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Scattering of particles in wave beam based on series expansion

Chinese Physics B 2014年第6期23卷 165-169页

作者：李应乐李瑾董群锋王明军 Shaanxi Xueqian Normal University Institute of Radio Wave Propagation & Scattering Xianyang Normal University

Based on the orthogonalities of the vector wave functions, the expressions of scattering fields are developed as the particle in the zero order field and in the first order fields of x, y, and z, respectively. A general relation between the expansion coefficients of scattering field and incident field is presented. Taking the elliptical beam for example, the scattering property of a particle in beam is investigated. After analyzing the effects of the beam waist, irradiating distance, etc. on scattering property, the validity of the proposed algorithm is demonstrated. Results show that the beam waist may improve the particle identification property and the particle has a strong scattering both in the forward direction and in the backward direction. The method proposed is simple and is a new way of researching the scattering from particles in electromagnetic beams.

关键词： scattering electromagnetic beam Gaussian beam

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High quality-performance by changing parameters of antenna array

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Journal of Central South University 2022年第1期29卷 146-156页

作者： XU Xue-mei WEN Jun CHENG Wei SUN Ke-hui DING Yi-peng JIANG Zhao-hui School of Physics and Electronics Central South UniversityChangsha 410083China School of Automation Central South UniversityChangsha 410083China

Several antennas based on cylindrical array and uniform hexagonal array are designed and fabricated on flexible *** validate the designed prototypes,the antennas are fabricated and their performance is *** highlight scheme is to improve the signal performance and electromagnetic field distribution by appropriately changing the parameters of the antennas array,signal frequencies,and steering *** proposed antennas array is capable of applying shaping radiation band technique to generate tunable power and radiation *** distribution of the field,and the bit-error-rate transmigration coefficient characteristics are *** results show that the proposed scheme can achieve better performance by searching the optimal parameters of antenna array.

关键词： array antenna structure bit-error-rate electromagnetic beam antenna parameters high speed frequencies

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