The Study on the Effect of Electromagnetic Band Gap on Microstrip Array Antenna At 28 GHz
Keywords:Microstrip, Electromagnetic band gap (EBG) structure, 28 GHz, Mushroom Shaped EBG, Fractal EBG,
AbstractA microstrip patch array antenna with Electromagnetic Band Gap (EBG) structure 28 GHz is presented. The antenna objective is to achieve the high directivity. Rogers Duroid RT5880 is chosen to be based substrate with a dielectric constant is 2.2 and the thickness is 0.254 mm. Uni-planar electromagnetic Band-Gap (EBG) scheme is presented for size reduction, the proposed structure can be considered as an ameliorated uni-planar compact EBG (UC-EBG) in a fractal from the conventional shape which significantly enlarges the fringe capacitance to compress the overall size of the unit cell. The Computer Simulation Technology Microwave Studio 2016 software has been used. By selecting optimum parameters, the simulated return loss of proposed antenna during design frequency (28 GHz) is -40.491 dB at 28.03GHz it is before addition of EBG and 48.751 dB after the addition of EBG is. In addition, the value of directivity is also increased after addition of EBG, which is 17.01 dBi and the achieved bandwidth is 960 MHz. Antenna with a higher gain and bandwidth is good for that is satellite communication and for next generation.
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