BEAMPATTERN SYNTHESIS FOR FREQUENCY DIVERSE ARRAY BASED ON TIME-MODULATED DOUBLE PARAMETERS APPROACH
Keywords:beampattern synthesis, chaos sequence, frequency diverse array, time modulation
The basic frequency diverse array (FDA) using linearly increasing frequency increments generates a range-angle dependent beampattern. However, it is coupled in range and angle dimensions and is also periodic in range and time, making its applications limited. In this paper, we propose a novel FDA beampattern synthesis approach utilizing the time-modulated double parameters based on the chaos sequence. The chirp signal mechanism is used instead of the single-frequency signal mechanism. Meanwhile, the multi-carrier architecture is used for range-angle decoupling. Satisfactory time-invariant range-angle beampattern can be synthesized for both single and multiple targets locations. Simulation results show the effectiveness of the proposed FDA scheme. Furthermore, comparative study with the existing technology indicates that the proposed approach can provide better performance in spatial focusing and side-lobe suppressing.
Verona, NY, USA, 2006, pp. 215-217.
 M. C. Wicks and P. Antonik, “Frequency diverse array with independent modulation of frequency, amplitude, and
phase,” U.S. Patent 7 319 427, Jan. 15, 2008.
 C. A. Balanis, Antenna theory: analysis and design, 3rd ed. New York, NY, USA: John wiley & sons, 2005.
 Y. Konishi, “Phased array antennas,” IEICE T. Commun., vol. E86B, no. 3, pp. 954-967, Mar. 2003.
 W. Q. Wang, “Frequency diverse array antenna: new opportunities,” IEEE Antennas Propag. Mag., vol. 57, no. 2, pp.
145-152, Apr. 2015.
 J. Farooq, M. A. Temple and M. A. Saville, “Application of frequency diverse arrays to synthetic aperture radar
imaging,” in ICEAA, Torino, Italy, 2007, pp. 447-449.
 J. J. Huang, K. F. Tong and C. J. Baker, “Frequency diverse array with beam scanning feature,” in IEEE Ap-S, San
Diego, CA, USA, 2008, pp. 1982-1985.
 W. Q. Wang and H. Z. Shao, “Range-angle localization of targets by a double-pulse frequency diverse array radar,”
IEEE J. Sel. Topics Signal Process., vol. 8, no. 1, pp. 106-114, Feb. 2014.
 Y. B. Wang, W. Q. Wang and H. Z. Shao, “Frequency diverse array radar Cramér-Rao lower bounds for estimating
direction, range, and velocity,” Int. J. Antenn. Propag., vol. 2014, no. 12, pp. 1-15, 2014.
 M. Secmen, S. Demir, A. Hizal and T. Eker, “Frequency diverse array antenna with periodic time modulated pattern in
range and angle,” in IEEE Radar Conf., Boston, MA, USA, 2007, pp. 427-430
 T. Higgins and S. D. Blunt, “Analysis of range-angle coupled beamforming with frequency-diverse chirps,” in WDD,
Kissimmee, FL, USA, 2009, pp. 140-144.
 W. Khan, I. M. Qureshi and S. Saeed, “Frequency diverse array radar with logarithmically increasing frequency offset,”
IEEE Antennas Wireless Propag. Lett., vol. 14, pp. 499-502, 2015.
 H. Z. Shao, J. Dai, J. Xiong, H. Chen and W. Q. Wang, “Dot-shaped range-angle beampattern synthesis for frequency
diverse array,” IEEE Antennas Wireless Propag. Lett., vol. 15, pp. 1703-1706, 2016.
 W. Khan and I. M. Qureshi, “Frequency diverse array radar with time-dependent frequency offset,” IEEE Antennas
Wireless Propag. Lett., vol. 13, pp. 758-761, 2014.
 A. M. Yao, W. Wu and D. G. Fang, “Frequency diverse array antenna using time-modulated optimized frequency offset
to obtain time-invariant spatial fine focusing beampattern,” IEEE Trans. Antennas Propag., vol. 64, no. 10, pp. 4434-
4446, Oct. 2016.
 Y. X. Wang, W. Li, G. C. Huang and J. L. Li, “Time-invariant range-angle-dependent beampattern synthesis for FDA
radar targets tracking,” IEEE Antennas Wireless Propag. Lett., vol. 16, pp. 2375-2379, 2017.
 C. Maffrand, D. Zarate, M. A. Zon, H. Fernandez and M. R. Romero, “Arbitrary waveform generator using FPGA for
applications in ultrafast scan voltammetry,” in Proc. IEEE IX Southern Conf. Program. Logic, Buenos Aires,
Argentina, 2014, pp. 1-6.
 T. Eker, S. Demir and A. Hizal, “Exploitation of linear frequency modulated continuous waveform (LFMCW) for
frequency diverse arrays,” IEEE Trans. Antennas Propag., vol. 61, no. 7, pp. 3546-3553, Jul. 2013.