Minufiya Journal of Electronic Engineering Research F a c u l t y o f E l e c t r o n i c E n g i n e e r i n g - M i n u f i y a U n i v e r s i t y  Performance Evaluation of Coded Cooperative Relay Based OFDM Wireless Communication System Ahmed S. Mohamed, Mohammed Abd-Elnaby and Sami A. El-Dolil 01  Performance Study of Different Approaches Used in the Design of Hierarchical Routing Protocols for Wireless Sensor Network Amr M. Kishk, Nagy W. Messiha, Nawal A. El-Fishawy, Abd-Elrahman A. Alkafs, and Ahmed H. Madian 25  Two Efficient Unit Cell Designs for Polarization Independent 5-G Reflectarrays Rania Elsharkawy, A.R. Sebak, Moataza Hindy, Osama M. Haraz, Adel A. Saleeb, and El-Sayed M. El-Rabaie Darwish 53  A Survey of Different Steganography Techniques E. A. Elshazly, Safey A. S. Abdelwahab, R. M. Fikry, O. Zahran, S. M. Elaraby and M. El-Kordy 66  Maximum Power Techniques of Wind Energy System Walaa Mohammed and Galal.Atlam 103  Maximum Power Point Tracker of PV using Fuzzy Controller Walaa Mohammed and Galal.Atlam 119 لكترونيــةهندســة اليــة ال كل– عــة المنوفيــ جام ة Faculty of Electronic Engineering-Minufiya University Vol. 25 - No. 1 January 2016 ISSN 1687-1189 52/2/2002: رقم اليداع MJEER 25 – 1