A graphene‐based tunable miniaturized‐element frequency selective surface in terahertz band and its application in high‐isolation multiple‐input multiple‐output system

In MIMO(multiple input multiple output) system, antenna performance are degraded by mutual coupling hence to overcome this we go for circular polarization. In this paper we use planar, circularly polarized MIMO patch with three grounded stubs, F-shaped mirrored structure to achieve same time isolation &matching with offset feeding between two patches for circularly polarization.The elements of antenna are closely packed with 0.06λ0 of edge to edge distance at 2.5 GHZ frequency. The proposed antenna will results the impedance matching S11 < -10 dB and high isolation of S12 < -20 dB.

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Multi-user transmitter preprocessing assisted uplink multi-cell multiple-input multiple-output system with base station cooperation over frequency-selective channels

Computers & Electrical Engineering ◽

10.1016/j.compeleceng.2012.11.018 ◽

2013 ◽

Vol 39 (3) ◽

pp. 1016-1025 ◽

Cited By ~ 1

Author(s):

Prabagarane Nagaradjane ◽

Prasaanth Muralidharan ◽

Sabarish Karthik Vivek Sarathy ◽

Yuvika Ashwina Rajan ◽

Shriram Swaminathan

Keyword(s):

Multiple Input Multiple Output ◽

Base Station ◽

Base Station Cooperation ◽

Multiple Input ◽

Input Multiple Output ◽

Output System ◽

Frequency Selective ◽

Frequency Selective Channels

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A Graphene-Assembled Film Based MIMO Antenna Array with High Isolation for 5G Wireless Communication

Applied Sciences ◽

10.3390/app11052382 ◽

2021 ◽

Vol 11 (5) ◽

pp. 2382

Author(s):

Rongguo Song ◽

Xiaoxiao Chen ◽

Shaoqiu Jiang ◽

Zelong Hu ◽

Tianye Liu ◽

...

Keyword(s):

Antenna Array ◽

Antenna Arrays ◽

Multiple Input Multiple Output ◽

Frequency Selective Surface ◽

Antenna System ◽

Antenna Element ◽

Mimo Antenna ◽

High Isolation ◽

Input Multiple Output ◽

Alternative Material

With the development of 5G, Internet of Things, and smart home technologies, miniaturized and compact multi-antenna systems and multiple-input multiple-output (MIMO) antenna arrays have attracted increasing attention. Reducing the coupling between antenna elements is essential to improving the performance of such MIMO antenna system. In this work, we proposed a graphene-assembled, as an alternative material rather than metal, film-based MIMO antenna array with high isolation for 5G application. The isolation of the antenna element is improved by a graphene assembly film (GAF) frequency selective surface and isolation strip. It is shown that the GAF antenna element operated at 3.5 GHz has the realized gain of 2.87 dBi. The addition of the decoupling structure improves the isolation of the MIMO antenna array to more than 10 dB and corrects the antenna radiation pattern and operating frequency. The isolation between antenna elements with an interval of 0.4λ is above 25 dB. All experimental results show that the GAF antenna and decoupling structure are efficient devices for 5G mobile communication.

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