A Compact Multi-Band MIMO Antenna with High Isolation for C and X Bands Using Defected Ground Structure

A Multiple Input Multiple Output (MIMO) antenna with high isolation is proposed in this paper. The proposed antenna includes two sets of four elements (2 x 2) and it is yielded at the central frequency of 5.5 GHz for Wireless Local Area Network (WLAN) applications. Based on RT5880 with height of 1.575 mm, the overall size of MIMO antenna is 140 x 76 x 1.575 mm3. To get high isolation between antenna elements, a Defected Ground Structure (DGS) is integrated on ground plane. Besides, the MIMO antenna witnesses a large bandwidth of 9.1% and an efficiency of 90% while the pick gain is 8.5 dBi. The measurement results are compared to simulation ones to verify the performance of the proposed antenna.

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Design Of Enhanced Bandwidth Of Dual Element MIMO Antenna For Wireless Applications

Turkish Journal of Computer and Mathematics Education (TURCOMAT) ◽

10.17762/turcomat.v12i6.2415 ◽

2021 ◽

Vol 12 (6) ◽

pp. 1030-1036

Author(s):

B Shruthi, Et. al.

Keyword(s):

Multiple Input Multiple Output ◽

Frequency Range ◽

Defected Ground Structure ◽

Ground Structure ◽

Broad Bandwidth ◽

Mimo Antenna ◽

Wireless Applications ◽

High Isolation ◽

Multiple Input ◽

Input Multiple Output

A multiple-input-multiple-output lightweight printed ultrawideband antenna among a dimension about 40×50mm2to minimise the coupling between these two antennas, the proposed antenna with a quarter circular radiating patch, with defected ground structure is designed. The antenna developed by MIMO is highly isolated, stronger than -15dB. In the working band, from 2.67GHz to 14GHz. The simulation indicates that the proposed MIMO antenna will balance the complete enhanced band with a broad bandwidth by making use of CST. It operates at 5.83GHz, 8.07GHz, 12.28GHz and bandwidth tends to cover the ultrawideband range. UWB band and high isolation, that assemblesit perfect for any application of wireless modules in the UWB range, in order to minimise coupling. For indoor applications and wireless applications these frequency range is used.

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A Microstrip MIMO Antenna with Enhanced Isolation for WiMAX Applications

Research and Development on Information and Communication Technology ◽

10.32913/mic-ict-research.v2019.n2.869 ◽

2019 ◽

Vol 2019 (2) ◽

pp. 99-105

Author(s):

Nguyễn Ngọc Lan ◽

Nguyễn Thị Thu Hằng ◽

Hồ Văn Cừu

Keyword(s):

Radiation Efficiency ◽

Defected Ground Structure ◽

Ground Structure ◽

High Radiation ◽

Central Frequency ◽

Mimo Antenna ◽

High Isolation ◽

Measurement Results ◽

Multiple Input ◽

Good Agreement

In this paper, a multiple-input multipleoutput (MIMO) antenna with high isolation is designed using defected ground structure (DGS). The proposed antenna is constructed by two sets of four elements (2×2), which are designed at the central frequency of 3.5 GHz for Worldwide Interoperability for Microwave Access (WiMAX) applications. The antenna is fabricated on a FR4 substrate with an overall size of 144 × 99 × 1.6 mm. Thanks to DGS, the designed MIMO antenna achieves a high isolation of 30 dB and a high radiation efficiency of over 90%. Besides, this MIMO antenna attains a 7.5 dBi gain. There is a good agreement between the simulated S-parameters and the measurement results.

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