Document Type : Original Research Paper

Authors

School of Electrical and Computer Engineering, Tarbiat Modares Universty, Tehran, Iran

Abstract

In this paper, a new method for radar cross section reduction of a monopole antenna is proposed. In this method, a plasma helix like fluorescent bulbs is placed around the antenna element. The selected plasma parameter for this medium acts as an absorber without disturbing the antenna performance. The simulations show that radar cross section of simulated antenna is reduced in a wide frequency range. In this paper, the plasma parameter is chosen in such a way that reduces RCS at 4GHz. At this frequency, the radar cross section reduction is about 10dBsm. Due to the frequency dependent of the plasma medium, the plasma parameter must be changed for better result in the other frequencies. This change can be performed electrically without any change in the antenna structure. In this simulation, a PEC rode with 3cm diameter and 15cm height is chosen for the monopole antenna element. This monopole antenna resonates at 630 MHz. After placing the plasma helix around the antenna element, there is no significant change in the antenna performance.

Graphical Abstract

Monopole Antenna Radar Cross Section Reduction with Plasma Helix

Keywords

[1] M.I. Skolnik, Introduction to Radar Systems, Tata McGraw-Hill, pp. 49-64, 2001

[2] W.H. Emerson, Electromagnetic Wave Absorbers, Useful Tools for Engineer, Emerson and Cumming Co. Manual, 1984. [3] M. Laroussi and l.R. Roth, “Numerical calculation of the reflection, absorption, and transmission of microwaves by a nonuniformnplasma slab,” IEEE Trans. on Plasma Science, vol. 21, no. 4, pp. 366-372, 1993.

[4] B. Chaudhury and S. Chaturvedi, “Three dimensional computation of reduction in radar cross section using plasma shielding,” IEEE Trans. on Plasma Science, vol. 33, pp. 2027- 2034, 2005.

[5] K.G. Budden, The Propagation of Radio Waves, Cambridge Univ. Press, pp. 470-475, 550-582, 1985.

[6] H. Singh, A. Simy, and M.J. Rakesh, Plasma-based Radar Cross Section Reduction, Springer Singapore, 2016.

[7] B. Chaudhury and C. Shashank “Radar cross section reduction using plasma blobs: 3-D finite difference time domain simulations,” in Proc. Applied Electromagnetics Conf., Kolkata, India, 2007.

[8] B. Jazi, Z. Rahmani, and B. Shokri, “Reflection and absorption of electromagnetic wave propagation in an inhomogeneous dissipative magnetized plasma slab,” IEEE Transactions on Plasma Science, vol. 412 , pp. 290-295, 2013. [9] R. Wu, et al., “RCS analysis of disk target covered with nonuniform plasma,” in Proc. IET International Radar Conf., Hangzhou, China, 2015.

[10] K. Takahagi, et al., “Study on radar cross section for the plasma antenna in UHF band,” in Proc. Asia-Pacific Microwave Conf., Japan, 2014.


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