Multiband MIMO antenna using a symmetric slotted structure for next generation USB dongle application

2011 IEEE MTT-S International Microwave Workshop Series on Intelligent Radio for Future Personal Terminals Pub Date : 2011-09-26 DOI:10.1109/IMWS2.2011.6027175

Jaehoon Choi, Minseok Han

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Abstract

A compact multiband MIMO antenna using a symmetric slotted structure is proposed for next generation USB dongle applications. The proposed MIMO antenna consists of two triple-band PIFAs with a symmetric slotted structure. The first resonance frequency is controlled by the total length of the main radiating strip with coupling slits (slit 1 and slit 2), which has a length of 70 mm (about 0.18 wavelengths at 0.77 GHz). The second one can be obtained by inserting on additional slit (slit 3) for WCDMA band. Moreover, the third resonance frequency can be tuned by the width of coupling slits (slit 1 and slit 2) and the position of the port 1 and 2 (P1 and P2) to cover M-WiMAX Band (2.5–2.69 GHz). To obtain a high isolation characteristic between two antennas, a symmetric slotted structure and the jointed shorting line are used to reduce the interaction between the two PIFAs. The proposed MIMO antenna has an isolation of approximately 15 dB and the envelope correlation coefficient (ECC) of the two antennas is less than 0.2 over the whole wanted frequency bands.

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多频段MIMO天线采用对称开槽结构，适用于下一代USB加密狗应用

针对新一代USB加密狗的应用，提出了一种采用对称开槽结构的紧凑型多频带MIMO天线。所提出的MIMO天线由两个具有对称开槽结构的三频带pifa组成。第一共振频率由具有耦合狭缝(狭缝1和狭缝2)的主辐射带的总长度控制，其长度为70 mm(约0.18波长，0.77 GHz)。第二个可通过插入用于WCDMA频带的附加狭缝(狭缝3)来获得。此外，第三共振频率可以通过耦合狭缝(狭缝1和狭缝2)的宽度和端口1和2 (P1和P2)的位置进行调谐，以覆盖M-WiMAX频段(2.5-2.69 GHz)。为了获得两根天线之间的高隔离特性，采用对称的开槽结构和连接的短线来减少两根pifa之间的相互作用。该MIMO天线的隔离度约为15 dB，在整个所需频带内，两根天线的包络相关系数(ECC)小于0.2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 IEEE MTT-S International Microwave Workshop Series on Intelligent Radio for Future Personal Terminals

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