MIMO antennas with diversity and mutual coupling reduction techniques: a review

Malviya, Leeladhar; Panigrahi, Rajib Kumar; Kartikeyan, M. V.

doi:10.1017/s1759078717000538

Cited by 131 publications

(73 citation statements)

References 142 publications

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“…The results presented in graph represent −10 dB bandwidth of 202 MHz with best combination of excitation angles of 45° and 45°. The TARC of the MIMO antenna can be evaluated by Equation (3)

Γ_{a}^{t} = \frac{\sqrt{{(||, S_{ii} + S_{ij} * e^{jθ})}^{2} + {(||, S_{ji} + S_{jj} * e^{jθ})}^{2}}}{\sqrt{N}} .

…”

Section: Resultsmentioning

confidence: 99%

Modified circular common element four-port multiple-input-multiple-output antenna using diagonal parasitic element

Chouhan

Panda

Kushwah

2018

Int J RF Microw Comput Aided Eng

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A four‐port multiple input multiple‐output (MIMO) antenna with common radiating element is proposed for 2.4 GHz Wi‐Fi applications. It comprises a modified circular radiator fed by four identical modified feedlines, partial ground planes, and a diagonal parasitic element (DPE). The parasitic element is used to enhance the interport isolation. The antenna has a 2:1 Voltage standing wave ratio (VSWR) impedance band 2.34‐2.56 GHz and nearly omnidirectional radiation patterns. The radiation efficiency is more than 79% and gain is 2 dBi at resonant 2.43 GHz. The isolation in the given frequency band is 10 dB. At the 2.43 GHz, the isolation between adjacent ports (1, 2 and 1, 4) is 14 dB and between opposite ports (1, 3) is 12 dB. The mean effective gain (MEG) ≤ −2.7 dB and envelope correlation coefficient is <0.01. The −10 dB total active reflection coefficient bandwidth is 202 MHz. The antenna is designed for a Wi‐Fi device and the effectiveness of antenna has been checked for distance of ½ feet from the human head. The specific absorption rate (SAR) is found to be ≤0.17 W/Kg by CST simulation tool.

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“…The results presented in graph represent −10 dB bandwidth of 202 MHz with best combination of excitation angles of 45° and 45°. The TARC of the MIMO antenna can be evaluated by Equation (3)

Γ_{a}^{t} = \frac{\sqrt{{(||, S_{ii} + S_{ij} * e^{jθ})}^{2} + {(||, S_{ji} + S_{jj} * e^{jθ})}^{2}}}{\sqrt{N}} .

…”

Section: Resultsmentioning

confidence: 99%

Modified circular common element four-port multiple-input-multiple-output antenna using diagonal parasitic element

Chouhan

Panda

Kushwah

2018

Int J RF Microw Comput Aided Eng

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“…So, S 11 or S 22 is not sufficient for characterizing the MIMO antenna performance. The term TARC is introduced to evaluate the MIMO antenna by considering the self and mutual impedances of both the antennas [28,29]. TARC mainly depends on return loss and the correlation between antenna elements [30].…”

Section: Diversity Performancementioning

confidence: 99%

Design and Parametric Analysis of Hexagonal Shaped Mimo Patch Antenna for S-Band, Wlan, Uwb and X-Band Applications

Addepalli¹,

Anitha²

2019

PIER C

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In this paper, a hexagonal-shaped multiple-input multiple-output (MIMO) patch antenna is presented. It covers the S band (2-4 GHz), WLAN (2400-2480, UWB (3.1-10.6 GHz), and X band (8-12 GHz) applications. The proposed structure is simulated and fabricated on an FR4 substrate with overall dimensions of 0.186λ 0 × 0.373λ 0 and separation of two patches with a distance of 0.053λ 0 (where λ 0 is the wavelength at 2 GHz). The single UWB patch is antenna derived from the triangular-shaped edge cuttings in the bottom of the rectangular patch antenna with a partial and defected ground. The proposed MIMO structure produces simulated results from 2 GHz to 13.3 GHz and measured results from 2.1 GHz to 12.9 GHz, with good agreement. The proposed structure resonates at 3.4 GHz, 5.8 GHz, 10.2 GHz, and 11.8 GHz. The isolation is improved to above 20 dB by placing an E-shaped tree structure and parasitic element in most of the band. The radiation efficiency and peak gain values are 78-94% and 1.4-6.6 dB, respectively. Diversity performance of the proposed structure is verified with low envelope correlation coefficient (ECC < 0.04), high diversity gain (DG > 9.985), and acceptable total active reflection coefficient (TARC < −10 dB) values.

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“…20 The various methods are used to reduce the mutual coupling are decoupling network, parasitic elements, defected ground plane, neutralization line, and so forth. [21][22][23][24] The existing methods can be grouped into the following categories:…”

Section: S Ola Ti On Te Chni Qu Esmentioning

confidence: 99%

Multiport MIMO antennas with mutual coupling reduction techniques for modern wireless transreceive operations: A review

Chouhan

Panda

Gupta

et al. 2017

Int J RF Microw Comput Aided Eng

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The present technology fulfills the requirement of high data rate and high channel capacity using multiple input multiple output (MIMO) technology. The MIMO capacity of the system is increased linearly but due to the multiple antennas placed near to each other, problem of mutual coupling exists, which degrades the maximum achievable performance of the system. The problems of multipath propagation can be solved using MIMO system. The isolation improvement methods decrease the mutual coupling among antenna elements, and improve the gain and efficiency of the system. In this paper, decoupling network isolation approach, parasitic element approach, defected ground structure, Neutralization line, isolation improvement based on metamaterials, isolation improvement using PIN diode, varactor diode, and feeding structure have been incorporated, and their merits and demerits have been discussed. The effect of different permittivity material on antenna parameters has also included.

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MIMO antennas with diversity and mutual coupling reduction techniques: a review

Cited by 131 publications

References 142 publications

Modified circular common element four-port multiple-input-multiple-output antenna using diagonal parasitic element

Modified circular common element four-port multiple-input-multiple-output antenna using diagonal parasitic element

Design and Parametric Analysis of Hexagonal Shaped Mimo Patch Antenna for S-Band, Wlan, Uwb and X-Band Applications

Multiport MIMO antennas with mutual coupling reduction techniques for modern wireless transreceive operations: A review

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