| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 493002 | Procedia Technology | 2013 | 8 Pages |
UHF method to detect partial discharge phenomenon has been proven to be an effective way. Many types of UHF antennas have been developed in order to achieve a better sensitivity and accuracy in certain bandwidth (300 MHz – 3.0 GHz) for detecting the ultra-high frequencies generated by partial discharge. Bowtie antenna is one type of broadband antenna proven to be sensitive, accurate and easily designed and fabricated. This paper focused on the bowtie antenna characteristics both the measurement using vector network analyzer and simulation. The finite-difference time-domain (FDTD) technique is applied to model and confirm the antenna under observation in this research and later on modify to enhance the better performance. Simulation has proven, antenna achieves the optimum angle at flare angle of 60° as per simulation within the frequency range over 913 MHz –3.0 GHz as per measurement. The simulation results are used to construct the new modified antenna which showed the better sensitivity in the frequency bandwidth of partial discharge. The Gigahertz transverse electromagnetic (GTEM) like environment also used to simulated the sensitivity of antenna as compared to the calibration value approximately 11.0 mm.
