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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A miniaturized multi-wideband Quasi-Yagi MIMO antenna system
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A miniaturized multi-wideband Quasi-Yagi MIMO antenna system

机译：小型化的多宽带准八方MIMO天线系统

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摘要

A multi-band directional multiple-input–multiple-output (MIMO) antenna system isrnpresented based on a rectangular loop excited Quasi-Yagi configuration. A 64%rnreduction in size is obtained using a rectangular meandered element as well as a smallrnground plane. The proposed two-element MIMO antenna system covers the TelemetryrnL-band and several LTE/WLAN bands. It has a wide measured bandwidth of 689rnMHz (1.897–2.586 GHz) in the desired band centered at 2 GHz, and a measuredrnbandwidth of more than 168 MHz across rest of the bands. The MIMO antenna systemrnhas a total size of 45 × 120 × 0.76 mm~3, with a single element size of 55 × 60rn× 0.76 mm~3. The non-desired back-lobe radiation which is obtained using a smallrnground plane, is significantly reduced by using a novel defected ground structurern(DGS) as compared with the complex techniques present in literature. The proposedrnDGS provides a high measured front-to-back ratio of 14 dB at 2 GHz and 11 dB inrnother bands. A maximum measured realized gain of 5.8 dBi is obtained in the desiredrnband using a single parasitic director element. The proposed MIMO antenna systemrnhas a minimum measured radiation efficiency of 70%, isolation of 12 dB, andrnenvelope correlation coefficient of 0.098 within all bands which ensures very goodrnMIMO performance.
机译：提出了一种基于矩形环激励拟八木配置的多频带定向多输入多输出（MIMO）天线系统。使用矩形曲折元件以及较小的接地平面可使尺寸减小64％。拟议的两元素MIMO天线系统涵盖了TelemetryrnL频段和几个LTE / WLAN频段。在以2 GHz为中心的所需频带中，它具有689rnMHz（1.897–2.586 GHz）的较宽测量带宽，在其余频带中，其测量带宽均超过168 MHz。 MIMO天线系统的总尺寸为45×120×0.76 mm〜3，单个元件尺寸为55×60rn×0.76 mm〜3。与文献中存在的复杂技术相比，通过使用新型的缺陷地面结构（DGS），可以显着减少使用较小接地平面获得的非期望的后瓣辐射。所提出的rnDGS在2 GHz时提供了14 dB的高测得的前后比，而在其他频段则为11 dB。使用单个寄生指向矢元件，可以在所需频带中获得最大测得的实现增益5.8 dBi。所提出的MIMO天线系统在所有频带内的最低测得辐射效率为70％，隔离度为12 dB，包络相关系数为0.098，从而确保了非常好的MIMO性能。

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