scholarly journals Minimization of Mutual Coupling in Arrays using Cross-shape EBG

2019 ◽  
Vol 8 (11) ◽  
pp. 2599-2603
Keyword(s):  
Band Gap ◽  
Mutual Coupling ◽  
Unit Cell ◽  
Operating Frequency ◽  
Design Parameters ◽  
Substrate Thickness ◽  
Electromagnetic Band Gap ◽  
Area Reduction ◽  
Unit Cells ◽  
Current Scenario

In current scenario, the utilization of Electromagnetic Band Gap (EBG) has increased tremendously in microwave engineering. Mutual Coupling (MC) is a significant constraint to be measured in antennas specialization when used with arrays. Electromagnetic Band-Gap (EBG) is a well-known procedure applied in microwave and RF region due to its inherent bandgap feature at predefined frequency. MC arises due to surface currents excited on printed arrays whenever the substrate thickness ℇr > 1. By incorporating EBG in between array elements, various parameters like bandwidth, gain, radiation pattern, directivity, and current distribution can be improved based on the design parameters. Compactness and patch area reduction can be achieved through suitable unit cells of EBG structures. A patch performance is effective with better radiation characteristics and good return loss provided the operating frequency fall within the operating frequency of the unit-cell of the EBG. The unit cell can be constructed depending on the reflection phase, dispersion diagram. In this, a cross-EBG is used to enhance the MC between the arrays. The Cross EBG size is 6.3mm x 6.3mm. The antenna resonates at 5.8GHz WLAN range.

Circularly Polarized Microstrip Antenna Using SLPD Electromagnetic Band Gap Structure

Frequenz ◽  
2020 ◽  
Vol 74 (1-2) ◽  
pp. 41-51
Author(s):  
Alka Verma ◽  
Anil Kumar Singh ◽  
Neelam Srivastava ◽  
Binod Kumar Kanaujia
Keyword(s):  
Band Gap ◽  
Microstrip Antenna ◽  
Impedance Bandwidth ◽  
Electromagnetic Band Gap ◽  
Circularly Polarized ◽  
Unit Cells ◽  
Measured Impedance ◽  
Band Gap Structure ◽  
Peak Gain ◽  
Gap Structure

AbstractIn this article, a new structure comprising of a novel compact slot loaded polarization dependent Electromagnetic Band Gap structure (SLPDEBG), which enhances the performance of circularly polarized rotated square patch antenna by placing SLPDEBG unit cells around it, has been designed. The proposed antenna, having dimensions 0.640 λo x 0.640 λ x 0.0128 λo (λo stands for the free space wavelength at 2.39 GHz), shows that the measured impedance bandwidth and AR bandwidth is 120 MHz and 50 MHz, respectively, with a peak gain of 3.52 dB. Some prominent features of the proposed structure are: front to back ratio of 64, 3 db, beamwidth of 92° at xz-plane and 74° at yz-plane. This prototype antenna finds its application in wireless communication of ISM band. Good performance of the proposed antenna is verified by the close agreement between the simulated and measured results.

Dual Band Notched EBG Structure based UWB MIMO/Diversity Antenna with Reduced Wide Band Electromagnetic Coupling

Frequenz ◽  
2017 ◽  
Vol 71 (11-12) ◽  
Author(s):  
Naveen Jaglan ◽  
Binod Kumar Kanaujia ◽  
Samir Dev Gupta ◽  
Shweta Srivastava
Keyword(s):  
Band Gap ◽  
Mutual Coupling ◽  
Electromagnetic Coupling ◽  
Impedance Matching ◽  
Ground Plane ◽  
Wide Band ◽  
Dual Band ◽  
Ultra Wide Band ◽  
Electromagnetic Band Gap ◽  
Diversity Antenna

AbstractA dual band-notched MIMO/Diversity antenna is proposed in this paper. The proposed antenna ensures notches in WiMAX band (3.3–3.6 GHz) besides WLAN band (5–6 GHz). Mushroom Electromagnetic Band Gap (EBG) arrangements are employed for discarding interfering frequencies. The procedure followed to attain notches is antenna shape independent with established formulas. The electromagnetic coupling among two narrowly set apart Ultra-Wide Band (UWB) monopoles is reduced by means of decoupling bands and slotted ground plane. Monopoles are 90° angularly parted with steps on the radiator. This aids to diminish mutual coupling and also adds in the direction of impedance matching by long current route. S

scholarly journals Two-Dimensional Composite Acoustic Metamaterials of Rectangular Unit Cell from Pentamode to Band Gap

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1457
Author(s):  
Qi Li ◽  
Ke Wu ◽  
Mingquan Zhang
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Band Gap ◽  
Unit Cell ◽  
The Other ◽  
Two Dimensional ◽  
Acoustic Metamaterials ◽  
Acoustic Wave Propagation ◽  
Theoretical Support ◽  
Unit Cells

Pentamode metamaterials have been receiving an increasing amount of interest due to their water-like properties. In this paper, a two-dimensional composite pentamode metamaterial of rectangular unit cell is proposed. The unit cells can be classified into two groups, one with uniform arms and the other with non-uniform arms. Phononic band structures of the unit cells were calculated to derive their properties. The unit cells can be pentamode metamaterials that permit acoustic wave travelling or have a total band gap that impedes acoustic wave propagation by varying the structures. The influences of geometric parameters and materials of the composed elements on the effective velocities and anisotropy were analyzed. The metamaterials can be used for acoustic wave control under water. Simulations of materials with different unit cells were conducted to verify the calculated properties of the unit cells. The research provides theoretical support for applications of the pentamode metamaterials.

scholarly journals Flexible (2 $\times $ 1) MIMO antenna with electromagnetic band gap unit cell for WiMAX applications

2017 ◽  
Vol 25 ◽  
pp. 3061-3072 ◽  
Author(s):  
Hussein Qasim AL-FAYYADH ◽  
Abdulghafor Abdulghafar ABDULHAMEED ◽  
Abdulkareem Swadi ABDULAH ◽  
Haider Mhohammed AlSABBAGH
Keyword(s):  
Band Gap ◽  
Unit Cell ◽  
Electromagnetic Band Gap ◽  
Mimo Antenna

scholarly journals Reduction of Mutual Coupling between Closely Spaced Microstrip Antennas Arrays Using Electromagnetic Band-gap (2D-EBG) Structures

2018 ◽  
Vol 16 (1) ◽  
pp. 151 ◽  
Author(s):  
Ahmed Ghaloua ◽  
Jamal Zbitou ◽  
Larbi El Abdellaoui ◽  
Mohamed Latrach ◽  
Abdelali Tajmouati ◽  
...  
Keyword(s):  
Band Gap ◽  
Mutual Coupling ◽  
Microstrip Antennas ◽  
Electromagnetic Band Gap

scholarly journals Reduction of Mutual Coupling between Radiating Elements of an Array Antenna Using EBG Electromagnetic Band Structures

2021 ◽  
pp. 91-98
Author(s):  
Sara Said ◽  
◽  
Abdenacer Es-salhi ◽  
Mohammed Elhitmy
Keyword(s):  
Communication Systems ◽  
Mutual Coupling ◽  
Array Antenna ◽  
Wireless Communication Systems ◽  
Electromagnetic Band Gap ◽  
High Impedance ◽  
Unit Cells ◽  
Antenna Configuration ◽  
Element Array ◽  
High Impedance Surface

In this paper, a new array antenna configuration based on Electromagnetic Band Gap (EBG) structures has been proposed for 3.5GHz wireless communication systems. The proposed slotted EBG structure, high impedance surface (SHI), consists of three squares and a square ring deposited on a substrate (Rogers RO4350) which has a relative permittivity of 10.2 and a thickness of 1.27mm. Initially a matrix of 3×7 unit cells of EBG structures is introduced between two patches of an array and then a matrix of 3×14 unit cell of EBG structures is integrated between eight patches, which resonate around 3.5GHz (Wi MAX). The insertion of these structures between the radiating elements of an array antenna reduces the mutual coupling and antenna dimensions by approximately (8dB, 11%) and (12 dB, 5%) respectively for two, eight elements array antenna. In addition, the directivity has been slightly improved in the presence of EBG structures, from 4.52dB to 6.09dB for a two-element array antenna, and from 8.18dB to 8.4dB for an eight-element antenna.

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