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The paper presents a rectangular stepped patch antenna with defective ground plane using metamaterial based split ring structure for RF energy harvesting applications at downlink radio frequency range of GSM-1800. The aim of this design was to enhance the antenna performance with regards to impedance bandwidth and return loss. A simulation study of the design was carried out in the Computer Simulation...
An ultra-wideband (UWB) antenna with filtering property is desirable to overcome the coexisting issue between UWB system and other established narrowband system. A compact UWB antenna integrated with a single band notched is presented in this paper. The proposed antenna is a rectangular patch antenna with a partial ground plane. A 50 Ω microstrip line is used to feed the antenna. A band-stop function...
The design of voltage multiplier module used for energy harvesting system from ambient at downlink radio frequency range (935.2 MHz-959.8 MHz) of GSM-900 is presented. The function of this voltage multiplier circuit is to convert the RF energy signal into DC voltage that can be used to energize the low power electronic devices. The design was based on the Villard voltage multiplier circuit. A 4-stage...
The problem of interference between ultra-wideband (UWB) system and other narrow band systems has been a major concern for a long time. This paper presents a compact UWB antenna that shows desirable band-notch and gain characteristics. The proposed antenna consists of an octagon-shaped patch with a truncated ground plane that is fed by a 50Ω microstrip line. The frequency notch characteristic is obtained...
This paper is purely a model to determine the design circuit to implement Partial Discharge (PD) detection in FPGA technology. The research shall involve ISE Simulator version 10.1i (Xilinx) and ISE Xilinx Synthesized Technology (XST) using Very high integrated circuit Hardware Description Language (VHDL) programming to evaluate the use of Field Programming Gate Array (FPGA) for the detection and...
Currently, FPGA (Field Programmable Gate Array) technology is being widely used for accelerator control owing to its fast digital processing capability. This paper is purely a model to determine the design circuit to implement Partial Discharge (PD) detection in FPGA technology. The research shall involve ISE Simulator version 9.2i (Xilinx) and Very high integrated circuit Hardware Description Language...
The electromagnetic field profile due to partial discharge is simulated. The x, y and z components of the electric and magnetic fields are calculated at the azimuthal plane of the single core xlpe cable, at the near field and far field regions inside and outside the cable. The results from the simulation give indication that the propagation mode of partial discharge signal at near field is hybrid...
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