DEVELOPMENT OF A WEB-LIKE HEXAGON SHAPED ELECTROMAGNETIC (EM) TRANSMITTER

• Main Author: AHMAD, NUR AZLIZA
• Format: Thesis
• Language: English
• Published: 2010
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://utpedia.utp.edu.my/2838/1/2010%20-ELECTRIC-DEVELOPMENT%20OF%20A%20WEB-LIKE%20HEXAGON%20SHAPED%20ELECTROMAGNETIC%20%28EM%29%20TRANSMITTER-NUR%20AZLIZA%20BINTI%20AHMAD.pdf; http://utpedia.utp.edu.my/2838/
• Institution: Universiti Teknologi Petronas

Direct detection of hydrocarbon using powerful electromagnetic (EM) source in seabed logging (SBL) application has remained a challenge because the size of recent transmitter is too huge. Thus, a new web like hexagon shaped transmitter is proposed as a new invention, this is due to its abilities in concentrating the EM field on its centre and minimizing the size of transmitter. Hexagon shape is the best design in terms of radiation power with 579.86% compared to the dipole transmitter by using Applied Wave Research (AWR) software. From Computer Simulation Technology (CST) software, web like hexagon shape with 20 turns shows the 215.85% increasing of electric field compared to 5 turns. Combination of EM transmitter with Ni0.8Zn0.2Fe2O4 toroid could enhance the EM field at the transmitter. Hence, web like hexagon shaped transmitter was constructed by using copper wire in diameter of 0.08 cm with 20 turns and comparison of magnetic field with and without magnetic feeder were conducted. Ni0.8Zn0.2Fe2O4 nanoparticles were successfully synthesized using self combustion technique. The samples were then sintered at 800 0C, 900 0C and 1200 0C for 4 hours respectively. All sintered samples exhibited single phase Ni0.8Zn0.2Fe2O4 that was confirmed by the [311] plane as the major plane as revealed by XRD results. The calculated average crystallites sizes for these three samples were in the range of 20 – 50 nm determined using Scherer equations. Agilent LCR Impedance Analyzer Meter was used to determine the magnetic properties of Ni0.8Zn0.2Fe2O4 toroids which involved the measurements of initial permeability Qfactor and relative loss factor (RLF). Finally, magnetic field of web like hexagon shaped transmitter had increased by 1228.21 % at further offset by placing Ni0.8Zn0.2Fe2O4 as a magnetic feeder for 20 turns.