Meander-line electromagnetic bandgap structure for UWB MIMO antenna mutual coupling reduction in E-plane

Kumar, Niraj; Kiran, K. Usha

doi:10.1016/j.aeue.2020.153423

Cited by 44 publications

(18 citation statements)

References 25 publications

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“…Polarization orthogonal elements [11], Electromagnetic band-gap (EBG) structure [12], Meanderline EBG [13], neutralization line [14,15], stubs [16,17,18], parasitic elements [19,20], shorting pin [21], metamaterials with neutralization lines [22], [23], slots or carbon black film [24] have been presented in the literature. In [11], a MIMO system with two antenna elements that achieve orthogonal polarization with dimensions of 27 × 21 mm2 and an isolation level of 22.5 dB has been presented.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, a partial slotted EBG stub-ground is also included on an FR4 substrate with dimensions of 30 × 30 mm2. In [13], a meander-line EBG structure has been used for MC reduction between two antenna elements of size 32 × 64 mm2. In [14], a quad-port multi-polarized ultra-wideband (UWB) MIMO antenna system with a size 75.19 × 75.19 mm2 was isolated using neutralization ring (NR) structures.…”

Section: Introductionmentioning

confidence: 99%

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Quad-Port MIMO Filtenna With High Isolation Employing BPF With High Out-of-Band Rejection

2022

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A quad-port multiple-input multiple-output (MIMO) filtenna with compact dimensions of 50 × 50 mm2 are configured, in which each element is placed orthogonally to its adjacent to enhance the isolation. The MIMO element is configured based on the novel COVID-19 virus shape with a co-planar waveguide feeding structure (CPW) and dimensions 17 × 22 mm2. The element bandwidth is ranging from 3.3 GHz to more than 60 GHz. Three frequency notches are designed at 3.5 GHz for WiMAX and 5.5 GHz for WLAN, and 8.5 GHz for X-band applications. A bandpass filter (BPF) with high out of band rejection is used as a decoupling structure (DS) to improve the isolation to more than 30 dB across most of the bandwidth. The equivalent circuit model is scrutinized to investigate the enactment of the decoupling structure. The proposed MIMO filtenna system provides an impedance bandwidth of 2.4-18 GHz, a peak gain of 13.2 dBi, and an envelope correlation coefficient (ECC) less than 0.00021. In turn, channel capacity loss does not exceed 0.2. The MIMO filtenna is fabricated and measured. Good agreement between the measured and simulation results is achieved.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quad-Port MIMO Filtenna With High Isolation Employing BPF With High Out-of-Band Rejection

2022

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“…The coplanar waveguide (CPW) feed arrangement is one of the most suitable methods for achieving UWB performance 7,8 . In the large variety of UWB MIMO antenna designs available in the literature, 9–45 the intra‐element isolation is improved using many different techniques, including stubs between antenna elements, EBG (electromagnetic bandgap) structures, FSS (frequency selective surfaces), neutralization lines, DGS (defected ground structure), slotted edge substrate, and different decoupling structures. In the above‐discussed geometries, either the design dimensions are large compared to those of wireless devices, or their bandwidth is unable to cover the future wireless communication services beyond 14 GHz, or the MIMO parameter values are barely acceptable.…”

Section: Introductionmentioning

confidence: 99%

A double‐leaf‐shaped four‐port MIMO antenna for ultra‐wideband applications

Garg

Singhal

Nair

et al. 2022

Int J RF Mic Comp-Aid Eng

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A CPW-fed double-leaf-shaped ultra-wideband planar antenna, along with its four-port MIMO configuration, is presented. The MIMO element is designed through combining the techniques of a modified radiator, coplanar waveguide feeding arrangement, and defected ground structure. The size and operating bandwidth of the MIMO element are 14 Â 19 mm 2 and 3.73 GHz to 22.01 GHz, respectively. The MIMO element has a peak realized gain of 4.27 dBi and has stable radiation patterns at lower frequencies. In the MIMO configuration, four replicas of this MIMO element are orthogonally arranged to ensure polarization diversity. A rotated plus-shaped decoupling structure is integrated with the MIMO design for enhancing intra-element isolation. The proposed MIMO design offers an ultra-wide bandwidth of 18.28 GHz (3.73 GHz-22.01 GHz), an isolation value of more than 22 dB and an overall footprint of 40 Â 40 mm 2 . ECC < 0.03, CCL < 0.35, MEG < À4 dB, and TARC < À20 dB have been achieved. The MIMO design is fabricated and experimentally tested. The measured data is found to agree well with the simulated data. This antenna will be highly suitable for many ultra-wideband communication applications in today's world. K E Y W O R D Sdouble-leaf-shaped antenna, MIMO parameters, plus-shaped decoupling structure, polarization diversity, time-domain analysis, ultra-wide bandwidth | INTRODUCTIONThe wireless communication technology has witnessed significant developments during its transition from first-(limited to voice calls and limited data transfer) to fifthgeneration (HD video calling and high-speed gaming) systems. These systems require high data rates, improved reliability, low-power consumption, and higher channel capacity. Ultra-wideband (UWB) antenna systems (with an operational bandwidth of 3.1 GHz to 10.6 GHz allocated by FCC) can successfully meet these requirements.

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“…In [12,13,14,15], the antenna elements are placed in an orthogonal way, and polarization diversity technology is adopted to achieve natural isolation between antenna units. In addition, the isolation degree of antenna can be enhanced by introducing parasitic element [16,17,18,19], EBG structure [20] and decoupling network [21]. In this paper, we designed and fabricated a four cell MIMO antenna, where the unit isolation is realized by orthogonal layout, and its bandwidth meets the requirement of UWB.…”

Section: Introductionmentioning

confidence: 99%

A butterfly-like slot UWB antenna with WLAN band-notch characteristics for MIMO applications

Wang

Chen

et al. 2022

IEICE Electron. Express

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An ultra-wideband (UWB) antenna with butterfly-like coupling slot for 4-element multiple-input multiple-output (MIMO) applications is introduced in this letter. In the design of the UWB antenna unit, the proposed butterfly-like slot is adopted to improve the impedance matching and achieves the operating bandwidth of 3-12 GHz. At the same time, a symmetrical T-shaped meandering strip etched on the ground and connecting with the patch through via produces a notch at 5.1-5.37 GHz, which suppresses the signal interference in WLAN band simultaneously. The results show that the proposed antenna array consisting of four orthogonal elements realized good isolation of lower than −15 dB without any additional decoupled structures. Also, the proposed 2 × 2 MIMO design exhibited good diversity performance in terms of envelop correction coefficient (ECC<0.015), diversity gain (DG>9.92 dB). The gain reaches a maximum value of 6.8 dBi. Simulated and Measured results are in good accordance. All of this reveals the effectiveness of the proposed antenna in MIMO system and it can be suggested as a suitable candidate for UWB applications.

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Meander-line electromagnetic bandgap structure for UWB MIMO antenna mutual coupling reduction in E-plane

Cited by 44 publications

References 25 publications

Quad-Port MIMO Filtenna With High Isolation Employing BPF With High Out-of-Band Rejection

Quad-Port MIMO Filtenna With High Isolation Employing BPF With High Out-of-Band Rejection

A double‐leaf‐shaped four‐port MIMO antenna for ultra‐wideband applications

A butterfly-like slot UWB antenna with WLAN band-notch characteristics for MIMO applications

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