Analyzing and measuring the arrangement and movement of the stirrers on the self-correlation coefficient and the performance of the RTS60 reverberation chamber

Document Type : Original Article

Authors

1 PhD Student, Isfahan University of Technology, Isfahan, Iran

2 Professor, Isfahan University of Technology, Isfahan, Iran

3 Associate Professor, Khajeh Nasiruddin Toosi University of Technology, Tehran, Iran

Abstract

The reverberation chamber has wide applications in antenna, microwave, electromagnetic compatibility, measurement of material properties, etc. The reverberation chamber works based on the stirre of excited modes in a closed conductive chamber by a number of stirrers. In this paper, the influence of the arrangement of the stirrers in creating the number of independent modes that lead to the uniformity of the field in the reverberation chamber is investigated. In this paper, in order to estimate the appropriate analysis, the electric field intensity has been measured for three modes of stirrers (50 steps, 100 steps and 380 steps) in the RTS60 resonance chamber. The number of independent modes in 25 frequency points in the range of 250 to 900 MHz for three modes, as well as the values of the autocorrelation coefficient, which indicates the degree of independence of the excited modes in the chamber, are presented.

Keywords


Smiley face

 

[1]    M Mighani, G Dadashzadeh, “Broadband RCS reduction using a novel double layer chessboard AMC surface,” IET Electronics Letters, Vol.52, Issue14, July 2016, pp.1253-1255.
DOI: 10.1049/el.2016.1214
[2]    M Mighani, G Dadashzadeh, “Analytical Study and Experimental Verification of the Refraction Angle as a Function of Frequency Due to Surface Waves Incident onto a Tensor Impedance Sheet,” IEEE Transactions on Antennas and Propagation, Vol.67, Issue: 7, July 2019, pp. 4642-4649.
DOI: 10.1109/TAP.2019.2905779
[3]    S. Yu, L. Li, G. Shi, C. Zhu, X. Zhou, and Y. Shi, “Design, fabrication, and measurement of reflective metasurface for orbital angular momentum vortex wave in radio frequency domain,” Applied Physics Letters, vol.108, p.121903,2016.
DOI: 10.1063/1.4944789
[4]    L. Liu, X. Zhang, M. Kenney, X. Su, N. Xu, C. Ouyang, and S. Zhang, “Broadband metasurfaces with simultaneous control of phase and amplitude,” Advanced materials, vol.26, pp.5031-5036,2014.
DOI: 10.1002/adma.201401484
 
 
[5]    C.P. Feiffer, and A. Grbic, “Bianisotropic metasurfaces for optimal polarization control: Analysis and synthesis,” Physical Review Applied, vol. 2, p.044011,2014.
DOI: 10.1103/PhysRevApplied.2.044011
[6]    E. F. Knott, J. F. Shaeffer, and M. T. Tuley, “Radar cross section,” SciTech Publishing, Inc. 2004.
[7]    F. Costa, A. Monorchio, and G. Manara, “Analysis and design of ultra thin electromagnetic absorbers comprising resistively loaded high impedance surfaces,” IEEE Transaction on Antennas and Propagation, vol.58, pp.1551-1558, 2010.
DOI: 10.1109/TAP.2010.2044329
[8]    Y. Li, J. Zhang, S. Qu, J. Wang, H. Chen, Z. Xu, and A. Zhang, “Wideband radar cross section reduction using two-dimensional phase gradient metasurfaces,” Applied Physics Letters, vol. 104(22), p.221110,2014.
DOI: 10.1063/1.4881935
[9]    P. Su, Y. Zhao, S. Jia, W. Shi, and H. Wang, “An ultra-wideband and polarization-independent metasurface for RCS reduction,” Scientific Reports, vol.6, pp.20387, 2016.
DOI: 10.1038/srep20387
[10]X. Liu, J. Gao, L. Xu, X. Cao, Y. Zhao, and S. Li, “A coding diffuse metasurface for RCS reduction,” IEEE Antennas and wireless propagation letters, vol.16, pp.724-727, 2017.
DOI: 10.1109/LAWP.2016.2601108
[11]M. Long, W. Jiang, and S. Gong, “Wideband RCS reduction using polarization conversion metasurface and partially reflecting surface,” IEEE Antennas and Wireless Propagation Letters, vol.16, pp.2534-2537, 2017.
DOI: 10.1109/LAWP.2017.2731862
[12]Y. L. Shu, Y. H. Zhang, G. Q. Zhu, S. Y. He, H. C. Yin, and H. Y “Wideband RCS reduction based on polarization conversion unit cell” (in Chinese), Journal of radio science, vol.34, pp.126-132, 2019.
DOI: 10.12265/j.cjors.2021029
[13]H. H. Hsiao, C. H. Chu, and D.P. Tsai, “Fundamentals and Applications of Metasurfaces, ” Small Methods, vol.1, p.1600064, 2017.
DOI: 10.1002/smtd.201600064
[14]A. malakzadeh, M. Rezayatfam, “A New Light and Broadband Metamaterial Absorber with 1.4 mm Thickness for Reducing Radar Cross Section of Objects,” Applied Electromagnetic, Vol.8, Issue 1, 2020 (In Persian).
DOR: 20.1001.1.26455153.1399.8.1.4.4
[15]A. Sharifi, J. Khalilpour, “Patch Antenna Gain Enhancement with Meta-Material Spilt Ring Resonator Radome,” Applied Electromagnetic, Vol.3, Issue 3, 2015, (In Persian).
DOR: 20.1001.1.26455153.1394.3.3.5.4
[16]F. Mohajeri, M. E. Shariat, “Analysis and Simulation of Diffraction from Metamaterials Structures by Using of Surface Integral Equations and Multi-Level Fast Multipole Method (MLFMM) and Comparison with Moment Method,” Applied Electromagnetic, Vol.2, Issue. 25, 2022, (In Persian).
DOR: 20.1001.1.26455153.1401.10.2.3.9
[17]R. Zaker, T. Paifeshordeh, “Wideband Reduction of Radar Cross Section in Compact Coupled Antenna Array by Loading an Array of Sequential Slots,” Applied Electromagnetic, Vol.1, Issue. 28, 2024, (In Persian).
DOR: 20.1001.1.26455153.1403.12.1.7.5
[18]J. Tian, S. Li, C. He and etc., “Ultrabroadband and Multipolarized Electrically Reconfigurable Reflectarray Antennas,” IEEE Transactions on Antennas and Propagation, Vol. 73, Issue. 2, Feb. 2025, pp.723-732.
DOI: 10.1109/TAP.2024.3486014
[19]R. M. Goud, P. Paul; K Krishnamoorthy; B. Majumder and etc., “Dual-Functional Reflective-Metastructure Array for Polarization Conversion and Stealth Application,” 2024 IEEE International Symposium on Phased Array Systems and Technology, Oct. 2024, Boston, MA, USA.
DOI: 10.1109/ARRAY58370.2024.10880460
[20]H. Chen; Q. Zhen; J. Chen and etc. “X-Band and Low-RCS Flexible Wideband Antenna Array Based on Metasurface,” IEEE Antennas and Wireless Propagation Letters, Vol. 24, Issue. 3, March 2025, pp.567-571.
DOI: 10.1109/LAWP.2024.3507619
[21]D. Sievenpiper, L. Zhang, R. F. J. Broas and etc., “High-impedance electromagnetic surfaces with a forbidden frequency band,” IEEE Transactions on Microwave Theory and Techniques, Vol. 47, Issue. 11, Nov. 1999, pp.2059-2074.
DOI: 10.1109/22.798001
Volume 13, Issue 1 - Serial Number 30
Spring and Summer
September 2025
  • Receive Date: 08 April 2025
  • Revise Date: 04 June 2025
  • Accept Date: 08 July 2025
  • Publish Date: 23 July 2025