A Projection-Based Approach for Ultra-Low Side-Lobe Pattern Synthesis in Time-Modulated Spherical Arrays

作者：Zheng, Li; Yang, Shiwen^*; Zhu, Quanjiang; Nie, Zaiping

来源：Electromagnetics, 2012, 32(2): 61-76.

DOI：10.1080/02726343.2012.645420

• spherical arrays
• time modulation
• projection
• differential evolution algorithm
• ultra-low side-lobe

The time-modulation approach is extended to spherical antenna arrays to synthesize ultra-low side-lobe patterns. A projection approach combined with the generalized Tseng-Cheng distributions, which generate axis-symmetric patterns in all phi-cuts for planar arrays with square lattices and boundaries, is utilized in the synthesis of time-modulated spherical arrays. Patterns with an approximately Dolph-Chebyshev profile for all phi-cuts are successfully synthesized by phase compensation using the differential evolution algorithm. Numerical results show that ultra-low side-lobes can be synthesized for time-modulated spherical arrays, with very low dynamic-range ratios, low sideband levels, and minimal reduction in directivity and efficiency.

• 出版日期2012
• 单位电子科技大学