Analytical Estimation of Radar Cross Section of Arbitrary Compact Dipole Array
Keywords:
Dipole array, feed network, impedance mismatch, Radar Cross Section (RCS), reflection, transmissionAbstract
This paper presents the scattering estimation and analysis of an arbitrary phased array with parallel, centre-fed dipole elements, in the presence of mutual coupling. The total Radar Cross Section (RCS) of the uniform dipole array is computed by considering the signal reflections within the array system. The results are shown for two types of feed networks, viz. series feed and parallel feed. The scattering due to higher order reflections and edge effects are neglected. The analytical formulae presented for array RCS emphasize the dependence of scattered field on the design parameters, like dipole length, interelement spacing, geometrical and electrical properties of phase shifters, couplers and terminal impedances. The results indicate that the mutual coupling effect on the overall RCS pattern is identical for both equal and unequal length dipole arrays. This paper identifies the design parameters that can be optimized towards the RCS control of phased array. These parameters include dipolelength, geometric configuration and terminal impedance.
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S. Hu, H. Chen, C. L. Law, Z. Shen, L. Zhu, W. Zhang, and W. Dou, “Backscattering cross section of ultra-wideband antennas,” IEEE Ant. & Wireless Propag. Letters, vol. 6, pp. 70-73, 2007.
D. C. Jenn and S. Lee, “In-band scattering from arrays with series feed networks,” IEEE Trans. Ant. & Propag., vol. 43, pp. 867-873, August 1995.
J. Ling, S. X. Gong, B. Lu, H. W. Yuan, W. T. Wang, and S. Liu, “A microstrip printed dipole antenna with UC-EBG ground for RCS reduction,” JEWA, vol. 23, pp. 607-616, 2009.
Y. Liu and L. You, “Research on the estimation and reduction measures of antenna mode RCS of airborne phased array,” Proc. IEEE 4 th Intl. Symp. on Microwave, Ant. Propag. and EMC Tech. for Wireless Comm., China, pp. 79-82, November 2011.
Y. Liao, S. Yang, H. Ma, and Y. Hou, “Research on scattering property of finite dipole array,” Proc. of 6 th Int. Conf. ITS Telecomm., Chengdu, China, pp. 412-415, June 2006.
L. Zengrui, W. Junhong, L. Limei, and Z. Xueqin, “Study on the scattering property of the impedance terminated dipole array with finite reflector by FDTD method,” IEEE Int. Sym. on Microwave, Ant. Propag. and EMC Tech. for Wireless Comm., China, pp. 1003-1007, August 16-17, 2007.
D. C. Jenn and V. Flokas, “In-band scattering from arrays with parallel feed networks,” IEEE Trans. Ant. & Propag., vol. 44, pp. 172-178, February 1996.
H. L. Sneha, H. Singh, and R. M. Jha, “Mutual coupling effects for radar cross section (RCS) of a series-fed dipole antenna array,” Int. J. Ant. & Propag., vol. 2012, p. 20, August 2012.
H. L. Sneha, H. Singh, and R. M. Jha, “Scattering analysis of an unequal-length dipole array in the presence of mutual coupling,” IEEE Ant. and Propag. Mag., vol. 55, pp. 333-351, August 2013.
C. A. Balanis, “Antenna theory, analysis and design,” New Jersey: John Wiley & Sons, ISBN: 0- 471-66782-X, p. 1117, 2005.
H. E. King, “Mutual impedance of unequal-length antennas in echelon,” IRE Trans. Ant. & Propag., vol. 5, pp. 306-313, July 1957.
