Mutual coupling reduction between elements of UWB MIMO antenna using small size uniplanar EBG exhibiting multiple stop bands

Dabas, Tanvi; Gangwar, Deepak; Kanaujia, Binod Kumar; Gautam, Akash

doi:10.1016/j.aeue.2018.05.033

Cited by 85 publications

(51 citation statements)

References 28 publications

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“…The effect of mutual coupling severely degrades how the MIMO system performs, due to that, all the antenna elements have to be considered together as one aperture. In order to reduce the space and mutual coupling between the antenna elements, researchers have used various methods including the use of defected ground structure s(DGS) [8,9], neutralization lines [10] and electromagnetic band gap (EBG) structures [11,12]. Metamaterials have attracted much interest over the last few years, as they introduce interesting possibilities for how to improve antenna performance; they are used as a protective measure between two radiating elements 2 of 14 to control and limit propagation among antenna elements and to lower the electromagnetic interactions among them [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Characteristic Mode Analysis and Design of Wide Band MIMO Antenna Consisting of Metamaterial Unit Cell

2019

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This paper presents a full wave simulation and characteristic mode-based design of a multiple-input-multiple-output (MIMO) antenna at 5.8 GHz for wireless local area network applications. The driven analysis comprises two antennas that are placed orthogonal to each other. A metamaterial unit structure in the form of a rectangular loop resonator is placed around the antenna element to reduce the electromagnetic interference and to increase the isolation between the two monopoles. A characteristic mode technique is employed to find out the dominant mode of the proposed antenna without a feeding port. It was revealed that mode 1 was the dominant mode among the three modes used. The MIMO antenna is constructed and measured using a vector network analyzer. A good isolation of less than 25 dB was attained with a wide impedance bandwidth of 65.5%.

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Section: Introductionmentioning

confidence: 99%

Characteristic Mode Analysis and Design of Wide Band MIMO Antenna Consisting of Metamaterial Unit Cell

2019

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“…EBGs performance is defined and analyzed on the basis of the photonic band gap surfaces in periodic structures . Due to the distinct and appealing features, EBG structures are utilized at different applications . Based on the electromagnetic theories, it is well known that the image current of a perfect magnetic conductor (PMC) is in parallel and in‐phase with the original current.…”

Section: Introductionmentioning

confidence: 99%

“…1 Due to the distinct and appealing features, EBG structures are utilized at different applications. [2][3][4][5][6] Based on the electromagnetic theories, it is well known that the image current of a perfect magnetic conductor (PMC) is in parallel and in-phase with the original current. Artificial magnetic conductor (AMC) surfaces act as a PMC with in-phase reflection coefficient over the given frequency band.…”

Section: Introductionmentioning

confidence: 99%

Comparative investigation of reflection and band gap properties of finite periodic wideband artificial magnetic conductor surfaces for microwave circuits applications in X‐band

Malekpoor

2019

Int J RF Microw Comput Aided Eng

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In this study, novel designs of artificial magnetic conductors (AMCs) for wideband operation are introduced. By using two techniques of the planar parasitic patches and stacked elements, AMC unit cells are achieved. The first design of the AMC unit cell is composed of four symmetric patches with two arms, which are coupled to a rhombic patch at the center. The second AMC design is configured of two stacked patches, which are connected together through the air spacing. The first and second AMC designs operate at the frequencies of 10.15 and 10.65 GHz with ±90° reflection phase bandwidths of 8 to 12.38 GHz (43.15%) and 8 to 12.90 GHz (46%), respectively, for X‐band operation. The proposed AMC unit cells present prominent features such as symmetric structures and wide bandwidths with distinct capabilities. To achieve an accurate evaluation of AMC performance, the reflection and band gap properties of the finite periodic AMC surfaces are investigated. The finite periodic arrays of the AMC reflectors are implemented and tested. The measured results show that they can be applied for wideband applications in microwave circuits and low profile antennas. The 15 × 15 AMC planar and stacked arrays under normal incidence operate at the frequencies of 9.89 and 10.25 GHz with the measured bandwidths of 7.85 to 12.02 GHz and 7.77 to 12.58 GHz, respectively. In addition, to identify the band gap properties of the finite periodic planar and stacked AMC arrays, the method of the suspended microstrip line is applied. For this purpose, the measured band gaps of the planar and stacked arrays include the ranges of 8.12 to 12.63 GHz and 7.81 to 12.10 GHz below −20 dB, respectively.

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“…However, neutralization-line [9,10] has been used to improve the isolation between two-monopole-antenna system. There are still other methods to achieve a better isolation by using metalized via wall [11], electromagnetic band-gap (EBG) structure [12][13][14], etching slots in the ground plane [15,16], and ELC resonator [17].…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Dual-Band Mimo Antenna With Low Mutual Coupling for Wireless Applications

Ouahabi¹,

Zakriti²,

Essaaidi³

et al. 2019

PIER C

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In this article, a parasitic element structure is proposed to reduce the mutual coupling in a miniaturized microstrip dual-band Multiple-Input Multiple-Output (MIMO) antenna, which resonates at (7.8 GHz) for X-band and at (14.2 GHz) for Ku band applications. The design of the primary antenna consists of two identical radiators placed on a 24 × 20 mm 2 Fr-4 substrate, which are excited by orthogonal microstrip feed lines. In addition, a single complementary split ring resonator (S-CSRR) is used to improve the performance of proposed antenna. Simulation and measurement were used to study the antenna performance, including reflection coefficients, coupling between the two input ports, radiation efficiency, and the radiation pattern. The measured results show that the proposed antenna achieves two operating bands with impedance bandwidths (|S 11 | ≤ −10 dB) of 560 MHz (7.6 to 8.16 GHz) and 600 MHz (13.8 to 14.4 GHz) and mutual coupling (|S 12 | < −26 dB), which are suitable for X/Ku band applications.

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Mutual coupling reduction between elements of UWB MIMO antenna using small size uniplanar EBG exhibiting multiple stop bands

Cited by 85 publications

References 28 publications

Characteristic Mode Analysis and Design of Wide Band MIMO Antenna Consisting of Metamaterial Unit Cell

Characteristic Mode Analysis and Design of Wide Band MIMO Antenna Consisting of Metamaterial Unit Cell

Comparative investigation of reflection and band gap properties of finite periodic wideband artificial magnetic conductor surfaces for microwave circuits applications in X‐band

A Miniaturized Dual-Band Mimo Antenna With Low Mutual Coupling for Wireless Applications

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