MIMO antenna system of two closely-positioned PIFAs with high isolation

2009 ◽  
Vol 45 (15) ◽  
pp. 771 ◽  
Author(s):  
S. Zhang ◽  
J. Xiong ◽  
S. He
Keyword(s):  
Antenna System ◽  
Mimo Antenna ◽  
High Isolation

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

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.

A Six-Port MIMO Antenna System With High Isolation for 5-GHz WLAN Access Points

2014 ◽  
Vol 13 ◽  
pp. 880-883 ◽  
Author(s):  
Wangwang Han ◽  
Xiaopeng Zhou ◽  
Jun Ouyang ◽  
Yan Li ◽  
Rui Long ◽  
...  
Keyword(s):  
Antenna System ◽  
Access Points ◽  
Mimo Antenna ◽  
High Isolation ◽  
5 Ghz

scholarly journals Isolation Improvement in UWB-MIMO Antenna System Using Slotted Stub

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1582
Author(s):  
Ahsan Altaf ◽  
Amjad Iqbal ◽  
Amor Smida ◽  
Jamel Smida ◽  
Ayman A. Althuwayb ◽  
...  
Keyword(s):  
Multiple Input Multiple Output ◽  
Equivalent Circuit Model ◽  
Wide Band ◽  
Antenna System ◽  
Circuit Model ◽  
Antenna Element ◽  
Performance Parameters ◽  
Mimo Antenna ◽  
High Isolation ◽  
Large Bandwidth

Multiple-input multiple-output (MIMO) scheme refers to the technology where more than one antenna is used for transmitting and receiving the information packets. It enhances the channel capacity without more power. The available space in the modern compact devices is limited and MIMO antenna elements need to be placed closely. The closely spaced antennas undergo an undesirable coupling, which deteriorates the antenna parameters. In this paper, an ultra wide-band (UWB) MIMO antenna system with an improved isolation is presented. The system has a wide bandwidth range from 2–13.7 GHz. The antenna elements are closely placed with an edge to edge distance of 3 mm. In addition to the UWB attribute of the system, the mutual coupling between the antennas is reduced by using slotted stub. The isolation is improved and is below −20 dB within the whole operating range. By introducing the decoupling network, the key performance parameters of the antenna are not affected. The system is designed on an inexpensive and easily available FR-4 substrate. To better understand the working of the proposed system, the equivalent circuit model is also presented. To model the proposed system accurately, different radiating modes and inter-mode coupling is considered and modeled. The EM model, circuit model, and the measured results are in good agreement. Different key performance parameters of the system and the antenna element such as envelope correlation coefficient (ECC), diversity gain, channel capcity loss (CCL) gain, radiation patterns, surface currents, and scattering parameters are presented. State-of-the-art comparison with the recent literature shows that the proposed antenna has minimal dimensions, a large bandwidth, an adequate gain value and a high isolation. It is worth noticeable that the proposed antenna has high isolation even the patches has low edge-to-edge gap (3 mm). Based on its good performance and compact dimensions, the proposed antenna is a suitable choice for high throughput compact UWB transceivers.

Aperture-coupling fed high isolation polarization diversity dual-element MIMO antenna system for WLAN application

2017 ◽  
Vol 59 (5) ◽  
pp. 1178-1182 ◽  
Author(s):  
Haixiong Li ◽  
Gaigai Zhang ◽  
Jiachen Xu ◽  
Jun Ding ◽  
Chenjiang Guo
Keyword(s):  
Antenna System ◽  
Polarization Diversity ◽  
Mimo Antenna ◽  
High Isolation ◽  
Aperture Coupling

Efficient and optimized six- port MIMO antenna system for 5G smartphones

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Kumar D. Rajesh ◽  
Babu G. Venkat
Keyword(s):  
Antenna Array ◽  
Channel Capacity ◽  
Specific Absorption Rate ◽  
Ground Plane ◽  
Antenna System ◽  
Impedance Bandwidth ◽  
Mimo Antenna ◽  
High Isolation ◽  
Capacity Loss ◽  
Four Corners

Abstract In this paper, six-port MIMO antenna is presented for 5G mobile handsets. The proposed six-port antenna array is designed by making four L shaped monopole slots at four corners and two at the middle side edges of the ground plane which is printed on the backside of 0.8 mm thick FR4 substrate. High isolation (>−18 dB) between any pair of antenna elements is achieved without deploying dedicated isolation enhancing mechanisms. The antenna is working from 3.4–3.6 GHz (LTE Band 42) with 200 MHz bandwidth in the 2:1 VSWR (−10 dB impedance bandwidth). The proposed six-port MIMO antenna array is fabricated and measured. Significant radiation efficiency is obtained from 70 to 74 % in desired band of operation. Further, the MIMO parameters such as Envelope Correlation Co-efficient (ECC), Channel Capacity, Channel Capacity Loss (CLL) and Total Active Reflection Co-Efficient (TARC) are calculated. The robustness of the antenna is estimated by analyzing the user hand effects and Specific Absorption Rate (SAR). The measured results are well agreed with the simulated results.

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