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oe1(光电查) - 科学论文

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  • Using metasurface structures as signal polarisers in microstrip antennas

    摘要： This study analyses the influence of a metasurface coupled to a rectangular microstrip antenna. The proposed metasurface converts linearly polarised electromagnetic waves into circularly polarised electromagnetic waves. The rectangular microstrip antenna is designed to operate at 2.45?GHz. The metasurface is coupled to the antenna in order to provide a structure capable of radiating circularly polarised electromagnetic waves without the need for adjustments to the antenna feed. In this analysis, the metasurface was designed from unit cells, distributed in a periodic arrangement acting as a polariser, when coupled to the upper part of the antenna. The geometry of the unit cells and their distribution in the arrangement were calculated in order to obtain an axial ratio below 3?dB in the design frequency range. Prototypes of the microstrip antenna and the metasurface were constructed to obtain experimental results and it was possible to observe a good convergence between the simulated and measured results.

    关键词： metasurface,axial ratio,wireless communication,circular polarisation,microstrip antenna

    更新于2025-09-10 09:29:36

  • [Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Wideband High-Gain Circularly-Polarised Antenna based on Fabry-Perot Concept and a Conical Horn

    摘要： A novel wideband high-gain circularly-polarised (CP) antenna is presented in this paper. A hybrid design based on Fabry-Perot cavity and a short conical horn is applied to a small CP slot-fed patch antenna for wideband and high-gain operation. Simulations and experiments are conducted to validate the design and a good agreement is obtained. The measurements of the antenna prototype show a 3-dB axial ratio bandwidth of 12% and a peak gain of 16.3 dBi.

    关键词： conical horn,wideband,circular polarisation,high gain,Fabry-Perot resonator antenna

    更新于2025-09-04 15:30:14