Study and Reduction of the Mutual Coupling Between Two Mobile Phone PIFAs Operating in the DCS1800 and UMTS Bands

Diallo, Aliou; Luxey, Cyril; Thuc, Philippe Le; Staraj, Robert; Kossiavas, Georges

doi:10.1109/tap.2006.883981

Cited by 450 publications

(233 citation statements)

References 29 publications

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“…However, if the decoupling network is used, the power loss due to resistance in the decoupling connecting occurs and radiation efficiency decrease. Besides, there are also some decoupling methods of connecting only antennas without the decoupling network [5]. Nevertheless, it is hard to connect antennas in a wireless terminal with a large number of parts.…”

Section: Antenna Models and Decoupling Methodsmentioning

confidence: 99%

A decoupling method for MIMO antennas by using a short stub

2018

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Abstract:In recent years, MIMO technology which uses multiple antennas has been introduced in mobile terminal to increase communication capacity. However, if MIMO antennas are put closely, a strong mutual coupling occurred. Then it causes decreasing radiation efficiency and channel capacity. Therefore, reducing the mutual coupling is required. In previous study, connecting MIMO antennas by inductor L or added branch elements to antennas instead of L. In this paper, we propose a novel decoupling method by using a short stub and confirm that proposed model performed decoupling, increased radiation efficiency.

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Section: Antenna Models and Decoupling Methodsmentioning

confidence: 99%

A decoupling method for MIMO antennas by using a short stub

2018

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“…This issue has drawn great attention to the academia as well as many world leading companies. The solutions include metamaterial based decoupling [4][5][6][7], passive network based decoupling [8][9][10][11] and parasitic structures or elements decoupling [12,13]. This paper presents the design of a decoupling network formed by inverters and SRRs.…”

Section: Introductionmentioning

confidence: 99%

A Mimo Antenna Decoupling Network Composed of Inverters and Coupled Split Ring Resonators

Zhao¹,

Liu²,

Cai³

2017

PIER C

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Abstract-A decoupling network for a pair of strongly coupled MIMO antennas is presented. The decoupling network is composed of two inverters and two split ring resonators (SRRs) that are also coupled. By properly transforming the mutual admittance of the original coupled antennas and properly designing the coupling between the two SRRs, more than 20 dB isolation between the two antennas can be achieved while their respective matching performances remain good. To validate the concept, a microstrip decoupling network is designed and implemented for a pair of wideband printed monopole antenna elements. Measurement results have demonstrated that nearly 10% bandwidth for 20 dB isolation can be achieved. Measured radiation patterns have demonstrated a significant reduction of the correlation coefficient, which makes the proposed technique a promising candidate for both current and future generations of MIMO-enabled mobile terminals.

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“…Furthermore, DGS systems have disadvantages in practical implementation due to their complicated ground structures. Port decoupling can also be achieved using suspended metal strip lines that cancel the reactive coupling between antennas, and this is referred to as a neutralization technique [12,13]. However, this method requires an extensive load in the iterative computation procedure in order to determine the length and appropriate points on the elements, and it also has the disadvantage of a narrow bandwidth.…”

Section: Introductionmentioning

confidence: 99%

A Broadband Technique for a Decoupling Network in a Compact Antenna Array in a Mimo System

Ko¹,

Han²,

Myung³

2014

PIER C

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Abstract-Decoupling networks (DNs) have frequently been used to obtain high isolation performance between coupled antennas in multiple-input multiple-output (MIMO) systems due to their advantage of spatial efficiency, which is particularly important for mobile devices. However, conventional DNs suffer from narrowband limitations. In this paper, a broadband decoupling technique is proposed that broadens the isolation bandwidth using a parallel resonant point. A 1.95 GHz MIMO antenna system with 460 MHz of bandwidth (fractional bandwidth, FBW = 23.6%) is designed and measured using the scattering parameters. The isolation is found to be better than −15 dB, while the reflection coefficient is better than −6 dB. Furthermore, the antenna efficiency and envelope correlation coefficient (ECC) are evaluated in a reverberation chamber.

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Study and Reduction of the Mutual Coupling Between Two Mobile Phone PIFAs Operating in the DCS1800 and UMTS Bands

Cited by 450 publications

References 29 publications

A decoupling method for MIMO antennas by using a short stub

A decoupling method for MIMO antennas by using a short stub

A Mimo Antenna Decoupling Network Composed of Inverters and Coupled Split Ring Resonators

A Broadband Technique for a Decoupling Network in a Compact Antenna Array in a Mimo System

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