MIMO Multi Input Multi Output Anten.pptx

This PPT is about MIMO Antenna.

1. Under the Supervision of Prof. Dr. Jian Dong 天之痕 Design and Implementation of Ultrawide Band Multiple Input 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

2. ♔ ♖ ♗ ♘ ♙ ♜ ♛ 2 4 6 5 3 1 INTRODUCTION PROBLEM STATEMENT RESEARCH OBJECTIVES RESEARCH METHODOLOGY DATA FINDINGS & ANALYSIS CONCLUSION Contents ♗ 7 FUTURE RESEARCH

3. 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 transmission design that features two or more radiating patches. Many methods have been proposed to improve the isolation between the antenna components, and much research has concentrated on MIMO antenna systems.

4. Microstrips Antenna Talk about important Values & Beliefs Efforts to be Innovative & Creative, Seek different ideas to solve problems Pay attention to individual’s achievement Like Mentor or Coach 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.

5. Ultra Wideband (UWB) It is a wireless communication technology that uses low-power, short-range radio signals to transmit 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 Commission (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

6. 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 that 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 coverage of wireless communication.

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

8. Research Objective This research aims to propose a new, small, and effective UWB MIMO antenna design that may boost MIMO systems' efficiency in diverse wireless communication applications. It can achieve minimal mutual coupling and high diversity gain between the antenna components. 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.

9. Research Methodology Used HSFF

10. 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.

11. 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.

12. Bandwidth Characteristics The S-11 and S-22 simulated results of the MIMO antenna system with and without the circular-shaped structure. In which S-11(Return loss) is determined toward be less than be -10dB from 2.87 to 14.66 GHz. A planned antenna system's simulated S-11 and S-22.

13. 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.

14. 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 that 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.

15. 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. In this Figure the UWB antenna gain ranges from 2.5 to 14.5 GHz has shown.

16. 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.

17. 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 frequency range.

18. 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 throughout the whole UWB band.

19. 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.

20. 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.

21. Simulations Results and Discussions S11 is less than -10 dB (meaning that the reflected signal is at least 10 times smaller than the incident signal). When the DGS is added, the antenna's 10dB return loss which improves its working bandwidth by 75%, going from 4.4 GHz to 9.57 GHz.

22. 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.

23. 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.

24. Radiation Performance In this Radiation patterns are recorded with the other port terminated with a 50- load 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.

25. 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 change of 3 dB corresponds to a doubling or halving of power.

26. 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 successfully achieve Low mutual coupling, high diversity gains, a low-envelope correlation 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.

27. 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 and 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 capacity and dependability.

28. 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 coupling, several orientations might be attempted. To understand how the proposed antennas work, time domain characterization of the antennas may be done.

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