针对微带贴片天线宽带化和小型化的设计需求,提出并设计了一种工作在 S/C波段的改进的 U 形槽微带贴片天线.通过在辐射贴片中心开曲折 U形槽,使缝隙和馈电探针偏离贴片中心,形成非对称曲折 U 形槽的层叠介质微带贴片天线.通过共面容性耦合馈电进一步提高天线的阻抗带宽.实测结果表明:该天线在3.11～5.40 GHz频率范围内回波损耗小于-10 dB,相对带宽可达 53.8%,与仿真结果吻合,可为微带天线的小型化、宽带化设计提供参考.
Abstract
To achieve a wide bandwidth and miniaturization of microstrip patch antennas,a modified U-slot mi-crostrip patch antenna operating at S/C band was presented in this paper.By embedding a meandered U-shaped slot at the center of a rectangular radiating patch and then deviating the slot and the feeding probe from the patch center,a dissymmetric meandered U-slot microstrip patch antenna with a stacked substrate was obtained,in which the coplanar capacitive coupling feeding method was taken to further widen its impedance bandwidth.Measurement results showed that within 3.11～5.40 GHz,the return loss of the antenna was lower than-10 dB,with a relative impedance bandwidth of 53.8%,as agreed well with simulation results.The radiating patch had a radiating patch area of 0.426λ0×0.326λ0,λ0 was the wavelength of the central frequency of the antenna.
维普
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