A Bandwidth-Enhanced, Compact, Single-Feed, Low-Profile, Multilayered, Circularly Polarized Patch Antenna
A Bandwidth-Enhanced, Compact, Single-Feed, Low-Profile, Multilayered, Circularly Polarized Patch Antenna
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带宽增强、紧凑、单馈、薄型、多层、圆极化贴片天线
DOI：
10.1109/lawp.2017.2713239
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发表时间：
2017-01-01
影响因子：
4.2
通讯作者：
Ziolkowski, Richard W.
中科院分区：
文献类型：
--
作者：
Tang, Ming-Chun;Chen, Xiaoming;Ziolkowski, Richard W.
提出了一种带宽增强型、紧凑型、单馈源、低剖面、多层圆极化贴片天线。在特殊设计的辐射贴片的正下方引入了一个截角贴片作为近场共振寄生元件。在不牺牲天线的低轮廓和紧凑尺寸的情况下，它的存在不仅引入了一对新的正交近简并的谐振模式，而且还从主贴片的交叉缝隙中恢复了类似的一对模式。借助于这些贴片上的圆形缝隙和曲折线缝隙，所得到的三对相邻的近简并模式已经成功地与相同的顺时针极化相结合，与相同高度的传统单层贴片天线相比，CP带宽提高了两倍以上。测量结果与模拟值吻合较好，结果表明，该天线结构低调：0.016 nm(0)，阻抗带宽为-10dB，接近4.6%n，3dB轴比带宽约为2.33%，在该带宽内实现了4.5dBI+/-0.15dBI的增益。对电流分布的分析被用来解释寄生补丁的贡献，进一步的仿真研究验证了我们的设计准则，并显示了它的优势。
A bandwidth-enhanced, compact, single-feed, low profile, multilayered, circularly polarized (CP) patch antenna is presented. A corner-truncated patch is introduced as a near-field resonant parasitic element directly beneath a specially engineered radiation patch. Without sacrificing the antenna's low profile and compact size, its presence not only introduces a new pair of orthogonal near-degenerate resonant modes, but also recovers a similar pair from the cross slot of the main patch. With the aid of both circular slots and meander-line slots on these patches, the resulting three pairs of adjacent near-degenerate modes have been successfully combined with the same clockwise polarization to enhance the CP bandwidth by more than a factor of two when compared to the same-height conventional single-layer patch antennas. Measured results are in good agreement with their simulated values and demonstrate that the reported antenna is low-profile: 0.016 lambda(0), achieves a-10-dB impedance bandwidth of similar to 4.6%n, and a 3 dB axial-ratio bandwidth of about 2.33% along with realized gains of 4.5 +/- 0.15 dBi, throughout that bandwidth. Analyses of the current distributions are used to explain the contributions of the parasitic patch, and further simulation studies validate our design guidelines and show its advantages.