Mutual Coupling Reduction for UWB MIMO Antennas With a Wideband Neutralization Line

Zhang, Shuai; Pedersen, Gert Frølund

doi:10.1109/lawp.2015.2435992

Cited by 461 publications

(275 citation statements)

References 9 publications

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“…Various designs have been proposed in the recent years to suppress the effects of mutual coupling in UWB MIMO antennas [5][6][7][8][9][10], which are composed of using tree-like structure on the ground [5], placing radiators perpendicular to each other and adding two long protruding stubs to ground [6], adopting wideband neutralization line [7], introducing a T-shaped slot and line slot on the ground [8], using a modified ground structure along with a T-shaped slot on the ground [9], or adopting a Yshaped slot on the T-shaped protruded ground [10]. However, the antenna designs in [5][6][7][8][9][10] do not offer band-notch properties.…”

Section: Introductionmentioning

confidence: 99%

A Very Compact Mimo Antenna With Triple Band-Notch Function for Portable Uwb Systems

Jetti¹,

Nandanavanam²

2018

PIER C

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Abstract-A very compact triple band-notched multiple input multiple output antenna (MIMO) for ultra-wideband (UWB) communications is fabricated on an FR4 dielectric substrate having the overall size of 18 × 21 × 0.8 mm 3 . The proposed antenna consists of two rectangular metal monopoles which are excited by 50-Ω microstrip lines on top of a substrate, and a common protrude ground is at the bottom. To achieve low mutual coupling between radiating elements, a T-shaped stub is protruded from the ground plane. By etching two C-shaped slots on the radiating patches, band-notched functions at 5.15-6 GHz and 7.8-8.4 GHz are obtained. The third notch band from 3.3-3.7 GHz is realized by adding Ushaped metal strips to the ground. The measured and simulated results demonstrate that the proposed antenna offers good impedance bandwidth of |S 11 | ≤ −10 dB from 2.8-12.2 GHz covering whole UWB band except at the designed notch bands, while giving less mutual coupling (|S 21 |) of lower than −25 dB in the whole UWB band. The measured envelope correlation coefficient (ECC < 0.013), nearly constant gain and stable radiation patterns show that the proposed MIMO antenna is an appropriate candidate for portable UWB systems.

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Section: Introductionmentioning

confidence: 99%

A Very Compact Mimo Antenna With Triple Band-Notch Function for Portable Uwb Systems

Jetti¹,

Nandanavanam²

2018

PIER C

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“…Another way to improve the isolation between antenna units is to slot on the ground, as in Ref [4,5,6]. The other methods like introducing neutralization line [7,8] and distributing the units reasonable [9,10] are also available. However, these ways have a common shortcoming which is that they can decouple only for specific frequency band.…”

Section: Introductionmentioning

confidence: 99%

Novel Compact Four-port Ultra-wideband (UWB) MIMO Antenna Using Cross Structure

Sheng¹,

Li²,

Tan³

2018

dtcse

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Abstract.A printed microstrip-fed four-port ultra-wideband (UWB) MIMO antenna is proposed. Four UWB antenna units are placed perpendicular to each other. Cross structure resonator is loaded on the back of the antenna to achieve high isolation. The UWB frequency is created by the rectangular patch with slots between the feedline and the patch on the front of the antenna. The overall volume of the antenna is 36.5×36.5×1.6mm3 . The correlation coefficients of the antenna are less than 0.05 in the working frequency band. The isolation degree of each port is less than -15dB.The S parameters and the radiation patterns are measured and they are consistent with the simulation. The antenna can be applied to the UWB MIMO system.

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“…This inverted current is fed to the nearby antenna to reduce the amount of coupled current. NL can be a line or annular ring between the elements [27,28]. Two printed short circuited inverted-U shaped monopole-antennas of dimension 8 mm × 14.5 mm are placed on the opposite corners of the substrate with a spacing of 14 mm with a dimension of 13 mm × 14 mm for ground portion in between them [29].…”

Section: Introductionmentioning

confidence: 99%

Compact 2×1 Mimo Antenna System for Lte Band

Malathi¹,

Thiripurasundari²

2017

PIER C

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Abstract-A compact 2 × 1 multiple input multiple output (MIMO) antenna system is designed to operate in the LTE band 40 (2.3-2.4) GHz. The proposed antenna consists of two circular patches fed using microstrip line. The antenna was initially designed to resonate at 5 GHz. Size reduction of 55.17% compared to conventional patch antenna is obtained after the inclusion of circular complementary split ring resonator (CSRR) in the ground plane. The resonating frequency was shifted to 2.34 GHz, thereby the board size is compact (50 × 25 × 1.6 mm 3 ). The designed antenna covers a bandwidth of 2.3 to 2.374 GHz with a maximum return loss of −27 dB at 2.34 GHz and isolation of −33.5 dB between the ports. The simulated correlation coefficient is approximately zero, and the total active reflection coefficient is 0.142 at the resonating frequency which are within the acceptable limits. The realized gain for the antenna is −8.9 dB.

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Mutual Coupling Reduction for UWB MIMO Antennas With a Wideband Neutralization Line

Cited by 461 publications

References 9 publications

A Very Compact Mimo Antenna With Triple Band-Notch Function for Portable Uwb Systems

A Very Compact Mimo Antenna With Triple Band-Notch Function for Portable Uwb Systems

Novel Compact Four-port Ultra-wideband (UWB) MIMO Antenna Using Cross Structure

Compact 2×1 Mimo Antenna System for Lte Band

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