Mutual coupling, gain and directivity of an array of two identical antennas

Ludwig, Alon

doi:10.1109/tap.1976.1141440

Cited by 88 publications

(48 citation statements)

References 7 publications

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“…These have applications in mobile phone, PDA, laptop, etc., where miniaturization is desired. The problem of mutual coupling which arises when multiple antenna elements are placed at close spacing results in mixing of signals emanating from multiple antennas [5,6]. Reducing mutual coupling between antenna elements is necessary as it results in poor efficiency and affects the channel capacity.…”

Section: Introductionmentioning

confidence: 99%

Printed Meander Line Mimo Antenna Integrated With Air Gap, DGS and Ris: A Low Mutual Coupling Design for Lte Applications

Kamal¹,

Chaudhari²

2017

PIER C

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Abstract-Multiple-input and multiple-output (MIMO) is currently regarded as key technology for long term evolution (LTE) but a critical effect is mutual coupling (S 21 ) due to space constraint in miniaturized design. A compact-size antenna with low mutual coupling would be an ideal choice for better system performance. This paper describes the design of a small-size (48×48 mm 2 ) MIMO antenna system with low mutual coupling for LTE 800 MHz applications. The antenna system comprises of two FR-4 substrate layers; one printed with two meander line antennas (MLAs), the other printed with reactive impedance surface (RIS) and defected ground structure (DGS). The properties of the antenna like S-Parameters, excited surface current distribution, far-field radiation pattern and diversity performance characteristics were studied. The results indicated that MLAs rendered compactness to the system. Introduction of air gap (AG) between the two substrates, DGS and periodic square patches of RIS resulted in 452 MHz bandwidth and mutual coupling of −41.18 dB between antenna elements. The performance of the proposed design compared with other reported geometry has been demonstrated. Parameters including bandwidth, ratio of antenna area/improvement in S 21 , antenna efficiency and the envelope correlation coefficient were compared. Considering the results, the present system appears to be comparatively more efficient.

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Section: Introductionmentioning

confidence: 99%

Printed Meander Line Mimo Antenna Integrated With Air Gap, DGS and Ris: A Low Mutual Coupling Design for Lte Applications

Kamal¹,

Chaudhari²

2017

PIER C

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4] Usually the multiple-antenna systems require that the distance of adjacent elements should be small to achieve compact terminal size. However, when several antennas come out in close proximity, they suffered from strong mutual coupling, which results in lower efficiency of the antenna and loss of bandwidth that further degrades the performance of either the diversity gain or the spatial multiplexing schemes.…”

Section: Introductionmentioning

confidence: 99%

Mutual coupling efficient analysis of rectangle microstrip circular polarization antenna array

Xing

Sandikie

et al. 2015

Journal of Electromagnetic Waves and Applications

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Mutual coupling performance of the microstrip circular polarization (CP) antenna array is analyzed in this study. Compared with the single antenna application, in the antenna array, the S11, the radiation pattern, and the axial ratio will all be changed due to the mutual coupling and the axial ratio will be more sensitive. To further prove the concept and performance effect, a model of the microstrip antenna array is developed and analyzed in theory. The simulation and measurement results demonstrate that the relative position of antennas in the array exert different effect on the performances of the antenna. Thus, the study provides some very useful results of the CP antenna array.

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“…Strong EM coupling results in the loss of the antenna efficiency and the bandwidth. It also degrades the diversity gain or the performance of the spatial multiplexing scheme [1].…”

Section: Introductionmentioning

confidence: 99%

Compact Waveguided Metamaterials for Suppression of Mutual Coupling in Microstrip Array

Qamar¹,

Park²

2014

PIER

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Abstract-In this paper, suppression of mutual coupling is achieved using compact waveguided metamaterials (WG-MTMs) in between elements of a densely packed microstrip array. Both the E-plane internally folded complementary split ring resonator and the H-plane internally folded complementary split ring resonator are employed to reduce the mutual coupling between adjacent elements. Coupling suppression of 18 dB and 9 dB, for elements in the E-plane and H-plane, respectively, is demonstrated. Due to the compact size of the waveguided metamaterials, the edge-to-edge separation between elements is kept at only 0.093λ 0 . With the same element spacing, a 2 × 2 array is also simulated with compact WG-MTMs. The proposed structure reduces the array size and enables the implementation of compact Multiple-Input-Multiple-Output systems.

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Mutual coupling, gain and directivity of an array of two identical antennas

Cited by 88 publications

References 7 publications

Printed Meander Line Mimo Antenna Integrated With Air Gap, DGS and Ris: A Low Mutual Coupling Design for Lte Applications

Printed Meander Line Mimo Antenna Integrated With Air Gap, DGS and Ris: A Low Mutual Coupling Design for Lte Applications

Mutual coupling efficient analysis of rectangle microstrip circular polarization antenna array

Compact Waveguided Metamaterials for Suppression of Mutual Coupling in Microstrip Array

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