Compact two-element UWB fractal monopole MIMO antenna using T-shaped reflecting stub for high isolation

Rajkumar, S.; Selvan, Krishnasamy T.; Rao, P. H.

doi:10.1109/imarc.2015.7411437

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…It also uses a modified Minkowski fractal DGS to provide further isolation in between the antenna elements. The radiator of the monopole configuration antenna proposed in Rajkumar et al (2015) is fractal shaped and it is also fed by a CPW feed. The usage of T stub between antenna elements for coupling S 21 reduction.…”

Section: Introductionmentioning

confidence: 99%

“…Many techniques have been used in the literature for improving isolation. The techniques can be categorised into four broad approaches, namely, polarisation diversity (Taki and Abou-Rjeily, 2022; Adamiuk et al , 2009; Aboufoul et al , 2012; Osman et al , 2016; Peristerianos et al , 2016; Kaur et al , 2021; Sghaier and Latrach, 2021; Kim-Thi and Tran, 2021), quasi-self-complementary approach (Zhu et al , 2016; Khattak et al , 2021), pattern diversity (Tao and Feng, 2016; Divya et al , 2021; Dahl et al , 2017; Reddy et al , 2015; Sohi and Kaur, 2020) and usage of additional decoupling structures (Chacko et al , 2013; Xie et al , 2013; Chattha et al , 2013; Mao and Chu, 2014; MoradiKordalivand et al , 2014; Kang et al , 2015; Ramachandran et al , 2016; Chao-Ming et al , 2015; Bannered et al , 2017; Rajkumar et al , 2015; Deng et al , 2016; Li et al , 2013; Masoodi et al , 2020; Thakur et al , 2021; Abed et al , 2021; Singh et al , 2021; Kaboutari and Hosseini, 2021). We now provide a comprehensive review of some of these works.…”

Section: Introductionmentioning

confidence: 99%

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A monopole polarisation diversity antenna for high density packaging MIMO applications

K.M.¹,

Kavya²,

Rajkumar

2023

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Purpose This paper aims to propose a single element, dual feed, polarisation diversity antenna. The proposed antenna operates from 2.9 to 10.6 GHz for covering the entire ultra-wideband (UWB) frequency range. The antenna is designed for usage in massive multiple input multiple output (MIMO) and closed packaging applications. Design/methodology/approach The size of the antenna is 24 × 24 × 1.6 mm3. The radiating element of the antenna is derived from the Sierpinski–Knopp (SK) fractal geometry for miniaturization of the antenna size. The antenna has a single reflecting stub placed between the two orthogonal feeds, to improve isolation. Findings The proposed antenna system exhibits S11 < −10 dB, S21 < −15 dB and stable radiation characteristics in the entire operating region. It also offers an envelope correlation coefficient < 0.01, a diversity gain > 9.9 dB and a capacity loss < 0.4 bps/Hz. The simulated and measured outputs were compared and results were found to be in similarity. Originality/value The proposed UWB-MIMO antenna has significant size reduction through usage of SK fractal geometry for radiating element. The antenna uses a single radiating element with dual feed. The stub is between the antenna elements which provide a compact and miniaturized MIMO solution for high density packaging applications. The UWB-MIMO antenna provides an isolation better than −20 dB in the entire UWB operating band.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A monopole polarisation diversity antenna for high density packaging MIMO applications

K.M.¹,

Kavya²,

Rajkumar

2023

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“…However, as the distance between the antenna elements is small, the mutual coupling between the antenna elements is less than 17 dB. In [6], a fractal MIMO antenna is proposed with a T-shaped stub placed between the antenna elements to improve the isolation. The isolation obtained is greater than 15 dB, but the coupling between the antenna elements is higher in the lower frequency band.…”

Section: Introductionmentioning

confidence: 99%

A Penta-Band Reject Inside Cut Koch Fractal Hexagonal Monopole Uwb Mimo Antenna for Portable Devices

Rajesh¹

2018

PIER C

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In this paper, a novel compact hexagonal shaped ultra-wideband multiple-input multipleoutput (UWB-MIMO) Koch fractal antenna is designed with penta-band rejection characteristics for portable devices. The antenna rejects the C-band downlink frequency from 3.7-4 GHz, the C-band uplink frequency from 5.75-6.05 GHz and the satellite bands from 7.45 to 8.4 GHz. The band 7.45-7.55 GHz is used by the meteorological satellite service for the geostationary satellite services. The band 7.75-7.9 GHz is used by the meteorological satellite service for non-geostationary satellite services. The band 8. 025-8.4 GHz is used by the Earth exploration satellites for geostationary satellite services. The C-band and satellite bands interfere with the UWB and have been rejected using a band reject filter. A spiral shaped slot is introduced inside the fractal hexagonal monopole to introduce band reject characteristics. The band suppression and widening of the impedance bandwidth are achieved by using defected ground structures. The antenna has wideband impedance matching with S 11 < −10 dB in the UWB frequency range from 3.1 to 13.6 GHz and has a low mutual coupling with S 21 < −19 dB. The antenna has very low envelope correlation coefficient of less than 0.17 and low capacity loss of 0.254, which proves that the MIMO antenna shows good diversity performance.

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Fractal MIMO Antenna for Wireless Application

Khade

Bire

2019

Lecture Notes in Electrical Engineering

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Compact two-element UWB fractal monopole MIMO antenna using T-shaped reflecting stub for high isolation

Cited by 5 publications

References 12 publications

A monopole polarisation diversity antenna for high density packaging MIMO applications

A monopole polarisation diversity antenna for high density packaging MIMO applications

A Penta-Band Reject Inside Cut Koch Fractal Hexagonal Monopole Uwb Mimo Antenna for Portable Devices

Fractal MIMO Antenna for Wireless Application

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