An Efficient Decoupling Network Between Feeding Points for Multielement Linear Arrays

Zou, Xiao‐Jun; Wang, Guangming; Wang, Yawei; Li, Haipeng

doi:10.1109/tap.2019.2899039

Cited by 103 publications

(45 citation statements)

References 25 publications

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“…Over the last decades, a lot of research work has been devoted to mutual coupling reductions [6]- [25]. Different decoupling techniques have been proposed, such as defected ground structure (DGS) [8], parasitic element [9], electromagnetic bandgap (EBG) [10]- [12], neutralization line [13], asymmetric coplanar wall [14], topology optimization [15], array-antenna decoupling surface (ADS) [16], decoupling ground [17], near-field resonator [18], polarization diversity [19], [20], split ring resonator (SRR) based metasurface [21]- [27] and T-shaped decoupling feeding network [28]. All the above-mentioned methods can effectively mitigate the mutual coupling.…”

Section: Modernmentioning

confidence: 99%

A Metasurface Superstrate for Mutual Coupling Reduction of Large Antenna Arrays

et al. 2020

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In this paper, a ε-negative metasurface superstrate is proposed for mutual coupling reduction of large antenna arrays. Unlike the previous decoupling metasurface works that are mostly confined to two-ports antennas, the proposed decoupling superstrate can be extended to massive multiple-input multiple-output (MIMO) systems. A 4×4 antenna array is used as an example to illustrate the decoupling performance of the proposed metasurface. With the decoupling metasurface, the worst mutual coupling of the antenna array is improved by 8 dB over the operation bandwidth with a maximum mutual coupling reduction of 25 dB. Moreover, the decoupling metasurface also help restore the radiation patterns, bring down the active voltage sanding wave ratio, and broaden the bandwidth of the array.

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Section: Modernmentioning

confidence: 99%

A Metasurface Superstrate for Mutual Coupling Reduction of Large Antenna Arrays

et al. 2020

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“…To demonstrate the potential of the proposed PDT for multiple-element MIMO antennas [34], an extension work of applying the PDT for decoupling a three-element monopole array is conducted. Three monopole antennas, designed to operate at 2.4 GHz with the lengths of 29 mm (about 0/4) and diameters of 1.0 mm, are arranged into an isosceles-triangle array on a Rogers RO 4350 substrate with a size of 60  60 mm 2 , as shown in Fig.…”

Section: Example 4: Decoupling Of Three Monopole Antennasmentioning

confidence: 99%

A Novel Calculation Method to Design Parasitic Decoupling Technique for Two Antennas

Xiao

et al. 2020

IEEE Access

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In this paper, a systematic and calculation-based parasitic decoupling technique (PDT) is proposed to mitigate the mutual coupling between two closely coupled antennas. The adopted parasitic decoupling structure consists of two transmission lines connected to the feed lines of antennas and a parasitic element connected with a transmission line and terminated by a reactive load. Rigorous decoupling theory and systematic design procedures are presented. The lengths of transmission lines and value of reactive load can be precisely calculated to increase antenna isolation. The superiority of the proposed PDT is verified by four decoupling examples. The simulated and measured results show that high isolations over 24 dB, efficiencies above 70%, and envelop correlation coefficients below 0.05 are achieved simultaneously. The results indicate the proposed PDT a promising decoupling method for MIMO systems. INDEX TERMS Decoupling technique, high isolation, MIMO antenna, parasitic element, pattern diversity.

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“…Varieties of techniques have been demonstrated for MIMO antenna decoupling. For instance, the simple way to increase the isolation between antenna elements is to utilize neutralization line (NL) [3] or decoupling network [4] as the decoupling circuit to connect antenna elements. When the decoupling current in interconnector cancels with the coupling current between antenna elements, the high isolation will be achieved.…”

Section: Introductionmentioning

confidence: 99%

Enhancing MIMO Antenna Isolation Characteristic by Manipulating the Propagation of Surface Wave

Yang

Xiao

2020

IEEE Access

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Multiple-input multiple-output (MIMO) antennas have been a mainstream technology in fifth generation (5G) communications. However, strong mutual coupling between both adjacent and nonadjacent elements is inevitable, especially among highly integrated devices. In this paper, a slit embedded mushroom electromagnetic bandgap structure (EBG) is primarily proposed to suppress the propagation of surface wave between antenna elements. Subsequently, complementary split-ring resonators (CSRRs) are periodically arranged in two sides of the ground to steer the surface wave. By effectively utilizing the unusual electromagnetic property of EBG and CSRR to manipulate the propagation of surface wave, the mutual coupling between antenna elements has immensely alleviated. Finally, an H-shape defected ground structure (DGS) is introduced to reinforce decoupling effect. In order to validate the feasibility of the design principle, a prototype of the proposed antenna has been fabricated and measured. Measured results demonstrate that the decoupling concept in this paper is reasonable and approximately 12 dB reduction of mutual coupling is realized. INDEX TERMS Multiple-input multiple-output (MIMO), mutual coupling, slit embedded electromagnetic bandgap structure (EBG), complementary split-ring resonator (CSRR).

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An Efficient Decoupling Network Between Feeding Points for Multielement Linear Arrays

Cited by 103 publications

References 25 publications

A Metasurface Superstrate for Mutual Coupling Reduction of Large Antenna Arrays

A Metasurface Superstrate for Mutual Coupling Reduction of Large Antenna Arrays

A Novel Calculation Method to Design Parasitic Decoupling Technique for Two Antennas

Enhancing MIMO Antenna Isolation Characteristic by Manipulating the Propagation of Surface Wave

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