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oe1(光电查) - 科学论文

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  • The Design of Dual Circularly Polarized Series-Fed Arrays

    摘要： This paper presents the design of dual circularly polarized (CP) series-fed arrays based on Sequential rotation (SR) technique with uniform radiation elements. The radiation elements and feeding network used in the array are uniform, which leads to the possibility of dual-CP radiation by series-fed SR arrays. Meanwhile, the elements radiate unequal powers due to this arrangement. The relationship between the axial ratio (AR) and four key parameters of the array is derived and thoroughly discussed. Good polarization purity and port isolation can be realized by optimizing these parameters. A dual-CP array working at 10 GHz is designed with the help of the analysis. Experimental results show that the proposed antenna has good properties.

    关键词： Circularly polarized antenna,Series-Fed array,Sequential rotation,Dual circularly polarized,Antenna array,Axial ratio

    更新于2025-09-23 15:21:01

  • Single-Layer Series-Fed Planar Array with Controlled Aperture Distribution for Circularly Polarized Radiation

    摘要： We propose a compact circularly polarized series-fed patch array with enhanced radiation performance at S-band. To our best knowledge, no similar single-layer structure has been designed, measured and reported in the literature with equivalent radiation performances in terms of reduced sidelobe-level (SLL) and aperture efficiency as well as compactness and simplicity. The planar array consists of a 50-? microstrip single feed point, offering uniform and efficient excitation of all its elements that enables a broadside beam with high-gain and low sidelobes. A feed network for such aperture control is designed and optimized to provide good impedance matching with a two-point excitation per radiating element, which is based on 0? and 90? meander lines to enable circularly polarized radiation. A structure made by a 4×1 arrangement of square patches is simulated, optimized, and manufactured, providing a realized gain of about 10 dBic and a SLL below ?15 dB. Very good axial ratios and high efficiencies are obtained. The proposed antenna may be of interest for next-generation far-field wireless power transmission systems and other applications including target tracking, radar and internet of things technologies requiring efficient circularly polarized radiation.

    关键词： radar,series-fed array,Controlled aperture distribution,wireless power transfer,circular polarization

    更新于2025-09-16 10:30:52