Authors N. N. Gorbatenko, D. V. Semenikhina
Month, Year 07, 2018 @en
Index UDC 621.369.9
DOI 10.23683/2311-3103-2018-7-16-24
Abstract At the moment, the urgent task is to study the nonlinear effects of artificial objects arising under irradiation with a monochromatic wave. In the literature, this effect is called the nonlinear scattering effect (NSE). The practical application of the ENR covers a wider area of radio engineering. NSE is widely used to create sensors, tracking insects, searching for people. One of the main domain of the practical application of NSE is also the expansion of the class of nonlinear diffusers, the creation of noise generators, the creation of hidden communication channels. Previously obtained results for a flat microstrip structure with nonlinear inclusions on DNG substrates of the material have confirmed the feasibility of using metamaterial (MM) to increase the level of harmonic components of the scattered field. However, a more preferred method for introducing NSE would be the use of conformal structures with nonlinear elements. This article deals with the problem of excitation of a magnetic current a filament of a perfect conducting cylinder with non-linear loads (NLs) coated with a MM. The material with negative dielectric and magnetic permeability’s at the excitation frequency was chosen as the MM. The problem is solved by the method of integral equations using the Lorentz Lemma, nonlinear boundary conditions (NBC) on the surface of the NLs, the boundary conditions on the cylinder and the conditions of radiation on infinity. Nonlinear loads are described by a polynomial current-voltage characteristic. Using the developed C ++ program, which is based on the Broyden-Fletcher-Goldfarb-Shanno algorithm (BFGS), scatterplots were calculated for various positions of non-linear loads. It was shown that the use of a coating of MM with negative values of dielectric and magnetic permeability, allows you to increase the level of the reflected 3rd harmonic field, with certain parameters of nonlinear loads, on 10 dB compared to a dielectric of FR-4 material. The proposed structure can be used in non-linear radar systems, as well as for monitoring human physical parameters, creating portable jammers.

Download PDF

Keywords Nonlinear load; nonlinear tags; nonlinear boundary conditions; metamaterial.
References 1. Arazm F. and Benson F.A. Nonlinearities in metal contacts at microwave frequencies, IEEE Trans. Electromagn. Compat., Aug. 1980, Vol. 22, No. 3, pp. 142-149.
2. Aumann H.M. and Emanetoglu N.W. A wideband harmonic radar for tracking small wood frogs, in Proc. IEEE Radar Conf., May 2014, pp. 108-111.
3. Jau P.-H. et al. Signal processing for harmonic pulse radar based on spread spectrum technology, IET Radar, Sonar Navigat., Mar. 2014, Vol. 8, No. 3, pp. 242-250.
4. Milanesio D., Saccani M., Maggiora R., Laurino D., and Porporato M. Design of an harmonic radar for the tracking of the Asian yellow-legged hornet, Ecol. Evol., Mar. 2016, Vol. 6, No. 7, pp. 1-9.
5. Tsaiet Z.M. al. A high-range-accuracy and high-sensitivity harmonic radar using pulse pseudorandom code for bee searching, IEEE Trans. Microw. Theory Techn., Jan. 2013, Vol. 61, No. 1, pp. 666-675,
6. Min K.-S. and Kim J.-W. Circularly polarized triple band patch antenna for non-linear junction detector, in Proc. IEEE Int. Symp. Antennas Propag., Jul. 2012, pp. 1-2. V. Viikari et al., “Technical solutions for automotive intermodulation radar for detecting vulnerable road users,” inProc. IEEE Veh. Technol. Conf., Apr. 2009, pp. 1–5
7. Singh A. and Lubecke V. Respiratory monitoring and clutter rejection using a CW Doppler radar with passive RF tags, IEEE Sensors, Mar. 2012, Vol. 12, No. 3, pp. 558-565,
8. Chioukh L., Boutayeb H., Deslandes D., and Wu K. Noise and sensitivity of harmonic radar architecture for remote sensing and detection of vital signs, IEEE Trans. Microw. Theory Techn., Sep. 2014, Vol. 63, No. 9, pp. 1847-1855.
9. Aniktar H., Baran D., Karav E., Akkaya E., Birecik Y.S., and Sezgin M.Getting the bugs out: A portable harmonic radar system for electronic countersurveillance applications, IEEE Microw. Mag., Nov. 2015, Vol. 16, No. 10, pp. 40-52.
10. Harger R.O. Harmonic radar systems for near-ground in-foliage nonlinear scatterers, IEEE Trans. Aerosp. Electron. Syst., Mar. 1976, Vol. 12, No. 2, pp. 230-245.
11. Tahir N. and Brooker G. Recent developments and recommendations for improving harmonic radar tracking systems, in Proc. 5th European Conf. Ant. Propagat., EUCAP, Apr. 2011. pp. 1531-1535.
12. Li C., Lubecke V.M., Boric-Lubecke O., Lin J. A review on recent advances in Doppler radar sensors for noncontact healthcare monitoring, IEEE Trans. Microw. Theory Tech., 2013, Vol. 61 (5), pp. 2046-2060. Doi:10.1109/TMTT. 2013.2256924.
13. Cabria L., Garcia J.A., Malaver E., Tazon A. A PHEMT frequency doublingactive antenna with BPSK modulation capability. IEEE Antennas Wireless Propag. Lett., 2004, No. 3 (1), pp. 310-313. Doi:10.1109/LAWP.2004.83882.
14. Rong L. and Hai-Yong W. The re-radiation characteristics of nonlinear target in harmonic radar detection, in Proc. China–Jpn. Joint Microw. Conf., Sep. 2008, pp. 661-664.
15. Mazzaro G.J., Martone A.F., McNamara D.M. Detection of RF electronics by multitone harmonic radar, IEEE Transactions on Aerospace and Electronic Systems, 2014, Vol. 50, No. 1, pp. 477-490.
16. Dardari D. Detection and accurate localization of harmonic chipless tags, EURASIP J. Adv. Signal Process., Aug. 2015, Vol. 77, pp. 1-13.
17. Semenikhina D.V., Chikov N.I., Semenikhin A.I., Gorbatenko N.N. Experimental studies of nonlinear metasurface with metamaterial substrate, 24th Telecommunications Forum (TELFOR), 2016.
18. Semenikhina D.V., Gorbatenko N.N. Analysis of excitation of nonlinear loaded perfectly conducting cylinder coated with the layer of metamaterial using method of integral equations, Radiation and Scattering of Electromagnetic Waves (RSEMW), 2017.
19. Semenikhina D.V. Radiation and Scattering patterns of two-dimensional nonlinear loaded circular cylinder coated with dielectric layer, Antenna Theory and Techniques, 2003. 4th International Conference 9-12 Sept. 2003, Vol. 2, pp. 837-841.
20. Lee H.-M., and Lee H.-S. А metamaterial based microwave absorber composed of coplanar electric-field-coup-led resonator and wire array, Progress In Electromagnetics Research C, 2013, Vol. 34, 111{121}.

Comments are closed.