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Spin Hall effect of a light beam in anisotropic metamaterials

Chinese Physics B 2012年第12期21卷 236-242页

作者：唐明周新星罗海陆文双春 Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education School of Information Science and EngineeringHunan University

We theoretically investigate a switchable spin Hall effect of light （SHEL） in reflection for three specific dispersion relations at an air-anisotropic metamaterial interface. The displacements of horizontal and vertical polarization compo- nents vary with the incident angle at different dispersion relations. The transverse displacements can be obtained with the relevant metamaterial whose refractive index can be arbitrarily tailed. The results of the SHEL in the metamaterial provide a new way for manipulating the transverse displacements of a specific polarization component.

关键词： spin Hall effect of light metamaterials horizontal polarization vertical polarization

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Influence of aircraft surface distribution on electromagnetic scattering characteristics

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Chinese Journal of Aeronautics 2017年第2期30卷 759-765页

作者： Liu Dawei Huang Jun Song Lei Ji Jinzu School of Aeronautic Science and Engineering Beihang University Beijing 100083 China

In this paper,two typical stealth aircraft concepts（wing fuselage blended and flyingwing） were *** three gradually changed surface distribution models with the same planform for each concept were *** on the multilevel fast multipole algorithm（MLFMA）,the vertical polarization transmitting/vertical polarization receiving（VV） and horizontal polarization transmitting/horizontal polarization receiving（HH） radar cross section（RCS） characteristics were simulated with five frequencies between 0.1 and 1.0 *** influences and mechanisms of aircraft surface distribution on electromagnetic scattering characteristics were *** results show that for the wing fuselage blended concept,the W RCS of this frequency range is higher than the HH RCS in most cases,while it is just the opposite for the flying-wing *** for the two aircraft concepts,the RCS levels of HH and W both decrease with the frequency increasing,but the HH RCS has a faster downward *** surface distribution has little influence on HH RCS *** the contrary,it has a significant impact on W RCS characteristics,and the amplitude of the VV RCS increases with the surface thickness.

关键词： Aircraft concept Electromagnetic scattering characteristic Horizontal polarization MLFMA Stealth Surface distribution vertical polarization

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Low profile cavity-embedded ultra-wideband UHF array antenna with end-fire beams

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Journal of Electronic Science and Technology 2024年第2期22卷 24-35页

作者： Huan He Wen-Song Wang Southwest China Institute of Electronic Technology Chengdu610036China School of Electrical and Electronic Engineering Department Nanyang Technological UniversitySingapore639798Singapore

A low-profile,vertically polarized,ultra-wideband array antenna with end-fire beams operating in an ultra-high frequency(UHF)band is developed in this *** array antenna consists of 1×16 log-periodic top-hat loaded monopole antenna arrays and is feasible to embed into a shallow cavity to further reduce the array *** is introduced in the proposed antenna element to reduce profile height and the rectangular top hats are carefully designed to minimize the transverse *** results show that when the antenna array operates in a frequency range of 300 MHz-900 MHz,the end-fire radiation pattern achieves±45°scanning range in the horizontal *** prototypes of the proposed end-fire antenna element and a uniformly spaced linear array(1×2)are fabricated and *** end-fire antenna array should be suitable for airborne applications where low-profile and conformal scanning phased antenna arrays with end-fire radiations are *** design is attractive for airborne platform applications that are used to search,discover,identify,and scout the aerial target with vertically polarized beams.

关键词： End-fire radiation Low-profile vertical polarization Log-periodic array

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