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Time modulated planar arrays with square lattices and circular boundaries. (English) Zbl 1076.78507

Summary: The time modulation approach is extended to planar antenna arrays with square lattices and circular boundaries to synthesize ultra-low sidelobe patterns. Time modulation is achieved by switching on-off each of the array elements in pre-determined sequences, thus introducing an additional degree of design freedom to reduce the dynamic-range ratio and error tolerance requirements. The generalized Tseng-Cheng distributions, which generate axis-symmetric patterns in all \(\varphi\)-cuts for planar arrays with square lattices and boundaries, are utilized in the synthesis of time modulated planar arrays. The sideband levels of the time modulated planar arrays are effectively suppressed by utilizing the differential evolution (DE) algorithm. Numerical results show that ultra-low sidelobes can be synthesized for time modulated planar arrays, with very low dynamic-range ratio, low sideband levels and minimal reduction in directivity.

MSC:

78A50 Antennas, waveguides in optics and electromagnetic theory
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[1] Tseng, Proceedings of the IEEE 56 pp 1771– (1968)
[2] Kim, Journal of Electromagnetic Waves and Applications 2 pp 255– (1988)
[3] Botha, Microwave and Optical Technology Letters 6 pp 623– (1993)
[4] McNamara, IEE Proceedings Part H 136 pp 245– (1989)
[5] Rivas, IEEE Antennas and Propagation Magazine 43 pp 90– (2001)
[6] Schrank, IEEE Antennas Propagation Society Newsletter 25 pp 4– (1983)
[7] Time versus space in antenna theory. In Microwave Scanning Antennas, (ed.), vol. III. Academic Press: New York, 1966.
[8] Kummer, IEEE Transactions on Antennas and Propagation 11 pp 633– (1963)
[9] Yang, IEEE Antennas and Wireless Propagation Letters 1 pp 173– (2002)
[10] Villeneuve, IEEE Transactions on Antennas and Propagation 32 pp 1089– (1984)
[11] Qing, IEEE Transactions on Antennas and Propagation 51 pp 1251– (2003)
[12] Yang, International Journal of RF and Microwave Computer-Aided Engineering 14 pp 57– (2004)
[13] Planar arrays. In The Handbook of Antenna Design, , , (eds), vol. 2. Peter Peregrinus: London, UK, 1983.
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