scholarly journals 2 × 2 MIMO Asymmetric U-Shaped Nonuniform Slot Antenna for the 4G LTE Metal-Housing Mobile Handsets

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
I-Fong Chen ◽  
Chia-Mei Peng ◽  
Jing-Jing Bao ◽  
Chia-Ching Chen
Keyword(s):  
Correlation Coefficient ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Polarization Diversity ◽  
Mimo Antenna ◽  
Operating Band ◽  
Term Evolution ◽  
4G Lte ◽  
Mobile Handset

A 2 × 2 MIMO antenna for metal-housing mobile handset application is proposed in this article. The polarization diversity is used to arrange the two antennas’ setup. The asymmetric U-shaped nonuniform slot antenna provides two different resonant bands are designed to be operated in long term evolution (LTE) covers lower band (698 MHz to 960 MHz) and upper band (1710 MHz to 2700 MHz). The modified type III balun is used for upper-operating band, and the open stub is used for lower-operating band, good impedance bandwidth, and radiated pattern and efficiency are shown. The isolation (S21) between the antennas is more than 20 dB, and the envelope correlation coefficient (ECC) is less than 0.02. A prototype of the proposed antenna chiselling in the metal-housing mobile handset (with 160 mm in length, 10 mm in height, and 70 mm in width) is fabricated and experimentally studied.

scholarly journals Design of a MIMO Antenna with Improved Isolation Using MNG Metamaterial

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Youngki Lee ◽  
Deukhyeon Ga ◽  
Jaehoon Choi
Keyword(s):  
Correlation Coefficient ◽  
Return Loss ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Impedance Bandwidth ◽  
Negative Permeability ◽  
Split Ring ◽  
Mimo Antenna ◽  
Term Evolution

A multi-input multi-output (MIMO) antenna with improved isolation using an interdigital split ring resonator (SRR) is proposed. The necessary impedance bandwidth is obtained by utilizing the coupling between the meander strip and an invertedLstrip. Using interdigital SRR, a negative permeability was generated, while achieving improved isolation between the two radiating elements. The fabricated antenna satisfies the 10 dB return loss in the long-term evolution (LTE) band 40 from 2.3 GHz to 2.4 GHz. The measured peak gains of the two elements were 2.0 dBi and 1.3 dBi. The measured envelope correlation coefficient was less than 0.16 over the frequency band of interest.

Dual-Port MIMO Rectangular Dielectric Resonator Antenna for 4G-LTE Application

2015 ◽  
Vol 781 ◽  
pp. 24-27 ◽  
Author(s):  
Raghuraman Selvaraju ◽  
Muhammad Ramlee Kamarudin ◽  
Mohsen Khalily ◽  
Mohd Haizal Jamaluddin ◽  
Jamal Nasir
Keyword(s):  
Dielectric Resonator ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Feed Line ◽  
Term Evolution ◽  
4G Lte ◽  
Rectangular Dielectric Resonator Antenna ◽  
Microstrip Feed Line ◽  
Microstrip Feed

A Multi Input Multi Output (MIMO) Rectangular Dielectric Resonator Antenna (RDRA) for 1.8 GHz Long Term Evolution (LTE) applications is investigated and presented. The antenna consisting of two rectangular dielectric resonator elements, both resonators are fed by microstrip feed line is etched on FR4 substrate. The simulated impedance bandwidth for port1 and port2 is 26.38% (1.6176-2.1093 GHz) and 26.80% (1.6146-2.1143GHz) respectively for |S11| ≤ -6dB, which can operate on LTE band 1-4,9,10,35-37 and 39. The gain of the MIMO RDRA is 3.2 dBi and 3.1 dBi at 1.8 GHz for port 1and port 2, respectively. The S-parameters, isolation, gain, and MIMO performance such as correlation coefficient and diversity gain of the presented RDR Antenna have been studied.

scholarly journals A Compact MIMO Antenna with Inverted C-Shaped Ground Branches for Mobile Terminals

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Zixian Yang ◽  
Hongchun Yang ◽  
Haijuan Cui
Keyword(s):  
Correlation Coefficient ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Planar Antenna ◽  
Mobile Terminals ◽  
Mimo Antenna ◽  
High Isolation ◽  
Operating Band ◽  
Measured Radiation ◽  
Envelope Correlation

A compact printed MIMO antenna for mobile terminals is presented. With two planar antenna elements, the −6 dB impedance bandwidth of 2.32 GHz (1.48–3.8 GHz) is obtained, which covers GSM 1800/1900, UMTS, WLAN, Wimax, S-band, and most of LTE bands. Each antenna element with a small occupation of 15 × 20 mm2consists of a driven strip and a shorted strip. Two inverted C-shaped ground branches are introduced between two elements to improve the isolation. The simulated results are studied and the measured results show that high isolation of more than 18 dB at the entire operating band is achieved. Meanwhile, the impedance performance is also improved by adding the branches. Furthermore, the measured radiation performances and envelope correlation coefficient also demonstrate that the proposed antenna could be a good candidate for mobile terminals.

scholarly journals Design of a Compact MIMO Antenna Using Coupled Feed for LTE Mobile Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Xing Zhao ◽  
Youngki Lee ◽  
Jaehoon Choi
Keyword(s):  
Correlation Coefficient ◽  
Mobile Applications ◽  
Return Loss ◽  
Impedance Matching ◽  
Antenna Element ◽  
Mimo Antenna ◽  
First Order ◽  
Term Evolution ◽  
Radiating Element

A compact multi-input multi-output (MIMO) antenna with a coupled feed structure for 4th generation (4G) handsets is proposed for operation in long-term evolution (LTE) band 13 (0.746 GHz–0.787 GHz). The MIMO antenna consists of two symmetrically distributed identical antenna elements. The size of each element is limited to 20 mm × 10 mm × 5 mm (λ0=392 mm at 0.765 GHz), and the separation between different elements is minimized to 15 mm. Each antenna element contains a Z-shaped coupled feed strip and a simple folded monopole-type radiating element. The simple folded radiating element supports two monopole modes (first order) excited at adjacent frequencies to achieve broadband performance. The coupled feed strip effectively modifies impedance matching and maintains good isolation. The proposed antenna has a 6 dB return loss bandwidth of 55 MHz (0.735 GHz–0.79 GHz) and isolation above 12 dB without the use of an additional isolation enhancement element. Moreover, the envelope correlation coefficient (ECC) is maintained below 0.5 over the designed frequency band.

Eight-Element Antenna Array for LTE 3.4–3.8 GHz Mobile Handset Applications

Frequenz ◽  
2017 ◽  
Vol 71 (5-6) ◽  
Author(s):  
Lingsheng Yang ◽  
Ming Ji ◽  
Biyu Cheng ◽  
Bo Ni
Keyword(s):  
Antenna Array ◽  
Multiple Input Multiple Output ◽  
Antenna System ◽  
Impedance Bandwidth ◽  
Mimo Antenna ◽  
Operating Band ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Mobile Handset

AbstractIn this letter, an eight-element Multiple-input multiple-output (MIMO) antenna system for LTE mobile handset applications is proposed. The antenna array consists of eight 3D inverted F-shaped antennas (3D-IFA), and the measured –10 dB impedance bandwidth is 3.2–3.9 GHz which can cover the LTE bands 42 and 43 (3.4–3.8 GHz). By controlling the rotation of the antenna elements, no less than 10 dB isolation between antenna elements can be obtained. After using the specially designed meandered slots on the ground as decoupling structures, the measured isolation can be further improved to higher than 13 dB between the antenna elements at the whole operating band.

scholarly journals New Configuration of Handset MIMO Antenna for LTE 700 Band Applications

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Byeonggwi Mun ◽  
Frances J. Harackiewicz ◽  
Byeongkwan Kim ◽  
Hyunho Wi ◽  
Jonghyun Lee ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Multiple Input Multiple Output ◽  
Optimum Location ◽  
Mimo Antenna ◽  
High Isolation ◽  
Term Evolution ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Additional Coupling

A compact handset multiple-input multiple-output (MIMO) antenna for long-term evolution (LTE) 700 band (746~787 MHz) applications is proposed. The proposed antenna consists of two symmetrical PIFAs. Without the usage of any additional coupling elements between closely mounted antennas, a high isolation (>15 dB) and a low enveloped correlation coefficient (ECC<0.35) are achieved by the optimum location and arrangement of MIMO antenna elements.

scholarly journals Design of a Compact UWB MIMO Antenna without Decoupling Structure

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Yanjie Wu ◽  
Kang Ding ◽  
Bing Zhang ◽  
Jianfeng Li ◽  
Duolong Wu ◽  
...  
Keyword(s):  
Impedance Matching ◽  
Multiple Input Multiple Output ◽  
Monopole Antenna ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Mimo Antenna ◽  
High Isolation ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Mobile Handset

A compact high isolation ultrawideband (UWB) multiple-input-multiple-output (MIMO) antenna is designed. The proposed MIMO antenna consists of a rectangular monopole antenna and a slot antenna fed by two microstrip lines, respectively. To improve the impedance matching, a circular coupling structure is designed to feed the tapered slot antenna. The parasitic resonance introduced by the ground stub helps to extend the impedance bandwidth of monopole antenna at the upper UWB band. Commonly used complex decoupling or coupling structures are eliminated that endow the proposed antenna minimized foot print, which is preferred in mobile handset. Although without decoupling structure, high isolation is obtained between two antenna elements. Simulation and measurement verify the antenna’s desirable performance, showing a broad impedance bandwidth of 3.1–10.6 GHz with |S11| < −10 dB and |S21| < −20 dB over 3.4–10.6 GHz, and |S21| < −18 dB from 3.1–3.4 GHz.

Simulación de cobertura del modelo de radio propagación 3GPP para un entorno urbano en una red 4G – LTE

2013 ◽  
Vol 8 (15) ◽  
pp. 33-40
Author(s):  
Javier Enrique Arévalo Peña
Keyword(s):  
Long Term Evolution ◽  
Term Evolution ◽  
Nuevas Tecnologías ◽  
4G Lte ◽  
3Rd Generation Partnership Project

En la planeación de las próximas generaciones de redes inalámbricas es importante contar con estudios de radio propagación que permitan establecer diseños adecuados para ofrecer los servicios proyectados por las nuevas tecnologías a los usuarios móviles. En este artículo se presentan aspectos relacionados con el comportamiento de cobertura de radio propagación del modelo propuesto por el 3GPP (3rd Generation Partnership Project) para un entorno urbano en una red LTE (Long Term Evolution) empleando sistemas de antenas convencionales y sistemas de antena adaptativas (AAS). Para ello se utiliza la herramienta de software ICS Designer y se establece como escenario los alrededores la Fundación Universidad Autónoma de Colombia ubicada en el centro urbano de la ciudad de Bogotá D. C.

Feasibility Design of 4G-LTE Cell Sites in an Academic Community

2015 ◽  
Vol 781 ◽  
pp. 3-6
Author(s):  
Sophonwit Somchai ◽  
Jirun Potinakkha ◽  
Nararat Ruangchaijatupon ◽  
V. Prasertchareonsuk ◽  
M. Leeprakobboon ◽  
...  
Keyword(s):  
Communication Technologies ◽  
Academic Community ◽  
Feasibility Analysis ◽  
Telecommunication System ◽  
Age And Gender ◽  
Term Evolution ◽  
Khon Kaen ◽  
And Gender ◽  
4G Lte

This paper shows the feasibility analysis of the 4th generation (4G) telecommunication system on 800-900 MHz spectrum. It applies the Long-Term Evolution (LTE) wireless communication and makes a feasibility design of cell site placement. An academic community is selected as a studied site because the high usage of advanced communication technologies. Due to the variety of population density, age, and gender, Khon Kaen University is chosen. This paper also suggests the model for cell site installation and cell site positions in Khon Kaen University area.

scholarly journals Data Distribution for Multiple Receivers in a Connected Car Environment Using 5G Communication

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Won-Bin Kim ◽  
Daehee Seo ◽  
Donghyun Kim ◽  
Im-Yeong Lee
Keyword(s):  
Legitimate User ◽  
Multiple Receivers ◽  
Term Evolution ◽  
New Radio ◽  
Point To Point ◽  
4G Lte ◽  
Encryption Method ◽  
Privacy Issues ◽  
The Internet Of Things

The development of communication technology has brought changes to various environments. The evolution from 3G to 4G Long-Term Evolution (LTE) was mainly aimed at improving communication speed. However, the evolution from 4G LTE to 5G New Radio (NR) is not aimed at improving speed alone. In addition to the existing communication types, 5G aims to improve communication to support the Internet of Things (IoT), media, and complex content to which things are connected. In such environments, point-to-point communication has a very inefficient structure to allow content providers to transmit data to many content users. In the 5G era, content providers must distribute content to numerous users, and in this process, they need to protect the content. Multireceiver encryption (MRE) is an encryption technology developed for this purpose. MRE allows multiple recipients to decrypt data using their own private key with single encryption of a data provider. With this technology, even if the number of data recipients is 100,000 or 1,000,000, data can be distributed with single encryption. Therefore, while using the existing 1 : 1 encryption method, it is possible to solve the problem of inefficiency in performing encryption for each recipient. However, existing proposed MREs can cause key escrow problems and partial key verification problems. Furthermore, the privacy issues identifying the recipient may arise because anonymity is not available to the recipient. In addition, it is necessary to ensure a fair decryption process for all recipients which a legitimate user cannot decrypt. In this study, we attempted to address these problems, and through our model, it is possible to distribute the data more securely and efficiently in a 5G environment.

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