Research on the characteristics of lossy objects in a reverberation chamber
-
摘要: 为研究混响室加载效应，首先分析了混响室内各损耗途径，得出加载损耗是混响室测试过程中唯一人为可控的损耗路径。构建了常见的5种不同测试场景，利用时域法分别对这5种测试场景条件下的混响室品质因数进行测试并进行分析。结果表明，金属天线支架造成的加载效应最小，非金属天线支架会对混响室造成明显加载，降低混响室的品质因数，且随着非金属天线支架数量的增多，这种效应会愈发明显。此外，对加载物的平均吸收截面进行了研究，将混响室内所有加载物视为一个加载吸收截面，得到金属天线支架的吸收截面最小，非金属天线支架的加载吸收截面有明显增加。Abstract: Aiming at the loaded effect of reverberation chamber, the lossy approaches in cavity are analyzed, and it is concluded that the loaded lossy is the only controllable approach in the testing process. Then five test scenarios are constructed to estimate the quality factor of reverberation chamber by using the time domain method. The result shows that the lossy effect caused by metal antenna supports is the least, while the non-metallic antenna supports could significantly load the reverberation chamber and reduce the quality factor of reverberation chamber. With the increase of the number of non-metallic supports, the effects would become more obviously. In addition, the average absorption cross section of the load is also investigated, taking all the lossy objects in the reverberation chamber as one lossy absorption cross section. It is shown that the absorption cross section of the metal antenna support is the smallest, and the loading absorption cross section of the non-metal support is significantly increased.
-
Key words:
- reverberation chamber /
- loaded effect /
- quality factor /
- absorption cross section /
- loss
-
[1] Migliaccio M, Gradoni G, Arnaut L R. Electromagnetic reverberation: the legacy of Paolo Corona[J]. IEEE Transactions on Electromagnetic Compatibility, 2016, 58(3): 643-652. doi: 10.1109/TEMC.2016.2546183 [2] Tian Zhihao, Huang Yi, Shen Yaochun, et al. Efficient and accurate measurement of absorption cross section of a lossy object in reverberation chamber using two one-antenna methods[J]. IEEE Transactions on Electromagnetic Compatibility, 2016, 58(3): 686-693. doi: 10.1109/TEMC.2016.2527363 [3] Xu Qian, Huang Yi, Xing Lei, et al. B-scan in a reverberation chamber[J]. IEEE Transactions on Antennas and Propagation, 2016, 64(5): 1740-1750. doi: 10.1109/TAP.2016.2535121 [4] 程二威, 王平平, 赵敏, 等. 边界形变混响室设计与性能评估[J]. 强激光与粒子束, 2021, 33:123002Cheng Erwei, Wang Pingping, Zhao Min, et al. Design and performance evaluation of boundary deformation reverberation chamber[J]. High Power Laser and Particle Beams, 2021, 33: 123002 [5] 姜林, 王庆国, 程二威. 机械搅拌混响室独立样本数建模及实验[J]. 强激光与粒子束, 2013, 25(11):3050-3054 doi: 10.3788/HPLPB20132511.3050Jiang Lin, Wang Qingguo, Cheng Erwei. Modelling and experimental study of the number of independent samples in reverberation chamber with mechanical stirring[J]. High Power Laser and Particle Beams, 2013, 25(11): 3050-3054 doi: 10.3788/HPLPB20132511.3050 [6] Kim J S, Mittra R. Performance evaluation of a mode-stirred reverberation chamber using the finite difference time domain (FDTD) simulation[C]//Proceedings of 2021 Asia-Pacific Symposium on Electromagnetic Compatibility. 2012: 173-176. [7] Harima K, Yamanaka Y. FDTD analysis on the effect of stirrers in a reverberation chamber[C]//Proceedings of 1999 International Symposium on Electromagnetic Compatibility. 1999: 260-263. [8] Primiani V M, Moglie F. Reverberation chamber performance varying the position of the stirrer rotation axis[J]. IEEE Transactions on Electromagnetic Compatibility, 2014, 56(2): 486-489. doi: 10.1109/TEMC.2013.2285313 [9] Bastianelli L, Primiani V M, Moglie F. Stirrer efficiency as a function of its axis orientation[J]. IEEE Transactions on Electromagnetic Compatibility, 2015, 57(6): 1732-1735. doi: 10.1109/TEMC.2015.2477465 [10] Moglie F, Bastianelli L, Primiani V M. Reliable finite-difference time-domain simulations of reverberation chambers by using equivalent volumetric losses[J]. IEEE Transactions on Electromagnetic Compatibility, 2016, 58(3): 653-660. doi: 10.1109/TEMC.2016.2548520 [11] Carlberg U, Kildal P S, Carlsson J. Numerical study of position stirring and frequency stirring in a loaded reverberation chamber[J]. IEEE Transactions on Electromagnetic Compatibility, 2009, 51(1): 12-17. doi: 10.1109/TEMC.2008.2011818 [12] Zhao Huapeng, Shen Zhongxiang. Fast wideband analysis of reverberation chambers using hybrid discrete singular convolution-method of moments and adaptive frequency sampling[J] IEEE Transactions on Magnetics, 2015, 51: 7206804. [13] IEC 61000-4-21, Electromagnetic compatibility (EMC) - Part 4-21: testing and measurement techniques—reverberation chamber test methods[S]. [14] Xu Qian, Huang Yi, Xing Lei, et al. Average absorption coefficient measurement of arbitrarily shaped electrically large objects in a reverberation chamber[J]. IEEE Transactions on Electromagnetic Compatibility, 2016, 58(6): 1776-1779. doi: 10.1109/TEMC.2016.2587679 [15] Carlberg U, Kildal P S, Wolfgang A, et al. Calculated and measured absorption cross sections of lossy objects in reverberation chamber[J]. IEEE Transactions on Electromagnetic Compatibility, 2004, 46(2): 146-154. doi: 10.1109/TEMC.2004.826878 [16] Xu Qian, Huang Yi, Xing Lei, et al. Extract the decay constant of a reverberation chamber without satisfying Nyquist criterion[J]. IEEE Microwave and Wireless Components Letters, 2016, 26(3): 153-155. doi: 10.1109/LMWC.2016.2526027 [17] Cui Y, Wei G, Wang S, et al. Fast calculation of reverberation chamber Q-factor[J]. Electronics Letters, 2012, 48(18): 1116-1117. doi: 10.1049/el.2012.2106 [18] Wang Song, Wu Zhancheng, Wei Guanghui, et al. A new method of evaluating reverberation chamber Q-factor with experimental validation[J]. Progress in Electromagnetics Research Letters, 2013, 36: 103-112. doi: 10.2528/PIERL12090710 [19] Clegg J, Marvin A C, Dawson J F, et al. Optimization of stirrer designs in a reverberation chamber[J]. IEEE Transactions on Electromagnetic Compatibility, 2005, 47(4): 824-832. doi: 10.1109/TEMC.2005.860561 -
下载:
点击查看大图
图(6)
计量
- 文章访问数: 513
- HTML全文浏览量: 233
- PDF下载量: 39
- 被引次数: 0
