Fractal EBG structure for shielding and reducing the mutual coupling in microstrip patch antenna array

Naderi, Mohammad; Zarrabi, Ferdows B.; Jafari, Fereshteh Sadat; Ebrahimi, Speideh

doi:10.1016/j.aeue.2018.06.028

Cited by 31 publications

(20 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concept of EBG arises from the optical domain, where photonic crystals can forbid the propagation of light or allow it in certain directions. This feature can be used in suppressing surface-waves and realization of EBG resonator antennas [15][16][17][18]. These periodic structures are composed of a metallic or dielectric element, mostly in the form of 2D and 3D structure geometries.…”

Section: Ebg Unit Cellmentioning

confidence: 99%

See 1 more Smart Citation

Mutual Coupling Reduction in Microstrip Array Antenna by Employing Cut Side Patches and Ebg Structures

Mohamadzade¹,

Lalbakhsh²,

Simorangkir³

et al. 2020

PIER M

View full text Add to dashboard Cite

This paper presents the simultaneous application of Minkowski fractal geometry and EBG structures for mutual coupling reduction in microstrip array antennas for the first time. In this approach, a modified version of Minkowski fractal geometry is applied on the patch elements, and at the same time 1D electromagnetic bandgap (EBG) structures, composed of 4 EBG elements, are placed between the array elements in a very close distance. Unlike many other coupling reduction methods, which have at least one of the issues of gain reduction or complex fabrication, the proposed method does need any via or double-sided etching and slightly increases the gain of the antenna, while an excellent reduction level of 22.7 dB has been achieved. To verify the concept, 2 array antennas with the spacing of λ 0 and λ 0 /3 were fabricated and tested, showing very good agreement between predicted and measured results.

show abstract

Section: Ebg Unit Cellmentioning

confidence: 99%

“…1. The idea of using EBG-based unit cells for mutual coupling reduction comes from [18], in which the unit cells are used for improving the bandwidth of Fabry-Perot antennas. The EBG structure can be modelled by an LC equivalent circuit if the periodicity of structure is small compared to the operating wavelength [19].…”

Section: Ebg Unit Cellmentioning

confidence: 99%

Mutual Coupling Reduction in Microstrip Array Antenna by Employing Cut Side Patches and Ebg Structures

Mohamadzade¹,

Lalbakhsh²,

Simorangkir³

et al. 2020

PIER M

View full text Add to dashboard Cite

show abstract

“…The uni-conductor electromagnetic bandgap (UC-EBG) periodic cells are placed between antennas which act as barriers for surface waves to provide high isolation [14]. Also in [15], fractal shape EBG structure has been considered to reduce the mutual coupling for the array antenna design. While a multilayered electromagnetic bandgap (EBG) structure is incorporated into a MIMO antenna to reduce unexpected mutual coupling between antenna elements [16].…”

Section: Introductionmentioning

confidence: 99%

Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins

et al. 2021

View full text Add to dashboard Cite

In this paper, a metasurface-based multiple-input multiple-output (MIMO) antenna with high isolation between antenna elements is presented. The main patch radiator is sandwiched between a metasurface and a ground plane to achieve performance enhancement. The fabricated single element antenna has a compact size of 0.85λ0 × 0.85λ0 × 0.038λ0. The antenna exhibits a wideband operational bandwidth from 3.27 to 3.82 GHz for |S11| < −10, which corresponds to a fractional bandwidth of 15.5%. Moreover, stable radiation patterns with a peak gain of 8.1 dBi are also achieved across the operating band. The proposed single element antenna is characterized for 2 × 2 MIMO system by translating each antenna element orthogonal to each other. A decoupling structure consisting of slots and metallic strip with shorting pins is used to improve the isolation between the MIMO elements. The shorting pins connect the metallic strips (located between MIMO elements) on the metasurface and ground plane. These slots on ground plane and shorting pins affect the electromagnetic field distribution and consequently reduce the mutual coupling. The fabricated MIMO antenna has a compact size of 1.75λ0 × 1.75λ0 × 0.038λ0. The proposed 4 port (2×2) MIMO antenna provides 15.9% of 10 dB impedance bandwidth from 3.3 to 3.87 GHz with a peak gain of 8.72 dBi. Moreover, the proposed MIMO antenna offers excellent diversity performance, isolation between antenna elements is very high (>32dB), ECC is lower than 0.001, and diversity gain is 9.99 dB very close to the ideal value of 10dB. Owing to these features, the proposed MIMO antenna can be a good candidate for 5G Sub-6 GHz (n78 band) smart devices and sensors.

show abstract

“…Good isolation is achieved in UWB-MIMO antennas of size 32 × 32 mm 2 with a defected ground structure and long thin narrow slot in the bottom plane to suppress the surface waves, with operating frequency from 3.1 to 10.6 GHz [9]. Fractal EBG structures are used to reduce the coupling between elements and discussed [10]. Coupling is reduced between the two-port antenna by making C and inverted C shaped slots in the ground plane [11].…”

Section: Introductionmentioning

confidence: 99%

Design and Parametric Analysis of Hexagonal Shaped Mimo Patch Antenna for S-Band, Wlan, Uwb and X-Band Applications

Addepalli¹,

Anitha²

2019

PIER C

View full text Add to dashboard Cite

In this paper, a hexagonal-shaped multiple-input multiple-output (MIMO) patch antenna is presented. It covers the S band (2-4 GHz), WLAN (2400-2480, UWB (3.1-10.6 GHz), and X band (8-12 GHz) applications. The proposed structure is simulated and fabricated on an FR4 substrate with overall dimensions of 0.186λ 0 × 0.373λ 0 and separation of two patches with a distance of 0.053λ 0 (where λ 0 is the wavelength at 2 GHz). The single UWB patch is antenna derived from the triangular-shaped edge cuttings in the bottom of the rectangular patch antenna with a partial and defected ground. The proposed MIMO structure produces simulated results from 2 GHz to 13.3 GHz and measured results from 2.1 GHz to 12.9 GHz, with good agreement. The proposed structure resonates at 3.4 GHz, 5.8 GHz, 10.2 GHz, and 11.8 GHz. The isolation is improved to above 20 dB by placing an E-shaped tree structure and parasitic element in most of the band. The radiation efficiency and peak gain values are 78-94% and 1.4-6.6 dB, respectively. Diversity performance of the proposed structure is verified with low envelope correlation coefficient (ECC < 0.04), high diversity gain (DG > 9.985), and acceptable total active reflection coefficient (TARC < −10 dB) values.

show abstract

Fractal EBG structure for shielding and reducing the mutual coupling in microstrip patch antenna array

Cited by 31 publications

References 28 publications

Mutual Coupling Reduction in Microstrip Array Antenna by Employing Cut Side Patches and Ebg Structures

Mutual Coupling Reduction in Microstrip Array Antenna by Employing Cut Side Patches and Ebg Structures

Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins

Design and Parametric Analysis of Hexagonal Shaped Mimo Patch Antenna for S-Band, Wlan, Uwb and X-Band Applications

Contact Info

Product

Resources

About