Mutual Coupling Reduction in Microstrip Patch Antenna Arrays Using Parallel Coupled-Line Resonators

Vishvaksenan, K. S.; Mithra, Kaliyappa; Kalaiarasan, R.; Raj, Kaliyappa Santhosh

doi:10.1109/lawp.2017.2700521

Cited by 141 publications

(90 citation statements)

References 15 publications

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“…Hence, the value of cf x is 0.53. According to (4) and (5), we can conclude that to achieve the best performance for the filter and the antenna at the same time and the same frequency, the lengths of the vertical and horizontal strips of the proposed isolator should be about a quarter and one eighth of the guided wavelength, respectively at the desired frequency.…”

Section: Parametric Study and Current And Field Distributionsmentioning

confidence: 98%

Design of a very closely‐spaced antenna array with a high reduction of mutual coupling using novel parasitic L‐shaped strips

Zaker

2018

Int J RF Microw Comput Aided Eng

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A very closely‐spaced 2 × 1 microstrip‐patch array antenna is proposed for present and future modern compact array systems. Between the antennas, a novel isolation structure developed from two parasitic L‐shaped strips with only one via for each one is presented to reduce the mutual coupling more than 53 dB at the resonant frequency in 10 GHz in comparison with the conventional array without any isolators. Unlike the other methods, this isolator has a simple and cost‐effective structure with a good performance, low destructive effects on the radiation and resonance position, low design and fabrication complexity, and simple optimization method which can notably block the surface and space waves between the antennas. Simplified semi‐analytical expressions and a guided‐wave‐length‐based parametric study are conducted on key geometrical parameters of the isolator circuit model to determine their effects on the overall behavior. To validate the technique and present its advantages, the final design has been fabricated, measured, and compared with the selected recently proposed suitable works. A good agreement was also achieved in comparison with the simulated results.

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Section: Parametric Study and Current And Field Distributionsmentioning

confidence: 98%

Design of a very closely‐spaced antenna array with a high reduction of mutual coupling using novel parasitic L‐shaped strips

Zaker

2018

Int J RF Microw Comput Aided Eng

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“…Table shows the overall performance of ENZ‐loaded array antennas in comparison with the recently reported MTM enhanced antenna arrays . In the study by Wei et al, a DGS structure implemented to reduce mutual coupling level.…”

Section: Enz‐loaded Array Of Microstrip Patch Antennasmentioning

confidence: 99%

“…The array antenna has a narrow‐band frequency response. In the study by Vishvaksenan et al, miniaturized array antennas with reduced mutual coupling and element separation of about 0.07λ 0 can be obtained using parallel coupled‐line resonators. This method suffers from the narrow‐bandwidth of the original array antennas.…”

Section: Enz‐loaded Array Of Microstrip Patch Antennasmentioning

confidence: 99%

“…The excited surface waves in the antenna substrate are the major source of the mutual coupling between the array elements. Nowadays, many works have been devoted to improving array isolation, such as the defected ground structure (DGS), parallel coupled‐line resonators, neutralization line, parasitic isolator, and incorporating electromagnetic band‐gap (EBG) structures . However, they undesirably increase the ground plane and the resulted antennas are multiple wavelengths in size.…”

Section: Introductionmentioning

confidence: 99%

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A broadband array antenna using epsilon-near-zero metamaterials for MIMO applications

Mazaheri

Jafargholi

2018

Int J RF Microw Comput Aided Eng

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In this article, the capability of epsilon‐near‐zero (ENZ) metamaterial (MTM) to reduce mutual coupling between densely packed array elements is examined. The results show a reduction in mutual coupling between antenna elements and provide a possible way to reduce the element separation. To verify and confirm the simulation results, a prototype of the proposed ENZ structure incorporating an array of closely implemented patch antennas, 0.12λ L, are fabricated and tested. The array antenna has an overall dimension of approximately 2.66λ L × 1.75λ L × 0.05λ L while achieving an average gain and efficiency of 7 dB and 85%, respectively. Measurement shows that the mutual coupling is mostly better than −20 dB across a broad bandwidth of >2.6:1 (10.5–27.7 GHz).

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“…Various bandstop resonators‐based decoupling unit designs that used to occupy less space when compared to CSRR structures and utilize a single standard substrate are reported that helped in the edge‐to‐edge spacing between the radiating elements. These can increase the packing density of the radiators in the antenna aperture, thus resulting in antenna array miniaturization …”

Section: Introductionmentioning

confidence: 99%

Reduced edge‐to‐edge spaced MIMO antenna using parallel coupled line resonator for WLAN applications

Mark

Singh

Mandal

et al. 2019

Micro & Optical Tech Letters

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In this paper, a pair of parasitic parallel coupled line resonators (PCLR) is printed between the two patches that reduce the mutual coupling in multiple‐input‐multiple‐output (MIMO) antenna system. The proposed design offers reduced edge‐to‐edge spacing of 3.5 mm (0.066λo, λo is the free space wavelength) at 5.7 GHz. The proposed decoupling structure of length 0.49λo and area 0.05λo × 0.49λo consists of a pair of parallel coupled lines, placed between the antenna elements and provides a band stop properties over the desired operating band that helps to eradicate the near coupled field. The PCLR decoupling structure helps to improve the isolation and bandwidth by 16 dB and 0.22 GHz, respectively, at the resonating frequency without any change in radiation characteristics of the MIMO system. Moreover, the antenna system yields a good broadside gain of 6.43 dBi, efficiency 70–85%, with acceptable channel diversity performances over the entire operating band (5.47–5.9 GHz). Good agreements between the simulated and measured results make the proposed design approach suitable for a closely packed MIMO system.

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Mutual Coupling Reduction in Microstrip Patch Antenna Arrays Using Parallel Coupled-Line Resonators

Cited by 141 publications

References 15 publications

Design of a very closely‐spaced antenna array with a high reduction of mutual coupling using novel parasitic L‐shaped strips

Design of a very closely‐spaced antenna array with a high reduction of mutual coupling using novel parasitic L‐shaped strips

A broadband array antenna using epsilon-near-zero metamaterials for MIMO applications

Reduced edge‐to‐edge spaced MIMO antenna using parallel coupled line resonator for WLAN applications

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