• G. M. Pushpanjali
• K. Prahlada Rao
• Vani R. M.

Present work demonstrates the study of microstrip antenna array with electromagnetic band gap structure and defective ground structure. Obtained results shows the reduction of isolation between the radiating elements of microstrip antenna array with said designing structures. Proposed four element microstrip antenna array exhibits improved bandwidth and gain of 64.62 % and 14.9 dB respectively as against the bandwidth and gain of 4.89 % and 6.81 dB of conventional microstrip antenna array. Further, the proposed antenna array is producing good reduction in mutual coupling equal to -31.51, -31.95 and -33.38 dB respectively. Proposed antenna also produces virtual size reduction of 43.39 % and enhanced radiation characteristics. The antenna arrays are designed at 6 GHz which is at super high frequency band. The dielectric substrate FR-4 glass epoxy with the height of 0.16 cm is used to fabricate the presented antennas. Radiating patches of antenna arrays are designed using Mentor Graphics IE3D software and excited by corporate feeding technique. The experimental results of designed antenna are obtained using vector network analyzer.

defective ground structure, electromagnetic band gap structure, corporate feeding technique, gain, mutual coupling, radiation pattern, return loss

"EXCITATION STRUCTURESTO MICROSTRIP ANTENNA ARRAY FOR REDUCED ISOLATION AND BACK LOBE RADIATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 5, page no.a254-a262, May-2024, Available :http://www.jetir.org/papers/JETIR2405032.pdf

"EXCITATION STRUCTURESTO MICROSTRIP ANTENNA ARRAY FOR REDUCED ISOLATION AND BACK LOBE RADIATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 5, page no. ppa254-a262, May-2024, Available at : http://www.jetir.org/papers/JETIR2405032.pdf