IEEE Transactions on Antennas and Propagation, vol. 68, no. 5, pp. 3989-3996, 2020.
Y. Sugimoto, H. Arai, T. Maruyama, M. Nasuno, M. Hirose, and S. Kurokawa, “Fast far-field estimation method by compact single-cut nearfield measurements for electrically long antenna array,” IEEE Transactions on Antennas and Propagation, vol. 66, no. 11, pp. 5859-5868, 2018.
F. Rodríguez Varela, B. G. Iragüen, and M. SierraCastañer, “Undersampled spherical near-field antenna measurements with error estimation,” IEEE Transactions on Antennas and Propagation, vol. 68, no. 8, pp. 6364-6371, 2020.
C. A. Balanis, Modern Antenna Handbook. John Wiley & Sons, 2011.
X. Chen, S. Zhang, and Q. Li, “A review of mutual coupling in MIMO systems,” IEEE Access, vol. 6, pp. 24 706-24 719, 2018.
J. E. Hansen, “Spherical near-field antenna measurements,” Peter Peregrinus Ltd. (IEE Electromagnetic Waves Series 26), IET, vol. 26, 1988.
F. Jensen and A. Frandsen, “On the number of modes in spherical wave expansions,” Proc. 26th AMTA, vol. 2, no. 1, pp. 489-494, 2004.
F. Jensen, “SNIFT-computer program for spherical near-field far-field technique, volume 2,” NASA STI/Recon Technical Report N, vol. 77, p. 23328, 1976.
