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Multiperformance indices of an E-band three-dimensional (3-D)-printed all-dielectric lens antenna are fulfilled by an automatic synthesis algorithm. By hybridizing particle swarm optimization and genetic algorithm optimization, the algorithm possesses the advantages of fast optimization and avoiding of local optimum. Multiobjective subfunctions are defined to realize multiperformance indices, and the objective subfunctions are customized to make the optimization process more efficient. As the all-dielectric lens is optimized, the source horn is included to direct acquire the performance indices (|S11|, axial ratio, and gain), which makes the optimization process efficient and accurate. Moreover, the optimization process is automatic as the structure modeling and sizing are performed automatically. The proposed lens antenna has good S11, axial ratio, and gain performances in the 60–90 GHz band, which shows that the algorithm is a powerful method for multiple goals. [ABSTRACT FROM AUTHOR]

A lens antenna (LA) with the characteristics of ultrawide band and high aperture efficiency is proposed in this letter. Moreover, the proposed lens is automatically designed by the genetic algorithm (GA) and finite-different time-domain method, which provides a convenient solution for lens designing. Compared to the feeding ridged horn, the measured gains of the LA are enhanced by 4.4–7.4 dB in the 6–18 GHz band, and the measured aperture efficiencies are also increased by 10%–33% in the band. The maximum aperture efficiency is 92.4% at 6 GHz. Moreover, the 1 dB steady gain band is 13–18 GHz (up to 32.3%). The all-dielectric structure can be easily manufactured using three-dimensional printing technology, which endues the lens with the advantages of low cost, light weight, and easy fabrication. [ABSTRACT FROM AUTHOR]

An ultra broadband all-dielectric transmitarray antenna (TA) is designed based on genetic algorithm optimization (GAO) and 3-D print fabrication technology. The array element is composed of all-dielectric pillars with different sizes distributed on the two sides of a substrate. The element is operating in the out-of-band resonance (OBR) zone, whose transmission amplitude is nearly one and the phase can be easily controlled. Afterward, the geometric parameters of the elements on different positions of the TA surface were optimized using generalized Snell’s Law-based GAO, which achieved broadband phase compensation and good transmission performance. As the structure is all- dielectric, it can be easily manufactured using 3-D printing technology. The TA was fed by a ridged horn, and the antenna gains are enhanced by 7–12 dB in the measuring band (9–20 GHz). Moreover, the 1 dB steady gain ranges from 14.5 to 20 GHz (up to 29%). [ABSTRACT FROM AUTHOR]