Design of low-scattering transmissive lens based on integration of absorption with focusing

Hu Jiaqi; Li Zhenyu; Wang Zuxin; Shang Yuping; Wang Sihao; Liao Cheng

doi:10.11884/HPLPB202133.210169

Volume 33 Issue 10

Oct. 2021

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Hu Jiaqi, Li Zhenyu, Wang Zuxin, et al. Design of low-scattering transmissive lens based on integration of absorption with focusing[J]. High Power Laser and Particle Beams, 2021, 33: 103005. doi: 10.11884/HPLPB202133.210169

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Hu Jiaqi, Li Zhenyu, Wang Zuxin, et al. Design of low-scattering transmissive lens based on integration of absorption with focusing[J]. High Power Laser and Particle Beams, 2021, 33: 103005. doi: 10.11884/HPLPB202133.210169

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Design of low-scattering transmissive lens based on integration of absorption with focusing

doi: 10.11884/HPLPB202133.210169

Institute of Electromagnetic Field and Microwave Technology, Southwest Jiaotong University, Chengdu 610031, China

Received Date: 2021-05-08
Rev Recd Date: 2021-08-10

Available Online: 2021-09-04

Publish Date: 2021-10-15

Abstract

Abstract

Based on the integration of a transmissive metasurface lens with the circuit analog absorber, the design of a microwave composite material with characteristics of both transmissive wavefront conversion and out-of-band radar cross-section reduction is proposed and examined. With the refraction tuned by gradient phase compensation, the lens consisting of sub-wavelength spaced layers of periodic inclusions exhibits a reciprocal conversion between planar and spherical wavefronts. Moreover, the responses of the lens at the lower side of the wavefront conversion band are used to construct a circuit analog absorption profile containing one lossy layer. By using an aperture-coupled microstrip patch antenna element as the primary feeding antenna, main lobe gain enhancement over a wide band is observed as a result of the wavefront conversion of the composite material. In comparison with the lens, the introduction of the circuit analog absorption profile produces radar cross-section reduction over the bandwidths of 130.68% and 155.11% for TE and TM polarizations, respectively. The full-wave simulation and experimental measurement demonstrate the enhanced radiation gain and reduced radar cross-section and illustrate the validity of the composite material design with integrated absorption and focusing.
- microwave composite material,
- circuit analog absorber,
- metasurface lens,
- radar cross-section,
- high-gain antenna

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References

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