MIMO Multi Input Multi Output Anten.pptx

Under the Supervision of
Prof. Dr. Jian Dong 天之痕
Design and Implementation of Ultrawide Band Multiple In
put Multiple Output (MIMO) Antenna for Low Range
Applications
用于低距离应用的超宽带多输入多输出 (MIMO) 天线的
设计与实现
By:
Adnan Qurban 邱仲安
Student ID: 194718047

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INTRODUCTION
PROBLEM
STATEMENT
RESEARCH
OBJECTIVES
RESEARCH
METHODOLOGY
DATA FINDINGS &
ANALYSIS
CONCLUSION
Contents
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7 FUTURE
RESEARCH

Introduction
• The demand for compact wireless devices with high data rates has increased rapidly.
• Antenna systems have been proposed as a potential solution to enhance the performance of
wireless communication systems.
• MIMO antenna systems are being studied in this area for higher performance.
• MIMO approach is one of the most recent developments in intelligent antenna technology to
enhance communication performance.
• MIMO technology has been used by designers of microstrip antennas, which use the transmis
sion design that features two or more radiating patches.
• Many methods have been proposed to improve the isolation between the antenna compone
nts, and much research has concentrated on MIMO antenna systems.

Microstrips Antenna
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• It features a dielectric substrate with an etched feed line on one side, a ground plane
on the other, and a radiating patch on one side.
• The patch's shape is flexible and may yield the form of a square, rectangle, circle,
triangle, or ellipse.
• It radiate as a result of the fringe grounds that are present between the patch edge
and the ground plane.

Ultra Wideband (UWB)
• It is a wireless communication technology that uses low-power, short-range radio signals to tra
nsmit data over a broad frequency spectrum.
• Its frequency ranges from 3.1 to 10.6 GHz and can transmit data at rates up to several gigabits
per second.
• UWB technology is regulated by organizations such as the Federal Communications Commissio
n (FCC) in the United States.
• UWB technology has many potential applications in wireless communications, networking.
 Low Range High Data Rate Communications
 Location monitoring and low data rates

Multiple Input Multiple Output (MIMO)
• It is a wireless technology that uses multiple antennas to send and receive data simultaneously.
• It improve the speed and reliability of wireless communication by increasing the amount of data t
hat can be transmitted over the same frequency band.
• It also improve the signal quality of wireless communication by reducing interference.
• It often combined with beamforming techniques to further improve the signal quality and covera
ge of wireless communication.

Problem Statement
 This study consists of two radiating components with a circular form and Half Hex
agonal with DGS.
 This circular shape helps achieve high separation between the MIMO antenna parts.
 Whereas, Half Hexagonal improve impedance bandwidth and isolation.

Research Objective
• This research aims to propose a new, small, and effective UWB MIMO antenna design that m
ay boost MIMO systems' efficiency in diverse wireless communication applications.
• It can achieve minimal mutual coupling and high diversity gain between the antenna compon
ents.
• To access the performance to proposed antenna to different parameter i.e,
 S-parameters
 Radiation properties
 Peak gain
 Diversity gain
 Envelope correlation coefficient
 Multiplexing efficiency
• To provide insightful advice on building and enhancing UWB MIMO antennas, which may help
develop more effective and dependable wireless communication systems.

Research Methodology
• Used HSFF

A MINIATURE TWO-ELEMENT UWB MIMO ANTENNA
• In this we designed a circular form shape.
• With 1.6 mm thickness on a single FR4 substrate and 35 mm 50 mm footprint that is
being proposed covers the 4.4 to 10.7 GHz frequency.
• The isolation in the bulk of the UWB band is raised to -20 dB from the ground plane.

• This structures extend from the ground plane that prevent surface current from
travelling to the other radiator while one of the port supplying radiator is active,
that lowering the coupling between the radiators.
• In this circular construction and middle branch are inserted which improves the
isolation.

Bandwidth Characteristics
• The S-11 and S-22 simulated results of the MIMO antenna system with and with
out the circular-shaped structure.
• In which S-11(Return loss) is determined toward be less than be -10dB from 2.8
7 to 14.66 GHz.
A planned antenna system's
simulated S-11 and S-22.

Isolation Characteristics
• In this Figure the imitation effects of S-21 and S-12 is shown.
• Which shows S21 is less than -15 dB throughout the band.
• Better isolation of more than -17 dB and more than -20 dB.
• This result satisfies the condition that the mutual coupling between the antennas must
be less than -15 dB for the MIMO system to operate well in the UWB spectrum.

Radiations Patterns
• The radiation patterns frequency ranges from 4.4 to 10.7 GHZ
• In this the radiation pattern becomes more directed at frequencies between 5 and 7 GHz.
• In this the passage notes that the antenna system covers UWB frequencies which suggests th
at it can effectively transmit and receive signals across a wide range of frequencies.
• The radiation patterns were collected using one port, with the second port terminated at 50
percent load.
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Gain

Antenna Gain
• The structural symmetry ensures that both radiators have the same benefits.
• The graph shows a maximum gain of around 7.5 dBi at around 7 GHz and a minimum gain of
around 4.5 dBi at around 12 GHz.
• Over the UWB, there is just a 3 dBi difference in antenna gain.
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−8
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−4
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dB(GainTotal)
Frequency [GHz]
dB(GainTotal)
In this Figure the UWB antenna
gain ranges from 2.5 to 14.5 GHz
has shown.

Peak Gain
• This Figure proposed antenna's simulated peak gain.
• It suggest antenna's peak gain ranges from 4.4 dB to 14.5 dB and
changes linearly throughout the full UWB frequency range.
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dB(PeakGain)
Frequency [GHz]
dB(PeakGain)

Envelope Correlation Coefficient
• ECC value much smaller than the recommended maximum value of 0.5, with an ECC
value of less than 0.006.
• In this it shows that ECC value remains very low (0.006) across the entire UWB frequ
ency range.
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0.000
0.001
0.002
0.003
0.004
0.005
0.006
ECC
Frequency [GHz]
ECC

Diversity Analysis
• A Diversity gain is a crucial component of MIMO antenna performance (DG).
• This chart illustrates the diversity gain (DG>9 dB) of the recommended antenna thr
oughout the whole UWB band.
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9.99982
9.99984
9.99986
9.99988
9.99990
9.99992
9.99994
9.99996
9.99998
10.00000
10.00002
DG
Frequency [GHz]
DG

A DGS-ENABLED HALF-HEXAGONAL
MIMO ANTENNA SYSTEM
• In this we designed a Half Hexagonal form shape.
• With 1.6 mm thickness on a single FR4 substrate and 26 mm 31 mm footprint that is
being proposed covers the 4.4 to 10.7 GHz frequency.
• The isolation in the bulk of the UWB band is raised to -20 dB from the ground plane.

Proposed (DGS) Defected Ground
Structure
• In this DGS is added to increase bandwidth and lessen coupling between the antennas.
• On the ground level, a Half Hexagonal slit with a consistent width of Ws = 1 mm.
• The optimal separation between the triangle radiator and the Half Hexagonal DGS is 1.6
mm.

Simulations Results and Discussions
• S11 is less than -10 dB (meaning that the reflected signal is at least 10 times smalle
r than the incident signal).
• When the DGS is added, the antenna's 10dB return loss which improves its workin
g bandwidth by 75%, going from 4.4 GHz to 9.57 GHz.
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S-Parameters
(dB)
Frequency [GHz]
S11

• This focus on the simulation results for S-21 and S-12, which measure the amount of
signal transmitted from one antenna element to another.
• It shows S-21 is less than -15 dB.
• Whereas, the maximum amount of signal prevented from leaking from one antenna
element to another) is more than 20 dB.
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S-parameters
(dB)
Frequency [GHz]
S11
S21

Analyses Parametric
• In this figures the change in Return-loss value caused by increasing the slot Ws's
Width from 1 mm to 1.6 mm.
• Which shows higher bandwidth is maintained when a tiny Width, Ws=1mm.
• Whereas in other figure, after Ws is increased from 1mm to 1.6mm, which shows
better isolation performance.
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−40
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S-21
(dB)
Frequency GHz
Ws=1mm
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S-11(dB)
Frequency (GHz)
Ws=1mm

Radiation Performance
• In this Radiation patterns are recorded with the other port terminated with a 50- loa
d while just one of the ports is stimulated.
• The Figure depicts simulated at frequencies of 4.4 GHz in the YOZ (= 900) and XOZ (=
00) planes.
• Across the specified working band, the antenna displays a steady radiation behavior.
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Peak Gain
• The phrase "3 dB fluctuation" means a variation in the antenna gain of 3 decibels (
dB) across the spectrum.
• Decibels are a logarithmic unit used to measure the ratio of power levels, and a ch
ange of 3 dB corresponds to a doubling or halving of power.
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dB(PeakGain)
Frequency [GHz]
dB(PeakGain)

Conclusion
• MIMO antenna has a significant improvement over current wireless communication
systems.
• Circular shape make it perfect for many wireless communication systems that need
efficient MIMO systems.
• HFSS simulator's simulation results show how the suggested antenna design can suc
cessfully achieve Low mutual coupling, high diversity gains, a low-envelope correlati
on coefficient and high peak gain throughout the UWB frequency range.
• Circular structure performed well in terms of isolation which was superior to -17 dB.
• It shows bandwidth of the suggests antenna covers the whole UWB, from 4.4 to 10.
7 GHz.

Conclusion
• A Half Hexagonal-shaped DGS achieved the isolation of - 20 dB.
• The UWB is almost totally covered by the DGS’.
• Which increase bandwidth, and operates between 4.4 GHz to 9.57 GHz.
• The proposed compact antenna system with DGS is capable of wideband isolation an
d is suitable for portable MIMO applications.
• It is suggested that UWB MIMO antenna design with Low mutual coupling may have a
major impact on the creation of wireless communication systems with increased capa
city and dependability.

FUTURE RESEARCH
• This research may be expanded to include four-element MIMO antenna systems for
applications requiring high data rates and enhanced channel capacity.
• The diversity performance may be improved using reversible antenna components.
• The two radiators had similar shapes and directions. To further lessen the mutual c
oupling, several orientations might be attempted.
• To understand how the proposed antennas work, time domain characterization of t
he antennas may be done.

MIMO Multi Input Multi Output Anten.pptx

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