Mutual coupling suppression in microstrip array using defected ground structure

Xiao, Shaoqiu; Tang, Ming‐Chun; Bai, Yan-Ying; Gao, Shanshan; Wang, B.-z.

doi:10.1049/iet-map.2010.0154

Cited by 88 publications

(55 citation statements)

References 23 publications

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“…Also, they include electromagnetic band-gap (EBG) structures, such as mushroom-like EBG structures [8], F-shaped EBG structures [9], and uniplanar compact EBG structures [10,11]. Defected ground structures (DGSs), such as periodic rectangular slits [12], back-to-back U-shaped slots [13], T-shaped slots [14], and loop slots [15] have also been used. More recently, numerous metamaterial-inspired structures have been considered, such as folded single split ring resonators [16], grounded split-ring resonators (GSRRs) [17], multiple split-ring resonators (MSRRs) [18] While the above strategies have reduced mutual coupling, one witnesses certain drawbacks accompanying each of them.…”

mentioning

confidence: 99%

“…Also, they include electromagnetic band-gap (EBG) structures, such as mushroom-like EBG structures [8], F-shaped EBG structures [9], and uniplanar compact EBG structures [10,11]. Defected ground structures (DGSs), such as periodic rectangular slits [12], back-to-back U-shaped slots [13], T-shaped slots [14], and loop slots [15] have also been used. More recently, numerous metamaterial-inspired structures have been considered, such as folded single split ring resonators [16], grounded split-ring resonators (GSRRs) [17], multiple split-ring resonators (MSRRs) [18], complementary split-ring resonators (CSRRs) [19], elliptical split-ring resonators (E-SRRs) [20], embedded circuit (EC) resonators [21], capacitively loaded loop (CLL) resonators [22], waveguide-based resonators [23], composite metamaterials [24][25] [26,27], double-layer mushroom structures [28], and coplanar strip walls [29].…”

mentioning

confidence: 99%

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Mutual Coupling Reduction Using Meta-Structures for Wideband, Dual-Polarized, and High-Density Patch Arrays

Tang

Chen

Wang

et al. 2017

IEEE Trans. Antennas Propagat.

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-A mutual coupling reduction strategy that employs meta-structures is introduced for wideband, dual-polarized, high-density, planar, patch antenna arrays. The meta-structures consist of two types of resonators: grounded capacitively loaded loops (GCLLs) and π-shaped elements. By incorporating the meta-structures into the array configuration, the isolation levels between adjacent radiating elements in both the E-and H-plane orientations are improved by as much as 7.15 dB. The surface current distribution behaviors of the array with only the GCLLs and with only the π-shaped elements are investigated thoroughly to explain the mutual coupling reduction mechanisms. A proof-of-concept array was constructed and tests were performed that validate the reported design principles and simulation results. M. (5G) communication systems [1,2]. It has several unique advantages that arise from its ability to facilitate the presence of additional signal channels instead of requiring the use of extra frequency spectrum or power. Benefits include being able to increase the data capacity and to make the system more adaptable. Index TermsMIMO approaches are based on antenna arrays. With the ever increasing demand for more capacity, it is anticipated that massive MIMO will be central to 5G systems; and it will be facilitated by compact dense arrays. However, strong inter-element coupling occurs when the element spacing is small; it dramatically increases the spatial correlations and seriously deteriorates the signal-to-interference-plus-noise -ratio (SINR) [3]. Consequently, mutual coupling effects between array elements have attracted intense attention.There exist a plethora of reported approaches that are capable of reducing the mutual coupling in the physical layer. However, because of known fundamental physical limitations [4], it cannot be eliminated completely. Nevertheless, mutual coupling reduction can significantly improve the performance of MIMO systems.In general, the existing, most widely used mutual coupling reduction strategies can be classified into the following three categories. One approach focuses on introducing a variety of compact isolation elements between the radiators. The choices have been rather diverse. They include parasitic elements, such as monopoles [5], scatterers [6], and radiation patches [7]. Also, they include electromagnetic band-gap (EBG) structures, such as mushroom-like EBG structures [8], F-shaped EBG structures [9], and uniplanar compact EBG structures [10,11]. Defected ground structures (DGSs), such as periodic rectangular slits [12], back-to-back U-shaped slots [13], T-shaped slots [14], and loop slots [15] have also been used. More recently, numerous metamaterial-inspired structures have been considered, such as folded single split ring resonators [16], grounded split-ring resonators (GSRRs) [17], multiple split-ring resonators (MSRRs) [18] While the above strategies have reduced mutual coupling, one witnesses certain drawbacks accompanying each of them. As a result, their widespre...

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mentioning

confidence: 99%

“…Also, they include electromagnetic band-gap (EBG) structures, such as mushroom-like EBG structures [8], F-shaped EBG structures [9], and uniplanar compact EBG structures [10,11]. Defected ground structures (DGSs), such as periodic rectangular slits [12], back-to-back U-shaped slots [13], T-shaped slots [14], and loop slots [15] have also been used. More recently, numerous metamaterial-inspired structures have been considered, such as folded single split ring resonators [16], grounded split-ring resonators (GSRRs) [17], multiple split-ring resonators (MSRRs) [18], complementary split-ring resonators (CSRRs) [19], elliptical split-ring resonators (E-SRRs) [20], embedded circuit (EC) resonators [21], capacitively loaded loop (CLL) resonators [22], waveguide-based resonators [23], composite metamaterials [24][25] [26,27], double-layer mushroom structures [28], and coplanar strip walls [29].…”

mentioning

confidence: 99%

Mutual Coupling Reduction Using Meta-Structures for Wideband, Dual-Polarized, and High-Density Patch Arrays

Tang

Chen

Wang

et al. 2017

IEEE Trans. Antennas Propagat.

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“…This approach to decoupling between radiating elements has been studied in many configurations, e.g., [50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66]. However, because any of these implementations would require additional area/volume, they would substantially increase the overall size of the system and, hence, would nullify the intended electrically small result.…”

Section: D Magnetic Ez Antennamentioning

confidence: 99%

The directivity of a compact antenna: an unforgettable figure of merit

Ziolkowski

2017

EPJ Appl. Metamat.

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Abstract. When an electrically small antenna is conceived, designed, simulated, and tested, the main emphasis is usually placed immediately on its impedance bandwidth and radiation efficiency. All too often it is assumed that its directivity will only be that of a Hertzian dipole and, hence, its directivity becomes a minor consideration. This is particularly true if such a compact antenna radiates in the presence of a large ground plane. Attention is typically focused on the radiator and its size, while the ground plane is forgotten. This has become a too frequent occurrence when antennas, such as patch antennas that have been augmented with metamaterial structures, are explored. In this paper, it is demonstrated that while the ground plane has little impact on the resonance frequency and impedance bandwidth of patch antennas or metamaterial-inspired three-dimensional magnetic EZ antennas, it has a huge impact on their directivity performance. Moreover, it is demonstrated that with both a metamaterialinspired two-element array and a related Huygens dipole antenna, one can achieve broadside-radiating electrically small systems that have high directivities. Several common and original designs are used to highlight these issues and to emphasize why a fundamental figure of merit such as directivity should never be overlooked.

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“…The others are used in the special applications including MIMO antennas and arrays for low mutual coupling and improved radiation performance. Xiao et al [2] have suggested back-to-back U-shaped defected ground structures (DGS). For the reported design in [3,4], shorted patches were used to prevent excitation of the surface wave mode.…”

Section: Introductionmentioning

confidence: 99%

“…The detailed comparisons between the techniques presented in the literature and the method proposed in this paper are listed in Table 1. A two-element antenna is used, and an isolation as high as possible is needed between transmit and receive antenna in the field of MIMO technology and radar applications. This can be seen in the large number of publications using two-element structures, including [2] and [4][5][6][7]. This requirement is driving our research to study a new way for reducing mutual coupling between cavity-backed slot antennas in satellite communication system.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Mutual Coupling Between Cavity-Backed Slot Antenna Elements

Zhang¹,

Zhang²,

Wu³

2014

PIER C

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Abstract-Maintaining mutual coupling suppressing structure as simple as possible is becoming attractive in the electromagnetic and antenna community. A novel parasitic patch structure that can reduce mutual coupling between cavity-backed slot antenna elements is proposed and studied. The structure consists of only a simple rectangular patch inserted between the antenna elements, and it is therefore low cost and straightforward to fabricate. The proposed structure can not only suppress the surface-mode propagation and reduce mutual coupling between slot antennas, but also improve radiation patterns. The features include small occupied area and very simple structure.

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Mutual coupling suppression in microstrip array using defected ground structure

Cited by 88 publications

References 23 publications

Mutual Coupling Reduction Using Meta-Structures for Wideband, Dual-Polarized, and High-Density Patch Arrays

Mutual Coupling Reduction Using Meta-Structures for Wideband, Dual-Polarized, and High-Density Patch Arrays

The directivity of a compact antenna: an unforgettable figure of merit

Reduction of Mutual Coupling Between Cavity-Backed Slot Antenna Elements

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