Phenomenon of microwave reflection reduction for liquid foams at initial stage of their existence

Authors

DOI:

https://doi.org/10.3103/S073527272402002X

Keywords:

liquid foam, foam structure, foaming ratio, reflection, millimeter waves, multi-frequency measurements

Abstract

Coating metal surfaces with liquid foams is a promising approach to reducing microwave reflectivity. Due to disintegration processes, liquid foams quickly change their properties over time. The objective of this study is to experimentally evaluate changes in the masking properties of liquid foam with time. The measurements were carried out in the frequency range of 38–52 GHz using original measuring equipment that implements the principle of Fourier holography in the frequency-time domain. Measurements are carried out in less than 1 second with median averaging and synthesizing time pulses with a duration of 70 ps at 3 dB of the envelope. It is shown that for the observation period from 0 to 15 minutes, the reflection coefficient in the range of millimeter waves decreases from 0.008 to 0.001, remaining at a level sufficient for masking problem solution. The novelty of the results is the study of the initial stage of the existence of liquid foam during the first 25 minutes.

References

  1. H. Mehrpour Bernety, A. B. Yakovlev, H. G. Skinner, S.-Y. Suh, A. Alù, “Decoupling and cloaking of interleaved phased antenna arrays using elliptical metasurfaces,” IEEE Trans. Antennas Propag., vol. 68, no. 6, pp. 4997–5002, 2020, doi: https://doi.org/10.1109/TAP.2019.2957286.
  2. Y. R. Padooru, P. Y. Chen, A. B. Yakovlev, A. Alu, “Graphene metasurface makes the thinnest possible cloak in the terahertz spectrum,” in 2013 7th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, 2013, pp. 388–390, doi: https://doi.org/10.1109/MetaMaterials.2013.6809062.
  3. J. Yang, H. Wang, Y. Zhang, H. Zhang, J. Gu, “Layered structural PBAT composite foams for efficient electromagnetic interference shielding,” Nano-Micro Lett., vol. 16, no. 1, p. 31, 2024, doi: https://doi.org/10.1007/s40820-023-01246-8.
  4. M. Anguelova, M. Bettenhausen, P. Gaiser, “Passive remote sensing of sea foam using physically-based models,” in 2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006, pp. 3676–3679, doi: https://doi.org/10.1109/IGARSS.2006.942.
  5. H. Potter, G. B. Smith, C. M. Snow, D. J. Dowgiallo, J. P. Bobak, M. D. Anguelova, “Whitecap lifetime stages from infrared imagery with implications for microwave radiometric measurements of whitecap fraction,” J. Geophys. Res. Ocean., vol. 120, no. 11, pp. 7521–7537, 2015, doi: https://doi.org/10.1002/2015JC011276.
  6. L. A. Filins’kyy, “Solution of the direct problem of electromagnetic waves propagation in foams,” in 2016 XXIst International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED), 2016, pp. 46–48, doi: https://doi.org/10.1109/DIPED.2016.7772208.
  7. S. Kharkovsky, J. T. Case, R. Zoughi, F. Hepburn, “Millimeter wave detection of localized anomalies in the space shuttle external fuel tank insulating foam and acreage heat tiles,” in 2005 IEEE Instrumentationand Measurement Technology Conference Proceedings, 2005, vol. 2, pp. 1527–1530, doi: https://doi.org/10.1109/IMTC.2005.1604407.
  8. S. Kharkovsky, J. T. Case, M. A. Abou-Khousa, R. Zoughi, F. L. Hepburn, “Millimeter-wave detection of localized anomalies in the space shuttle external fuel tank insulating foam,” IEEE Trans. Instrum. Meas., vol. 55, no. 4, pp. 1250–1257, 2006, doi: https://doi.org/10.1109/TIM.2006.876543.
  9. S. N. Kharkovsky, R. Zoughi, F. L. Hepburn, “High resolution millimeter wave imaging of space shuttle external fuel tank spray-on foam insulation,” Mater. Eval., vol. 65, no. 12, pp. 1220–1229, 2007.
  10. R. Zoughi, “Microwave and millimeter wave testing for the inspection of the space shuttle spray on foam insulation (SOFI) and the acreage heat tiles,” in AIP Conference Proceedings, 2006, vol. 820, pp. 439–446, doi: https://doi.org/10.1063/1.2184561.
  11. S. Shrestha, S. Kharkovsky, R. Zoughi, F. L. Hepburn, “Microwave and millimeter wave nondestructive testing of the space shuttle external tank insulating foam,” Mater. Eval., vol. 63, no. 3, pp. 339–344, 2005.
  12. S. Kharkovsky, F. Hepburn, J. Walker, R. Zoughi, “Nondestructive testing of the space shuttle external tank foam insulation using near field and focused millimeter wave techniques,” Mater. Eval., vol. 63, no. 5, pp. 516–522, 2005.
  13. S. Kabiri, “Reverberant electromagnetic fields within launch vehicle payload fairings,” Diss., Oklahoma, 2020.
  14. S. Ivashov et al., “Frequency influence in microwave subsurface holography for composite materials testing,” in 2018 17th International Conference on Ground Penetrating Radar (GPR), 2018, pp. 1–4, doi: https://doi.org/10.1109/ICGPR.2018.8441592.
  15. F. Soldovieri, I. Catapano, L. Crocco, L. N. Anishchenko, S. I. Ivashov, “A feasibility study for life signs monitoring via a continuous-wave radar,” Int. J. Antennas Propag., vol. 2012, pp. 1–5, 2012, doi: https://doi.org/10.1155/2012/420178.
  16. V. V. Alekseev, O. O. Drobakhin, Y. V. Kondratyev, D. Y. Saltykov, “Microwave introscopy using multifrequency measurements & transversal scan,” IEEE Aerosp. Electron. Syst. Mag., vol. 21, no. 2, pp. 24–26, 2006, doi: https://doi.org/10.1109/MAES.2006.1599139.
  17. M. V. Andreev, O. O. Drobakhin, D. Y. Saltykov, “Techniques of measuring reflectance in free space in the microwave range,” in 2016 9th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW), 2016, pp. 1–4, doi: https://doi.org/10.1109/MSMW.2016.7538213.
  18. M. V. Andreev, O. O. Drobakhin, “Feature of Prony’s method application for natural frequencies estimation from the frequency response,” in 2016 8th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS), 2016, pp. 18–20, doi: https://doi.org/10.1109/UWBUSIS.2016.7724143.
  19. M. V. Andreev, O. O. Drobakhin, D. Y. Saltykov, “Determination of parameters of closely spaced resonances using fractional-rational approximation of resonator frequency response,” in 2014 International Conference on Mathematical Methods in Electromagnetic Theory, 2014, pp. 127–130, doi: https://doi.org/10.1109/MMET.2014.6928710.
  20. L. Filins’kyy, O. Hurko, “Cloaking study of metal surface by liquid foam structures in the millimeter range,” in 2023 IEEE XXVIII International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED), 2023, pp. 186–190, doi: https://doi.org/10.1109/DIPED59408.2023.10269524.
  21. O. O. Drobakhin, V. V. Alekseev, M. V. Andreev, Y. V. Kondratyev, D. Y. Saltykov, “Multifrequency near-zone radar of 6-mm wave range with combination of pulse synthesis and transversal scanning,” Telecommun. Radio Eng., vol. 66, no. 10, pp. 855–861, 2007, doi: https://doi.org/10.1615/TelecomRadEng.v66.i10.10.
  22. V. V. Alekseev, O. O. Drobakhin, S. I. Pridatko, D. Y. Saltykov, “Horn radiation properties for synthesized pulse signals in 6-mm wavelength range,” Telecommun. Radio Eng., vol. 66, no. 11, pp. 973–981, 2007, doi: https://doi.org/10.1615/TelecomRadEng.v66.i11.30.
3-D surface for amplitude-frequency characteristics

Published

2024-06-24

Issue

Section

Research Articles