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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >Design and characterization of an efficient multi-layered circularly polarized microstrip antenna
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Design and characterization of an efficient multi-layered circularly polarized microstrip antenna

机译：高效多层圆极化微带天线的设计与表征

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摘要

A novel asymmetric + shaped fractal slotted circularly polarized microstrip antenna with a Yagi-Uda structure is proposed. Four asymmetric plus shape slots are embedded symmetrically in the center of all four quadrants of a square patch. To suppress undesirable higher modes, dumbbell-shaped defected ground structure (DGS) is introduced at the ground layer of the antenna. We introduce a method to compensate the reduction in gain occurring due to the presence of DGS, without changing in the overall size of the antenna. A 3 dB axial ratio bandwidth of 4 MHz at center frequency of 862 MHz, 10 dB impedance bandwidth of 13.20 MHz and a gain of 4.25 dB is achieved with the proposed antenna. A laboratory prototype of the proposed antenna is made to cross-verify the simulation results. Very good agreements between the two are obtained. The proposed antenna may prove useful for International Mobile Telecommunication application for designing high-gain arrays.
机译：提出了一种具有八木宇田结构的新型不对称+形分形缝隙圆极化微带天线。四个不对称加形状的槽对称地嵌入在方形贴片的所有四个象限的中心。为了抑制不希望的较高模式，在天线的接地层引入了哑铃状的缺陷接地结构（DGS）。我们引入一种方法来补偿由于DGS的存在而导致的增益降低，​​而无需改变天线的整体尺寸。所提出的天线在中心频率为862 MHz时具有3 dB的轴向比率带宽为4 MHz，在10 dB的阻抗带宽为13.20 MHz时，增益为4.25 dB。制作了拟议天线的实验室原型，以交叉验证仿真结果。两者之间达成了很好的协议。所提出的天线可能被证明对于设计高增益阵列的国际移动电信应用很有用。

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