Abstract
With the rapid development of modern electronic technologies, antenna arrays typically operate in very complex electromagnetic environments. However, owing to the various errors such as systematic errors and random errors, conventional antenna arrays have relatively high sidelobes. Time modulated arrays (TMAs), also known as four-dimensional (4-D) antenna arrays, introduce time as an additional dimension for generating ultra-low sidelobes at fundamental component and realizing real-time beam scanning by harmonic components. Recently, the harmonic components can also be developed for various new applications including wireless communications and radar systems. In this review, we introduce comprehensively the fundamental methodologies and recent applications of TMAs. This aims to stimulate continuing efforts for the understanding of TMAs and explore their applications in various aspects. The methods mentioned in this review include three aspects: sideband radiation suppression, power efficiency of TMAs, and applications of harmonic components. These methods either improve the existing TMAs or promote the practical applications of TMAs. First, to suppress the sideband radiation, a method using non-uniform periodical modulation is introduced. The proposed method has an advantage of low computation and can be easily used for synthesizing a real-time radiation pattern according to the environmental need. Next, a TMA structure using reconfigurable power dividers/combiner is introduced to improve the power efficiency of feeding network. Finally, three applications of harmonic component including direction finding, calibration method, and space division multiple access are separately introduced to illustrate the development potential of TMAs.
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References
P. J. Bevelacqua, C. A. Balanis. Minimum sidelobe levels for lineararrays [J]. IEEE Trans. Antennas Propag, 2007, 55(12): 3442–3449.
G. Cardone, G. Cincotti, M. Pappalardo. Design of wide-bandarrays for low sidelobe level beam patterns by simulated annealing [J]. IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, 2002, 49(8): 1050–1059.
N. H. Farhat, B. Bai. Phased-array antenna pattern synthesis bysimulated annealing [J]. Proceedings of the IEEE, 1987, 75(6): 842–844.
V. Murino, A. Trucco, C. S. Regazzoni. Synthesis of unequaly spaced arrays by simulated annealing [J]. IEEE Transactions on Signal Processing, 1996, 44(1): 119–122.
R. L. Haupt. Thinned arrays using genetic algorithms [J]. IEEE Trans. Antennas Propag, 1994, 42(7): 991–993.
F. J. Ares, J. A. Rodriguez, E. Villanueva, et al. Genetic algorithm in the design and optimization of antenna arraypatterns [J]. IEEE Trans. Antennas Propag., 1999, 47(3): 506–510.
H. M. Elkamchouchi, M. M. Hassan. Array pattern synthesis approach using a genetic algorithm [J]. IET Microwaves, Antennas & Propagation, 2014, 8(14): 1236–1240.
T. H. Ismail, Z. M. Hamici. Array pattern synthesis using digitalphase control quantized particle swarm optimization [J]. IEEE Trans. Antennas Propag., 2010, 58(6): 2142–2145.
G. Oliveri, A. Massa. Bayesian compressive sampling for patternsynthesis with maximally sparse non-uniform linear arrays [J]. IEEE Trans. Antennas Propag., 2011, 59(2): 467–481.
H. E. Shanks, R. W. Bickmore. Four-dimensional electromagneticradiators [J]. Canadian Journal of Physics, 1959, 37(3): 263–275.
H. E. Shanks. A new technique for electronic scanning [J]. IEEE Trans. Antennas Propag., 1961, 9(2): 162–166.
W. H. Kummer, A. T. Villeneuve, T. S. Fong, et al. Ultra-low sidelobes from time-modulated arrays [J]. IEEE Trans. Antennas Propag., 1963, 11(6): 633–639.
S. W. Yang, Z. P. Nie. A review of the four dimension antennaarrays [J]. Journal of Electronic Science and Technology of China, 2006, 4(3): 193–201.
W. Q. Wang, H. C. So, A. Farina. An overview on time/frequency modulated array processing [J]. IEEE Journal of Selected Topics in Signal Processing, 2017, 11(2): 228–246.
S. Yang, Y. B. Gan, A. Qing. Sideband suppression in time modulated linear arrays by the differential evolution algorithm [J]. IEEE Antennas Wireless Propag. Lett., 2002, 1(1): 173–175.
J. C. Bregains, J. Fondevila-Gomez, G. Franceschetti, et al. Signal radiation and power losses of time-modulated arrays [J]. IEEE Transactions on Antennas & Propagation, 2008, 56(6): 1799–1804.
J. Fondevila, J. C. Bregains, F. Ares, et al. Optimizing uniformly excited linear arrays through time modulation [J]. IEEE Antennas & Wireless Propagation Letters, 2004, 3(1): 298–301.
L. Poli, P. Rocca, L. Manican, et al. Handling sideband radiations in time-modulated arrays through particle swarm optimization [J]. IEEE Transactions on Antennas & Propagation, 2010, 58(4): 1408–1411.
S. Pal, S. Das, A. Basak. Design of time-modulated linear arrays with a multi-objective optimization approach [J]. Progress in Electromagnetics Research B, 2010, 23(23): 83–107.
J. Yang, W. T. Li, X. W. Shi, et al. A hybrid ABC-DE algorithm and its application for time-modulated arrays pattern synthesis [J]. IEEE Transactions on Antennas & Propagation, 2013, 61(11): 5485–5495.
S. Yang, Y. B. Gan, A. Qing. Design of a uniform amplitude timemodulated linear array with optimized time sequences [J]. IEEE Transactions on Antennas & Propagation, 2005, 53(7): 2337–2339.
L. Poli, P. Rocca, L. Manica, et al. Pattern synthesis in time modulated linear arrays through pulse shifting [J]. IET Microwaves, Antennas & Propagation, 2010, 4(9): 1157–1164.
Q. Zhu, S. Yang, L. Zheng, et al. Design of a low sidelobe time modulated linear array with uniform amplitude and sub-sectional optimized time steps [J]. IEEE Transactions on Antennas & Propagation, 2012, 60(9): 4436–4439.
E. T. Bekele, L. Poli, P. Rocca, et al. Pulse-shaping strategy for time modulated arrays-analysis and design [J]. IEEE Transactions on Antennas & Propagation, 2013, 61(7): 3525–3537.
C. He, H. Yu, X. Liang, et al. Sideband radiation level suppression in time-modulated array by nonuniform period modulation [J]. IEEE Antennas & Wireless Propagation Letters, 2015, 14: 606–609.
Y. Z. Tong. Time modulated linear arrays [D]. University of Sheffield, 2013: 1–4.
A. Tennant, B. Chambers. A two-element time-modulated array with direction finding properties [J]. IEEE Antennas & Wireless Propagation Letters, 2007, 6(11): 64–65.
A. Tennant. Experimental two-element time-modulated direction fnding arrays [J]. IEEE Transactions on Antennas & Propagation, 2010, 58(3): 986–988.
A. Tennant, B. Chambers. Direction finding using a four-element time-switched array system [C]//Antennas & Propagation Conference, Loughborough, 2008: 3.
G. Li, S. Yang, Z. Nie. Direction of arrival estimation in time modulated linear arrays with unidirectional phase center motion [J]. IEEE Transactions on Antennas & Propagation, 2010, 58(4): 1105–1111.
A. O’Donnell, W. Clark, J. Ernst, et al. Analysis of modulated signals for direction finding using time modulated arrays [C]//Radar Conference, Philadelphia, 2016: 1–5.
G. Li, S. Yang, Y. Chen, et al. A novel beam scanning technique in time modulated linear arrays [C]//IEEE Antennas & Propagation Society International Symposium, North Charleston, 2009: 1–4.
Y. Tong, A. Tennant. Simultaneous control of sidelobe level and harmonic beam steering in time-modulated linear arrays [J]. Electronics Letters, 2010, 46(3): 201–202.
G. Li, S. Yang, Y. Chen, et al. An adaptive beamforming in time modulated antenna arrays [C]//International Symposium on Antennas, Kunming, 2008: 221–224.
L. Poli, P. Rocca, G. Oliveri, et al. Harmonic beamforming in timemodulated linear array [J]. IEEE Transactions on Antennas & Propagation, 2011, 59(7): 2538–2545.
Q. Zhu, S. Yang, P. Rocca, et al. Signal-to-noise ratio and timemodulated signal spectrum in four-dimensional antenna arrays [J]. IET Microwaves, Antennas & Propagation, 2014, 9(3): 264–270.
D. Masotti, A. Costanzo, M. D. Prete, et al. Time-modulation of linear arrays for real-time reconfigurable wireless power transmission [J]. IEEE Transactions on Microwave Theory & Techniques, 2016, 64(2): 331–342.
A. M. Yao, W. Wu, D. G. Fang. Single-sideband time-modulated phased array [J]. IEEE Transactions on Antennas & Propagation, 2015, 63(5): 1957–1968.
P. Rocca, Q. Zhu, E. T. Bekele, et al. 4-D arrays as enabling technology for cognitive radio systems [J]. IEEE Transactions on Antennas & Propagation, 2014, 62(3): 1102–1116.
C. He, X. Liang, Z. Li, et al. Direction finding by time-modulated array with harmonic characteristic analysis [J]. IEEE Antennas & Wireless Propagation Letters, 2015, 14: 642–645.
C. He, X. Liang, B. Zhou, et al. Space-division multiple access based on time-modulated array [J]. IEEE Antennas & Wireless Propagation Letters, 2015, 14: 610–613.
C. He, X. Liang, J. Geng, et al. Parallel calibration method for phased array with harmonic characteristic analysis [J]. IEEE Transactions on Antennas & Propagation, 2014, 62(10): 5029–5036.
J. Chen, X. Liang, C. He, et al. High-sensitivity OAM phase gradient detection based on time-modulated harmonic characteristic analysis [J]. Electronics Letters, 2017, 53(12): 812–814.
Y. Tong, A. Tennant. A two-channel time-modulated linear array with adaptive beamforming [J]. IEEE Transactions on Antennas & Propa gation, 2012, 60(1): 141–147.
G. Bogdan, Y. Yashchyshyn, M. Jarzynka. Time-modulated antenna array with lossless switching network [J]. IEEE Antennas & Wireless Propagation Letters, 2016, 15: 1827–1830.
J. Chen, X. Liang, C. He, et al. Efficiency improvement of time modulated array with reconfigurable power divider/combiner [J]. IEEE Transactions on Antennas & Propagation, 2017, 65(8): 4027–4037.
Q. Zhu, S. Yang, R. Yao, et al. Direction finding using multiple sum and difference patterns in 4D antenna arrays [J]. International Journal of Antennas & Propagation, 2014, 2014 (2): 1–12.
A. O’Donnell, W. Clark, J. Ernst, et al. Analysis of modulated signals for direction finding using time modulated arrays [C]//IEEE Radar Conference, Philadelphia, 2016: 1–5.
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This work is supported by the National Natural Science Foundation of China (No. 61571298).
Chong He received his B.S. degree in electronic and information engineering and M.S. degree in electromagnetic and microwave technology from Huazhong University of Science and Technology, Wuhan, China, in 2007 and 2009 respectively, and the Ph.D. degree in electronic engineering from Shanghai Jiao Tong University, Shanghai, China, in 2015. Since 2016, he has been a postdoctor researcher in Department of Electronic Engineering, Shanghai Jiao Tong University. His research interests include phased arrays, DOA estimation, DBF, location and calibration techniques. (Email: hechong@sjtu.edu.cn)
Lele Wang received his B.S. degree in applied physics from Hubei University of Education and M.S. degree in plasma physics from Huazhong University of Science and Technology, Wuhan, China. He is currently working toward his Ph.D. degree at Shanghai Jiao Tong University, Shanghai, China. His research interests include antenna arrays, unconventional array design, DBF, and weqsas DOA estimation. (Email: lele wang@sjtu.edu.cn)
Jing feng Chen received his B.S. degree in electronics and information engineering and M.S. degree in signal and information processing from Nanjing University of Information Science & Technology, Nanjing, China, in 2009 and 2012, respectively. He is currently working toward his Ph.D. degree at Shanghai Jiao Tong University, Shanghai, China. His research interests include antenna arrays, unconventional array design, DBF, and DOA estimation. (Email: laowu3917@163.com)
Ronghong Jin [corresponding author] received his B.S. degree in electronic engineering, the M.S. degree in electromagnetic and microwave technology, and his Ph.D. degree in communication and electronic systems from Shanghai Jiao Tong University (SJTU), Shanghai, China, in 1983, 1986, and 1993, respectively. In 1986, he joined the faculty of the Department of Electronic Engineering, SJTU, where he has been an Assistant, a Lecturer, an Associate Professor, and is currently a Professor. From 1997 to 1999, he was a visiting scholar with the Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, Meguro, Japan.
From 2001 to 2002, he was a Special Invited Research Fellow with the Communication Research Laboratory, Tokyo, Japan. From 2006 to 2009, he was a Guest Professor with the University ofWollongong,Wollongong, NSW, Australia. He is also a Distinguished Guest Scientist with the Commonwealth Scientific and Industrial Research Organization, Sydney, NSW, Australia. He has authored or co-authored over 300 papers in refereed journals and conference proceedings and co-authored four books. He holds about 60 patents in antenna and wireless technologies. His current research interests include antennas, electromagnetic theory, numerical techniques of solving field problems, and wireless communication.
Dr. Jin is a Committee Member of the Antenna Branch of the Chinese Institute of Electronics, Beijing, China. He was a recipient of the National Technology Innovation Award, the National Nature Science Award, the 2012 Nomination of National Excellent Doctoral Dissertation (Supervisor), the Shanghai Nature Science Award, and the Shanghai Science and Technology Progress Award. (Email: rhjin@sjtu.edu.cn)
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He, C., Wang, L., Chen, J. et al. Time-Modulated Arrays: A Four-Dimensional Antenna Array Controlled by Switches. J. Commun. Inf. Netw. 3, 1–14 (2018). https://doi.org/10.1007/s41650-018-0004-7
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DOI: https://doi.org/10.1007/s41650-018-0004-7