Deployment of Modified Serpentine Structure for Mutual Coupling Reduction in MIMO Antennas

Arun, Henridass; Sarma, Aswathy K.; Kanagasabai, Malathi; Velan, Sangeetha; Raviteja, Chinnambeti; Alsath, M. Gulam Nabi

doi:10.1109/lawp.2014.2304541

Cited by 67 publications

(45 citation statements)

References 8 publications

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“…16 shows the measured approximated value of ECC based on the test procedure with a simple closed-form equation calculation using scattering parameters described in [20], which has been proved accurately and efficiently represents the performance of correlation of elements in the massive MIMO structure. It can be seen that physically further apart pair of elements has a smaller value of ECC, which means less correlated, while all of the tested pairs of elements have a very small value of ECC less than 0.002 over the whole operating frequency range, which is way lower than the industrial standard as 0.5 to obtain the diversity gain for the massive MIMO system [21], and even better than those narrow-band microstrip antennas utilizing decoupling technologies [22,23]. Based on the results shown above, the mutual coupling does not affect much on the VSWRs and port-to-port isolation of the different elements in different locations in the LSA array, meanwhile the elements are well decorrelated in the proposed massive MIMO array, even though the element spacing is very small, which proves the proposed Antenna D as a better candidate for the small spacing LSA application than the traditional antenna elements, which could suffer from a significant degradation on the isolation and array performance when the element spacing is very small.…”

Section: × 4 Array Prototype Of Lsamentioning

confidence: 90%

A Scalable Compact Wideband Dual-Polarized Printed Dipole Antenna for Base Station Applications

Tang¹,

Cao²,

Ho³

2017

PIER C

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Abstract-A novel compact wideband dual-polarized printed dipole antenna for base station application is presented. The proposed antenna is composed of four assembled substrates. Two pairs of identical arrow-shaped conductive lines on the tophat substrate form two orthogonal polarized dipoles. Two baluns connected with 50 Ω coaxial cables are integrated on another two vertical substrates to excite the dipoles. The other horizontal board at bottom provides grounding. A rectangular boxshaped reflector is also used to enhance its stability in radiation patterns over the operating frequencies. It achieves 22% size reduction from the conventional printed half-wavelength cross-dipole, and 43.2% impedance bandwidth (VSWR < 2), while maintaining a stable radiation pattern with measured CrossPolarization Degradation (XPD) better than −22 dB at boresight and an average peak gain of 8.4 dBi for a 65 • Azimuth Beamwidth base station application at 700/800/900 MHz bands. With the scalable miniature structure, it may also find itself suitable for side-by-side multiband Multi-Input Multi-Output (MIMO) or Large-Scale Antenna (LSA) 5G base station applications. A 4 × 4 array prototype of the LSA is also designed and fabricated, and it achieves 27.8% impedance bandwidth (VSWR < 1.5) with well decorrelated element performance and array XPD better than −20 dB across as large as 30 • tilting range.

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Section: × 4 Array Prototype Of Lsamentioning

confidence: 90%

A Scalable Compact Wideband Dual-Polarized Printed Dipole Antenna for Base Station Applications

Tang¹,

Cao²,

Ho³

2017

PIER C

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“…Then a neutralization line is utilized to reduce mutual coupling. Based on the same design steps, various decoupling structures were introduced for isolation enhancement, such as parasitic elements [8], defected ground structure [9], and metamaterial [10].…”

Section: Introductionmentioning

confidence: 99%

A compact planar UWB MIMO antenna using modified ground stub structure

Yin

Hong

Luo

et al. 2017

IEICE Electron. Express

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A novel UWB-MIMO antenna with high isolation is presented. The proposed antenna consists of two identical UWB elements. Each antenna element is evolved from the off-center-fed patch antenna and its operating frequency band covers the ultra-wideband. The modified ground, as part of the antenna radiator, can improve isolation by propagating through the restraining surface. In addition, the ground stub between the two elements, changes the surface current distribution, makes the surface current truncated and drawn, and obviously reduces the coupling between the ports, so that the antenna always has good isolation in the UWB. The miniaturized MIMO antenna with a size of only 30 × 40 mm 2 and measured mutual coupling lower than −18 dB, covers the 3.1-10.6 GHz UWB band, suitable for UWB wireless communication system.

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“…A two microstrip patch antenna array with slotted meander-line resonators for isolation enhancement is reported in [3]. In [4], a modified serpentine structure for mutual coupling reduction in MIMO antennas operating at 2.45 GHz ISM band applications is studied. The antenna elements used in [3,4] are both microstrip patch antennas.…”

Section: Introductionmentioning

confidence: 99%

“…In [4], a modified serpentine structure for mutual coupling reduction in MIMO antennas operating at 2.45 GHz ISM band applications is studied. The antenna elements used in [3,4] are both microstrip patch antennas. So the size is relatively large, and the bandwidth is narrow.…”

Section: Introductionmentioning

confidence: 99%

“…The system can be used for LTE 2300 and 2.45 GHz ISM band applications. Compared to the aforementioned systems [3][4][5][6][7][8][9], the proposed four-antenna system does not need any specially designed decoupling structures and has a higher than 15 dB isolation throughout the working band. Correlation coefficients and radiation pattern show that this antenna system is suitable for nowadays portable devices.…”

Section: Introductionmentioning

confidence: 99%

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Compact Printed Four-Element Mimo Antenna System for Lte/Ism Operations

Yang¹,

Su²,

Li³

2015

PIER Letters

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Abstract-A novel four-element multiple-input-multiple-output (MIMO) antenna system for LTE 2300 and 2.45 GHz ISM applications is presented. The total size of the proposed MIMO antenna system is 34 mm × 18 mm, and the whole antenna system has a wide working bandwidth of 350 MHz (2.19-2.54 GHz). The measured isolation between antenna elements is higher than 15 dB with a close edgeto-edge separation of 0.03λ. Correlation coefficient of the MIMO antenna system is lower than 0.12, which can meet the requirements of 4G wireless systems.

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Deployment of Modified Serpentine Structure for Mutual Coupling Reduction in MIMO Antennas

Cited by 67 publications

References 8 publications

A Scalable Compact Wideband Dual-Polarized Printed Dipole Antenna for Base Station Applications

A Scalable Compact Wideband Dual-Polarized Printed Dipole Antenna for Base Station Applications

A compact planar UWB MIMO antenna using modified ground stub structure

Compact Printed Four-Element Mimo Antenna System for Lte/Ism Operations

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