quotation:		[Copy]
		[Copy]

This Paper:Browse 3532 Download 126
一种小型化高隔离MIMO吸顶天线
黄聪,薛锋章
0 Fontlarge +\|Default\|Small
(华南理工大学电子与信息学院，广州 510640)

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：

基金项目:

Design of a miniaturized ceiling-mounted MIMO antenna with high isolation

HUANG Cong,XUE Feng-zhang

()

Abstract:

A miniaturized ceilingmounted MIMO antenna with high iso lation is proposed. The antenna is made up by embedding a horizontally polarized circular array of four printed logperiodic antennas(PLPDAs) within a vertical ly polar i zed monoconical antenna. And by opening four proper slits on the monoconica l antenna which exactly face to the axis of each logperiodic antenna, it gets om n idirectional patterns and good performances of dualpolarization. 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)