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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Free space and user proximity analysis of octaband monopole MIMO/diversity antenna for modern handset applications
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Free space and user proximity analysis of octaband monopole MIMO/diversity antenna for modern handset applications

机译：适用于现代手机应用的八频带单极MIMO /分集天线的自由空间和用户接近度分析

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摘要

In this article, a comprehensive study of the compact octaband monopole MIMO/diversity antenna is carried out in the free space and user proximity. The radiating structure of the proposed antenna consists of a driven element which is directly fed with microstrip line and a parasitic element. However, the designed antenna provides of 730-885 MHz at lower frequency side and 1670-2740 MHz at higher frequency side. Further, to reduce the mutual coupling between two antenna elements, a folded T-shaped structure is designed of electrical length lambda/4 at 0.8 GHz and attached to the ground plane. This structure helps in isolation improvement up to the level of -12 dB from -6 dB. The folded structure of T-shaped provides compactness to the proposed antenna. Thereafter, three kinds of user proximity named as Talk mode, Data mode, and Read mode along with mobile phone are studied. Moreover, the specific absorption rate (SAR) is calculated and found well below the standard limit of FCC and European standard. Finally, the proposed antenna is fabricated and tested. The measured results are in close agreement with simulated results.
机译：在本文中，对自由空间和用户附近的紧凑八频带单极MIMO /分集天线进行了全面研究。所提出的天线的辐射结构由直接馈送有微带线的驱动元件和寄生元件组成。但是，设计的天线在较低频率侧提供730-885 MHz，在较高频率侧提供1670-2740 MHz。另外，为了减少两个天线元件之间的相互耦合，设计了折叠的T形结构，其在0.8GHz的电长度为λ/ 4，并附接到接地平面。这种结构有助于将隔离度从-6 dB提高到-12 dB。 T形的折叠结构为所建议的天线提供了紧凑性。此后，研究了与移动电话一起称为通话模式，数据模式和读取模式的三种用户接近度。此外，计算出的比吸收率（SAR）远低于FCC和欧洲标准的标准极限。最后，所提出的天线被制造和测试。测量结果与模拟结果非常吻合。

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