Journal ArticleDOI
Left-handed compact MIMO antenna array based on wire spiral resonator for 5-GHz wireless applications
Abdulrahman S. M. Alqadami,Mohd Faizal Jamlos,Mohd Faizal Jamlos,Ping Jack Soh,Sharul Kamal Abdul Rahim,Adam Narbudowicz,Adam Narbudowicz +6 more
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TLDR
In this paper, a coplanar waveguide-fed multiple-input multiple-output antenna array based on the left-handed wire loaded spiral resonators (SR) is presented.Abstract:
A compact coplanar waveguide-fed multiple-input multiple-output antenna array based on the left-handed wire loaded spiral resonators (SR) is presented. The proposed antenna consists of a 2 × 2 wire SR with two symmetrical microstrip feed lines, each line exciting a 1 × 2 wire SR. Left-handed metamaterial unit cells are placed on its reverse side and arranged in a 2 × 3 array. A reflection coefficient of less than −16 dB and mutual coupling of less than −28 dB are achieved at 5.15 GHz WLAN band.read more
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Compact ACS-fed CRLH MIMO antenna for wireless applications
TL;DR: In this article, a compact asymmetric coplanar strip (ACS)-fed composite right-left-handed (CRLH) multiple-input-multiple-output (MIMO) antenna for multiband operation is introduced.
Journal ArticleDOI
Performance Analysis of Novel Multi-band Monopole Antenna for Various Broadband Wireless Applications
TL;DR: This study investigates a novel concept of using slot and Coplanar Waveguide fed antenna to obtain multiband operation using a compact antenna that includes a star monopole patch with a slit gap and a Star-shape slot as the radiating part and Dual Square shaped slots on the material as the ground plane.
Journal ArticleDOI
A CPW fed two and four element antenna with reduced mutual coupling between the antenna elements for wireless applications
TL;DR: In this paper, a CPW fed antenna is designed using FR4 substrate, using which two and four element antenna structures are developed, and the performance parameters are analyzed, wherein the envelope correlation coefficient (ECC) has to be less than 0.5, diversity gain nearer to 10dB in the operating bandwidth, mean effective gain (MEG) less than 3dB, channel capacity loss (CCL) less 0.4 bits/s/Hz and the isolation between the antenna elements well above 20dB.
Journal ArticleDOI
Low-Profile MIMO Antenna Arrays with Left-Handed Metamaterial Structures for Multiband Operation
TL;DR: In this article, a design of two low-profile multiple-input-multiple-output (MIMO) antenna arrays based on left-handed metamaterial (LHM) structures is proposed for multiband wireless applications.
References
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Journal ArticleDOI
Composite Medium with Simultaneously Negative Permeability and Permittivity
TL;DR: A composite medium, based on a periodic array of interspaced conducting nonmagnetic split ring resonators and continuous wires, that exhibits a frequency region in the microwave regime with simultaneously negative values of effective permeability and permittivity varepsilon(eff)(omega).
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Massive MIMO for next generation wireless systems
TL;DR: While massive MIMO renders many traditional research problems irrelevant, it uncovers entirely new problems that urgently need attention: the challenge of making many low-cost low-precision components that work effectively together, acquisition and synchronization for newly joined terminals, the exploitation of extra degrees of freedom provided by the excess of service antennas, reducing internal power consumption to achieve total energy efficiency reductions, and finding new deployment scenarios.
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An overview of MIMO communications - a key to gigabit wireless
TL;DR: An overview of MIMO wireless technology covering channel models, performance limits, coding, and transceiver design is provided, in principle, to meet the 1 Gb/s data rate requirement with a single-transmit single-receive antenna wireless system.
Journal ArticleDOI
Robust method to retrieve the constitutive effective parameters of metamaterials.
TL;DR: In this article, an improved method to retrieve the effective constitutive parameters (permittivity and permeability) of a slab of metamaterial from the measurement of S parameters is proposed.
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Microstrip antennas integrated with electromagnetic band-gap (EBG) structures: a low mutual coupling design for array applications
Fan Yang,Yahya Rahmat-Samii +1 more
TL;DR: In this paper, a mushroom-like E-plane coupled E-strip antenna array on a thick and high permittivity substrate has been analyzed using the finite-difference time-domain (FDTD) method.