| 摘要: |
| 提出了一种小型化高隔离MIMO吸顶天线设计方案。天线由水平极化印刷对数周期天线
环形阵列内嵌于垂直极化单锥天线组成，并通过在单锥天线上正对对数周期天线轴处各开一
个狭缝，实现了吸顶天线的全向辐射性能和双极化工作性能。嵌套结构的引入不仅大大减
小了双极化吸顶天线的结构尺寸，还实现了吸顶天线极化间的高隔离性能。采用HFSS对其进
行仿真和优化，得到该吸顶天线垂直极化工作频率为790～960 MHz/1 700～2 70
0
MHz，水平极化工作频率为2 300～2 700 MHz，同频隔离度优于44.5 dB，
并
且两个极化的增益和全向性均良好。该吸顶天线结构简单，便于加工制作，且成本较低，
具有较高的实用价值。 |
| 关键词: MIMO天线 吸顶天线 双极化天线 小型化 高隔离度 印刷对
数周期天线 |
| DOI： |
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| 基金项目: |
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| Design of a miniaturized ceiling-mounted MIMO antenna with high isolation |
| HUANG Cong,XUE Feng-zhang |
| () |
| Abstract: |
| A miniaturized ceilingmounted MIMO antenna with high iso
lation is proposed. The antenna is made up by embedding a horizontally polarized
circular array of four printed logperiodic antennas(PLPDAs) within a vertical
ly polar
i
zed monoconical antenna. And by opening four proper slits on the monoconica
l
antenna which exactly face to the axis of each logperiodic antenna, it gets om
n
idirectional patterns and good performances of dualpolarization. The introdu
ct
ion of a nested structure, not only greatly reduces the size of the structure, b
ut also achieves high isolation. Using HFSS the ceiling-mounted
antenna is modeled and simulated.The operating frequency band for
the vertically polarized part is 790～960 MHz/1 700～2 700 MHz, and
2 300
～2 700 MHz for the horizontal polarization, the polarization isolation is b
e
tter than
44.5 dB, and the radiation patterns are good for both polarizations. The struc
ture of the ceiling-mounted antenna is featured by simple structure, easy to man
ufacture, lower cost and high practical value. |
| Key words: MIMO antenna ceiling-mounted antenna dual-polarized antenna miniat
urized high isolation printed log-periodic antenna(PLPDA) |
《电讯技术》编辑部 