Minimization of Mutual Coupling in Arrays using Cross-shape EBG
Vara Prasad Kudumu1, Venkata Siva Prasad Mokkapati2

1Vara Prasad Kudumu, Assistant Professor in VR Siddhartha Engineering College, Vijayawada, India.
2Venkata Siva Prasad Mokkapati, Professor in R V R & JC College of Engineering and Technology, Guntur, India.

Manuscript received on 23 August 2019. | Revised Manuscript received on 04 September 2019. | Manuscript published on 30 September 2019. | PP: 2599-2603 | Volume-8 Issue-11, September 2019. | Retrieval Number: K18970981119/2019©BEIESP | DOI: 10.35940/ijitee.K1897.0981119
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Abstract: 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.
Keywords: Microstrip antenna array, EBG, Reflection Phase, Dispersion diagram, Surface Waves, Mutual Coupling, AMC, HIS.
Scope of the Article: Microstrip Antenna