Mutual coupling reduction in multilayer patch antennas via meander line parasites

Maddio, Stefano; Pelosi, Giuseppe; Righini, Monica; Selleri, Stefano; Vecchi, I.

doi:10.1049/el.2018.1332

Cited by 25 publications

(12 citation statements)

References 8 publications

(11 reference statements)

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“…Various research works have been conducted to study the mutual coupling effect in an array and various techniques have been proposed to reduce the mutual coupling . Parasitic patches and parasitic meander line, soft or hard surfaces, defected ground structure, bandgap structure, metamaterial, and electromagnetic three‐dimensional (3D) wall are a few techniques proposed in the literature to reduce mutual coupling by blocking or minimizing surface current flow. These techniques are in common practice and easier to fabricate (if planar); however, they are complex to comprehend and design.…”

Section: Introductionmentioning

confidence: 99%

Beam scanning annular slot‐ring antenna array with via‐fence for wireless power transfer

Minz

Park

2020

Int J RF Microw Comput Aided Eng

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Wireless power transfer has been the field of research for many decades, and with technological advancement and increase in wireless mobile devices, the future of wireless power transfer technology is very promising. The major requirement of wireless power transfer is an efficient and compact antenna array with high gain and flawless scanning performance. In this article, a 4 × 8 element array is proposed with a gain of 18 dB and scanning capability of ±45 in azimuth and elevation plane at 5.8 GHz. The overall size of the array is 100 mm × 200 mm. The element separation in the array is only 0.48 λ. There

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Section: Introductionmentioning

confidence: 99%

Beam scanning annular slot‐ring antenna array with via‐fence for wireless power transfer

Minz

Park

2020

Int J RF Microw Comput Aided Eng

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“…The first type is artificial electromagnetic material, which contains electromagnetic bandgap [2], frequency selective surface [3], metasurface [4,5], defected ground structure [6][7][8][9], and array-antenna decoupling surface [10]. The second type is resonant structure [11,12], which is employed to decouple antenna arrays at certain frequencies based on its resonant characteristic. The last one is to introduce a decoupling network [13,14] to create extra currents to cancel out the coupled ones, and it is often adopted for dual-band cases [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Decoupling of Dual-Band Microstrip Antenna Array With Hybrid Resonant Structure

Li¹

2020

PIER Letters

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A novel hybrid resonant structure is proposed to decouple a dual-band microstrip antenna array. The decoupling structure is composed of two H-shaped strips, and the lower and upper ones respectively collaborate with an X-shaped slot to reduce mutual coupling at 4.5 GHz and 5.5 GHz. Two sub-patches of different sizes share a connection feeding line to construct the dual-band array element, which is arranged along H-plane with the edge-to-edge spacing 0.15λ l and 0.24λ h (λ l and λ h are the free-space wavelengths of 4.5 GHz and 5.5 GHz, respectively). Simulated and measured results indicate that through loading the hybrid resonant structure, 31.6 dB and 24.0 dB reductions of mutual coupling at two frequencies are obtained, while the levels of coupling coefficients are both below −30 dB in two operating bands. Moreover, the modified radiation patterns, improved diversity metrics, and weakened coupled current distributions further verify its superior decoupling capability. The proposed decoupling structure reveals its promise in being employed in communication system and multielement linearly antenna arrays.

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“…There are numerous approaches to improve the isolation between close radiators. Some of these techniques are polarisation diversity [8], insertion of defected ground structures (DGS) [2,7,[9][10][11][12][13], parasitic elements [14], electromagnetic bandgap (EBG) structures and metamaterials [3,5,[15][16][17], neutralisation lines [10], and coupling-decoupling networks for each pair of antennas [18,19]. These methods are often combined to obtain better MIMO attributes.…”

Section: Introductionmentioning

confidence: 99%

Characteristic mode analysis applied to reduce the mutual coupling of a four‐element patch MIMO antenna using a defected ground structure

Fritz‐Andrade

Miguel

Gómez‐Villanueva

et al. 2019

IET Microwaves, Antennas & Propagation

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A multiple‐input–multiple‐output (MIMO) microstrip patch antenna array of four elements is proposed to cover the 5.8 GHz WLAN band. The characteristic mode analysis is carried out to design a defected ground structure that improves the MIMO performance without impacting negatively the radiation characteristics of the four‐element array. Simulations and measurements demonstrate that the implemented prototype reaches a maximum mutual coupling of −32 dB and a gain‐per‐element of 5.3 dB with good MIMO attributes, surpassing many other proposals in the antenna literature: maximum envelope correlation coefficient of 0.0001, diversity gain very close to 10 dB, capacity loss false(Clossfalse) near to 0.0023 bps/Hz at the resonant frequency, multiplexing efficiency )(ηmunormalxij of 0.935, and a total active reflection coefficient weakly dependent on the excitation phases. The presented design is proposed for operation on the IEEE 802.11a/n standard.

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Mutual coupling reduction in multilayer patch antennas via meander line parasites

Cited by 25 publications

References 8 publications

Beam scanning annular slot‐ring antenna array with via‐fence for wireless power transfer

Beam scanning annular slot‐ring antenna array with via‐fence for wireless power transfer

Decoupling of Dual-Band Microstrip Antenna Array With Hybrid Resonant Structure

Characteristic mode analysis applied to reduce the mutual coupling of a four‐element patch MIMO antenna using a defected ground structure

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