An <scp>l</scp>‐shaped 4‐element monopole MIMO antenna system with enhanced isolation for mobile applications

Ikram, Muhammad; Hussain, Rifaqat; Hammi, Oualid; Sharawi, Mohammad S.

doi:10.1002/mop.30104

Cited by 24 publications

(20 citation statements)

References 9 publications

(9 reference statements)

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“…Frequency reconfigurability is usually obtained using RF-switches, PIN diodes, varactor diodes, or MEMS switches. [4][5][6] In Ref. [7], a frequency reconfigurable ESA was designed.…”

Section: Orcidmentioning

confidence: 99%

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Compact planar multiband MIMO antenna based on composite right/left‐handed transmission line for mobile phone applications

Luo

Weng

Zhang

et al. 2018

Micro & Optical Tech Letters

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A novel compact planar multiband multiple‐input multiple‐out (MIMO) antenna based on composite right/left handed transmission line (CRLH‐TL) for mobile phone applications is presented in this article. The proposed MIMO antenna consists of two asymmetric antenna elements and two‐sided shorted ground, which is designed by zeroth‐order resonant theory to achieve compact performance. The proposed antenna elements cover the communication bands in 698–960 MHz and 1710–2690 MHz with the planar size of 16 × 56 mm2 and 12 × 56 mm2, respectively. Acceptable agreement between simulated and experimental results over the desired operating bands is observed. The envelop correlation coefficients are calculated by the S parameters.

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“…Frequency reconfigurability is usually obtained using RF-switches, PIN diodes, varactor diodes, or MEMS switches. [4][5][6] In Ref. [7], a frequency reconfigurable ESA was designed.…”

Section: Orcidmentioning

confidence: 99%

“…The wireless communication equipment has been developed rapidly at present. Multiple‐input multiple‐output (MIMO) technology is developed to satisfy the need of abundant communication rate, especially synchronous transmission. Consequently, there are a number of related researches on mobile phone applications with MIMO technology.…”

Section: Introductionmentioning

confidence: 99%

Compact planar multiband MIMO antenna based on composite right/left‐handed transmission line for mobile phone applications

Luo

Weng

Zhang

et al. 2018

Micro & Optical Tech Letters

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“…λ n is the eigenvalue, R and X represent the real and imaginary part of the impedance matrix. Two important parameters, the characteristic angle α [33] and the modal significance [34] are obtained with the eigenvalue. The resulted response of a given antenna can be express in terms of its characteristic modal response as:…”

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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“…Defected ground structures (DGS) were used to improve the isolation in Refs. . The idea of a dual function DGS (for isolation improvement and acting as a radiator) was first presented in Ref.…”

Section: Introductionmentioning

confidence: 99%

A multiband dual‐standard MIMO antenna system based on monopoles (4G) and connected slots (5G) for future smart phones

Ikram

Sharawi

Shamim

et al. 2018

Micro & Optical Tech Letters

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In this work, a 4G/5G multiple‐input multiple‐output (MIMO) antenna system is presented for smart phone applications. The 4G antenna operates from 1900 to 3212 MHz and 3517 to 3712 MHz with 1312 (69%) and 195 (5.5%) MHz measured bandwidths, respectively. The 5G antenna covers 25.7–30.50 GHz band with 4.8 GHz (18.7%) measured bandwidth. The 4G MIMO antenna system is based on 4‐element wideband monopoles, while the 5G one is based on 2‐element linear connected arrays (LCA). Four slots are etched to improve the isolation between the 4G MIMO antenna elements and then a 4 × 1 power divider/combiner is used to excite two of these slots to act as a LCA at mm‐waves. The concept of dual function ground slots is very useful to implement 4G and 5G MIMO antenna systems on the single substrate. The proposed design is fabricated on RO4350B substrate with a height of 0.76 mm and dielectric constant of 3.5. The overall size of the substrate is 115 × 65 × 0.76 mm3. The integrated wideband 4G/5G antenna system is a compact, low profile, and suitable for future smart phone applications. Isolation obtained was at least 15 dB and the envelope correlation coefficient (ECC) values did not exceed 0.16 between all elements.

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An l‐shaped 4‐element monopole MIMO antenna system with enhanced isolation for mobile applications

Cited by 24 publications

References 9 publications

Compact planar multiband MIMO antenna based on composite right/left‐handed transmission line for mobile phone applications

Compact planar multiband MIMO antenna based on composite right/left‐handed transmission line for mobile phone applications

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

A multiband dual‐standard MIMO antenna system based on monopoles (4G) and connected slots (5G) for future smart phones

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