Compact and Closely Spaced Metamaterial MIMO Antenna With High Isolation for Wireless Applications

Abdalla, Mahmoud A.; Ibrahim, Ahmed A.

doi:10.1109/lawp.2013.2288338

Cited by 102 publications

(52 citation statements)

References 9 publications

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“…Also, as stated before, in the design of a compact MIMO antenna system, it is necessary to use antenna miniaturization techniques that keep the antenna design simple while maintaining the diversity performance as high as possible although the antenna elements are placed close to each other. So far, many miniaturization techniques for MIMO antenna systems have been investigated for ISM band operation, including 2.45-and/or 5-GHz ISM bands [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…The envelope correlation coefficient (ECC) less than 0.01 is obtained. A two-element MIMO metamaterial-based antenna was presented by Abdalla and Ibrahim [21] for 5.8 GHz WiMAX applications. A one left-handed metamaterial unit cell and a simple defected ground structure between the two antenna elements, separated by only 1.8 mm are employed.…”

Section: Introductionmentioning

confidence: 99%

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Design of a Compact Orthogonal Broadband Printed Mimo Antennas for 5-GHZ Ism Band Operation

Naji¹

2015

PIER B

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Abstract-This paper presents a new design approach for compact orthogonal broadband printed multiple-input multiple-output (MIMO) antennas based on a coplanar waveguide (CPW)-fed hexagonalring monopole antenna (HRMA) element. The design procedure of the basic radiating element is initiated from a stripline (SL)-fed circular monopole antenna (CMA). Then various antennas involved in the design evolution process are introduced to attain a compact CPW-fed HRMA. This basic antenna element has a compact size of 13 × 10 mm 2 , 50% smaller than SL-fed CMA, and a prototype of this antenna is built and tested. Based on HRMA element, compact two-and four-element MIMO antenna systems are designed, fabricated and experimentally demonstrated for 5-GHz ISM band operation. The MIMO antenna systems use orthogonally configured of identical closely spaced HRMA elements, with CPW-fed printed on one side of the substrate to achieve good isolation. Design simulation is carried out with the aid of Computer Simulation Technology Microwave Studio (CST MWS) and confirmed with High Frequency Structure Simulator (HFSS). The experimental results are in close agreement with the simulated ones, which validates the design principle. Based on experimental results, the two MIMO antenna systems have an impedance bandwidth of more than 2 GHz, good isolation of less than 15 dB, and a low envelope correlation coefficient of better than −26 dB across the frequency band of (4-6 GHz), which are suitable for 5-GHz MIMO applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of a Compact Orthogonal Broadband Printed Mimo Antennas for 5-GHZ Ism Band Operation

Naji¹

2015

PIER B

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“…Using these structures can decrease significantly the mutual coupling between antenna elements which is a huge challenge in MIMO system. However, there are many methods have been proposed to solve the mutual coupling such as using transmission line decoupling technique [1], neutralization line technique [2], covering antenna patch by additional dielectric layers [3], using shorting pins for cancellation of capacitive polarization currents of substrate [4], or using photonic band gap structures [5][6][7][8][9][10]. Among these techniques, photonic band gap structures such as defected ground structure (DGS) and EBG get much attention recently because their periodic structures not only can suppress surface wave in certain frequency bands called "stop-band" and subsequently reduce mutual coupling between microstrip antennas but also improve other antenna characteristics such as gain, bandwidth or efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…All of them have some benefits as well as drawbacks. The authors in [5] and [6] use simple rectangular DGS structures to reduce significantly mutual coupling but distance between antenna elements from feeding point to feeding point rather long. From [7] to [9], flexible shapes of EBG structure are designed.…”

Section: Introductionmentioning

confidence: 99%

Double-Side Electromagnetic Band Gap Structure for Improving Dual-Band MIMO Antenna Performance

Hoc

Yem

2017

REV J. Electron. Commun.

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Abstract-A double-side EBG (DS-EBG) structure with equivalent circuit model is proposed in this paper. Using double side structure with making H shape on both surfaces, the novel EBG can get much compact cell size of 8.6×8.6 mm 2 which is equal to 11.8 % the size of traditional EBG cell at the same of 2.6 GHz resonant frequency. Besides, the proposed DS-EBG structure also gets dual stop band that is able to decrease mutual coupling for dual-band antenna. Using 1×7 DS-EBG structures for dual-band MIMO system, several performance parameters of antenna are improved. Firstly, the mutual coupling between antenna elements gets -40 dB in the lower band and -30 dB in the higher one with narrow distance of 0.11 from feeding point to feeding point. Then, at 2.6 GHz, the antenna gain is increased significant by 160 % as well as radiation efficiency of antenna is better. This improvement is unable to get in previous EBG studies.

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“…Therefore, MIMO antennas receive a great deal of attention. A metamaterial-based MIMO antenna is proposed in [7], and good ports isolation performance is achieved by adopting defected ground structure. A dual-band MIMO antenna is reported in [8], and high port isolation is achieved by adopting transmission lines and etching slots.…”

Section: Introductionmentioning

confidence: 99%

A Compact Tri-band Printed Antenna for MIMO Applications

Zang¹,

Wang²

2015

RADIOENGINEERING

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Compact and Closely Spaced Metamaterial MIMO Antenna With High Isolation for Wireless Applications

Cited by 102 publications

References 9 publications

Design of a Compact Orthogonal Broadband Printed Mimo Antennas for 5-GHZ Ism Band Operation

Design of a Compact Orthogonal Broadband Printed Mimo Antennas for 5-GHZ Ism Band Operation

Double-Side Electromagnetic Band Gap Structure for Improving Dual-Band MIMO Antenna Performance

A Compact Tri-band Printed Antenna for MIMO Applications

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