一种适用于无线应用的超宽带MIMO天线，具有高隔离性和低相关性

2017 IEEE International Conference on Antenna Innovations & Modern Technologies for Ground, Aircraft and Satellite Applications (iAIM) Pub Date : 2017-11-01 DOI:10.1109/IAIM.2017.8402534

R. Chithradevi, B. S. Sreeja

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引用次数: 17

摘要

提出了一种小型超宽带(UWB)多输入多输出单极天线。它由两个相同的半圆散热器和对称的阶梯椭圆结构组成。为了提高带宽，在接地面引入了弯i型缺陷地。所提出的MIMO天线实现了0.333 λ0 X 0.233 λ0的紧凑尺寸(λ0是第一个较低频率的波长)，UWB范围为1.99 -10.02 GHz，分数带宽为133.7%，覆盖Wi-Fi, Wi-MAX和WLAN应用。天线单元之间的单元间边沿间距为8.6 mm。它提供了良好的隔离，在1.99 GHz-4.5 GHz范围内优于13 dB，在4.5 GHz -10.02 GHz范围内优于22.5 dB，而无需任何额外的隔离元件。在该UWB MIMO天线中实现的最小相关小于0.0036。该天线具有良好的分集性能。它的峰值增益为8.18 dB，最大辐射效率为99.8%，稳定的辐射场几乎向全方向辐射。

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A compat UWB MIMO antenna with high isolation and low correlation for wireless applications

A compact Ultra Wide Band (UWB) Multiple Input Multiple Output (MIMO) monopole antenna is presented in this paper. It consists of two identical semi-circular radiators with symmetrical stepped elliptical structure. In order to enhance the bandwidth, curved-I shaped defective ground is introduced in the ground plane. The proposed MIMO antenna accomplish a compact size of 0.333 λ0 X 0.233 λ0 (λ0 is the wavelength at first lower frequency) and features a UWB ranges from 1.99 -10.02 GHz with a fractional bandwidth of 133.7 % covering Wi-Fi, Wi-MAX and WLAN applications. The inter-element edge-to-edge spacing between the antenna elements is 8.6 mm. It provides a good isolation of better than 13 dB over 1.99 GHz-4.5 GHz and 22.5 dB over 4.5 GHz -10.02 GHz without any additional isolating elements. The minimum correlation achieved in this proposed UWB MIMO antenna is < 0.0036. The proposed antenna offers a good diversity performance. Moreover, it offers a peak gain of 8.18 dB and maximum radiation efficiency of 99.8 % and the stable radiating fields are radiates in nearly omni direction.

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来源期刊

2017 IEEE International Conference on Antenna Innovations & Modern Technologies for Ground, Aircraft and Satellite Applications (iAIM)

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