scholarly journals Design of Multi-Mode Antenna Array for Use in Next-Generation Mobile Handsets

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2447
Author(s):  
Naser Ojaroudi Parchin ◽  
Haleh Jahanbakhsh Basherlou ◽  
Raed A. Abd-Alhameed
Keyword(s):  
Antenna Array ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Antenna System ◽  
Cellular Systems ◽  
Good Efficiency ◽  
Mimo Antenna ◽  
Fifth Generation ◽  
Input Multiple Output ◽  
Multi Mode

In this study, a new design of a tri-band multiple-input–multiple-output (MIMO) antenna array is proposed for fifth-generation (5G) cellular systems. Its structure is composed of eight identical planar-inverted F antenna (PIFA) elements placed at different edge corners of the handset mainboard with overall dimensions of 150 × 75 mm2. The PIFA elements and ground plane of the MIMO antenna system are arranged on the back layer of the platform, which makes the design easy to integrate with the handset circuit. For S11 ≤ −10 dB, the radiation elements of the MIMO design operate at the frequency ranges of 2.5–2.7 GHz, 3.4–3.75 GHz, and 5.6–6 GHz covering the long-term evolution (LTE) 41, 42/43, and 47 operation bands, respectively. The array achieves better than 15 dB return loss results across the three operating bands. The presented antenna array not only exhibits multi-band operation but also generates the polarization diversity characteristic, which makes it suitable for multi-mode operation. The proposed antenna array was simulated and experimentally tested. Fundamental characteristics of the proposed design are investigated. It offers three band S-parameters with acceptable isolation and dual-polarized radiation with quite good efficiency and gain results. Besides this, the total active reflection coefficient (TARC) and envelope correlation coefficient (ECC) results of the PIFAs are very low over the bands. In addition, the radiation characteristics of the MIMO antenna in the presence of the user and handset components are studied. Moreover, a new and compact phased array millimeter-wave (MM-Wave) antenna with broad bandwidth and end-fire radiation is introduced which can be easily integrated into the smartphone antenna system. Due to its good performance and simple structures, the proposed smartphone antenna array design is a good candidate for future multi-mode 5G cellular applications.

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.

scholarly journals Mutual Coupling Reduction of DRA for MIMO Applications

2019 ◽  
Vol 8 (1) ◽  
pp. 75-81
Author(s):  
N. Al Shalaby ◽  
S. G. El-Sherbiny
Keyword(s):  
Mutual Coupling ◽  
Dielectric Material ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Antenna System ◽  
Parasitic Element ◽  
Mimo Antenna ◽  
Multiple Input ◽  
Input Multiple Output ◽  
Element Method

In this paper, A multiple input Multiple Output (MIMO) antenna using two Square Dielectric Resonators (SDRs) is introduced. The mutual coupling between the two SDRAs is reduced using two different methods; the first method is based on splitting a spiral slot in the ground plane, then filling the slot with dielectric material, "E.=2.2". The second method is based on inserting a copper parasitic element, having the same shape of the splitted Spiral, between the two SDRAs.  The effect of replacing the copper parasitic element with Carbon nanotubes (CNTs) parasitic element "SOC12 doped long-MWCNT BP" is also studied. The antenna system is designed to operate at 6 GHz. The analysis and simulations are carried out using finite element method (FEM). The defected ground plane method gives a maximum isolation of l8dB at element spacing of 30mm (0.6λo), whereas the parasitic element method gives a maximum isolation of 42.5dB at the same element spacing.

scholarly journals Wideband MIMO antenna for SCADA Wireless Communication Backhaul Application

2021 ◽  
Vol 12 (3) ◽  
pp. 4538-4547
Author(s):  
Nur Zafirah Bt Muhammad Zubir Et.al
Keyword(s):  
Wireless Communication ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Radiation Characteristic ◽  
Antenna System ◽  
Mobile Telecommunication ◽  
Telecommunication System ◽  
Antenna Structure ◽  
Mimo Antenna ◽  
Input Multiple Output

A wideband multiple-input-multiple-output (MIMO) antenna system with common elements suitable for SCADA wireless communication backhaul application which is operating frequency of 0.85-2.6GHz that can cover global system for mobile communication (GSM) 900MHz and 1.8GHz, The Universal Mobile Telecommunication System (UMTS) 2GHz, Wi-Fi (2.4GHz) and Long Term Evolution (LTE) 2.6GHz is proposed. The proposed MIMO antenna system consists of four microstrip feedline with common radiating element and a frame shaped ground plane. A single port antenna also was designed and presented in this paper to show the process to design wideband MIMO antenna structure. The radiator of the MIMO antenna system is designed as the shape of modified rectangle with straight line at each corner to enhance the bandwidth frequency. To improve the isolation between ports, the ground plane is modified by inserting four L-slots in each corner to reduce mutual coupling. For an antenna efficiency of more than 60%, the simulated reflection coefficients are below -10dB for all ports at expected frequency. Simulated isolation is achieved greater than -10dB by using a modified ground plane. Also, a low envelope correlation coefficient (ECC) less than 0.1 and polarization diversity gain of about 10dB with the orthogonal mode of linear polarization and omnidirectional pattern during the analysis of the radiation characteristic are achieved. Therefore, the proposed design can be used for SCADA wireless communication backhaul application.

A wideband 4-port MIMO antenna supporting sub-6 GHz spectrum for 5G mobile terminals

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mohammad Ahmad Salamin ◽  
Niamat Hussain
Keyword(s):  
Mimo System ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Good Choice ◽  
Antenna Element ◽  
Mimo Antenna ◽  
Single Antenna ◽  
Fifth Generation ◽  
New Radio ◽  
Input Multiple Output

Abstract In this work, a unique wideband multiple-input multiple-output (MIMO) antenna for fifth-generation (5G) applications is introduced. Each antenna element in the MIMO system is formed using a modified parasitic ring. To improve the performance of the antenna, a rectangular-shaped region is etched into the opposite side of each element in the ground plane. The proposed MIMO antenna is designed on a commercially available FR-4 substrate, having total dimensions of 100 × 60 × 0.8 mm3. Most interestingly, the antenna has a measured bandwidth from 2.60 to 5.97 GHz. This will effectively encompass the most predicted feasible bands for futuristic 5G communications, including 5G new radio frequency bands (N77/N78/N79) and long-term evolution (LTE) 46 band. The performance of a single antenna is evaluated in terms of S-parameters, gain, radiation patterns and efficiency. The performance of the MIMO system is also evaluated in terms of the envelope correlation coefficient (ECC) and diversity gain (DG). The designed antenna is fabricated, and the simulation results are verified practically. Good agreement is reached between simulation and measurement results. The proposed design is a good choice for 5G applications that require wideband capabilities.

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 MUTUAL COUPLING EFFECT ON MIMO ANTENNA

2014 ◽  
pp. 247-250
Author(s):  
BHUSHAN R. KALAMKAR ◽  
SACHIN S. KHADE ◽  
B.L. BADJATE
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Mimo Systems ◽  
Coupling Effect ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Correlation Coefficients ◽  
Mimo Antenna ◽  
Input Multiple Output ◽  
Plate Antenna

To reduce mutual coupling effect on MIMO Antenna this paper presents the analysis of bent ground plane antennas for multiple-input-multiple-output (MIMO). First, the three plate antenna array patterns of the envelope correlation coefficients are proposed to evaluate the diversity performance of antennas in MIMO systems. Following this, a compact three-element suspended plate antenna array with a bent ground plane is presented. The diversity performance of the design is experimentally and numerically analysed.

scholarly journals CSRR Loaded 2x1 Triangular MIMO Antenna for LTE Band Operation

2017 ◽  
Vol 6 (3) ◽  
pp. 78 ◽  
Author(s):  
C. J. Malathi ◽  
D. Thiripurasundari
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Antenna System ◽  
Antenna Element ◽  
Single Element ◽  
Mimo Antenna ◽  
Antenna Miniaturization ◽  
Input Multiple Output

A 2´1 (two-element) multiple-input multiple-output (MIMO) patch antenna system is designed and fabricated for (2.43 – 2.57) GHz LTE band 7 operation. It uses comple-mentary split -ring resonator (CSRR) loading on its ground plane for antenna miniaturization. This reduces the single-element antenna size by 76%. The total board size of the proposed MIMO antenna system, including the GND plane is 50´50´0.8mm3, while the single-patch antenna element has a size of 18.5 ´16mm2. The antenna is fabricated and tested. Measured results are in good agreement with simulations. A minimum measured isolation of 10 dB is obtained given the close interelement spacing of 0.17λ.

scholarly journals MIMO­­­-CSRR Antenna for ISM Band Applications

2021 ◽  
Author(s):  
satish kumar ◽  
Gunasekaran Thangavel ◽  
Said Amer Salim Al Ismaili Ismaili ◽  
Balambigai Subramanian
Keyword(s):  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Split Ring Resonator ◽  
Antenna System ◽  
Antenna Element ◽  
Mimo Antenna ◽  
Ism Band ◽  
Complementary Split Ring Resonator ◽  
Single Antenna ◽  
Input Multiple Output

Abstract For the operation of 2.45GHz ISM band, a 2x2 Multiple Input Multiple Output (MIMO) antenna system is designed and fabricated. Complementary Split Ring Resonator (CSRR) is used in the MIMO patch and loaded on its ground plane to miniaturize the single antenna element. The single patch antenna element of 14x18 mm2 is fixed in a board of the Designed MIMO antennae system measuring 100x50x0.8 mm3. The antenna is tested by measuring radiation pattern, gain, VSWR, mutual coupling and return loss. The results of the Designed antenna systems are in good agreement with the simulations. In comparison to a conventional microstrip antenna, the Designed antenna achieves a 75% reduction in the resonant frequency.

A compact dual port UWB-MIMO/diversity antenna for indoor application

2017 ◽  
Vol 10 (3) ◽  
pp. 360-367 ◽  
Author(s):  
Sonika Priyadarsini Biswal ◽  
Sushrut Das
Keyword(s):  
Mimo System ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Open Circuit ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Good Prospect ◽  
Mimo Antenna ◽  
Radiating Element ◽  
Input Multiple Output

A compact printed quadrant shaped monopole antenna is introduced in this paper as a good prospect for ultra wideband- multiple-input multiple-output (UWB-MIMO) system. The proposed MIMO antenna comprises two perpendicularly oriented monopoles to employ polarization diversity. An open circuit folded stub is extended from the ground plane of each radiating element to enhance the impedance bandwidth satisfying the UWB criteria. Two ‘L’ shaped slots are further etched on the radiator to provide good isolation performance between two radiators. The desirable radiator performances and diversity performances are ensured by simulation and/or measurement of the reflection coefficient, radiation pattern, realized peak gain, envelope correlation coefficient (ECC), diversity gain, mean effective gain (MEG) ratio and channel capacity loss (CCL). Results indicate that the proposed antenna exhibits 2.9–11 GHz 10 dB return loss bandwidth, mutual coupling <−20 dB, ECC < 0.003, MEG ratio ≈ 1, and CCL < 0.038 Bpsec/Hz, making it a good candidate for UWB and MIMO diversity application.

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