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In this paper, a meander line dipole antenna for Ultra High Frequency Radio Frequency Identification (UHF RFID) tag applications is presented. The proposed antenna consists meandered dipole with end spiral conductor, an inductively coupled parasitic element for size miniaturization and T-loop for feed structure. The antenna is designed for North America UHF RFID frequency band (902–928 MHz) with Alien...
Optimized common-mode (CM) filter design requires accurate knowledge of both the noise source and the termination impedances. In this paper, an in-circuit impedance extraction method is employed to determine CM impedance of a motor drive system. The CM impedance extracted allows systematic CM filter design without a trial-and-error approach.
This paper proposes an online dynamic electro-thermal model to compute the junction temperature of an IGBT under real time operating conditions. The proposed computational model is based on transient thermal capacitance and power loss calculations. Insulated Gate Bipolar Junction Transistor is popularly used in mission safety critical applications such as aerospace. Usually mission critical application...
In this paper the inductive degenerated Differential Low Noise Amplifier (DLNA) is designed with operating frequency 2.4 GHz using 0.18 μm CMOS Technology. The DLNA is biased at 1.8 V supply and perfectly matched with input impedance of 50 Ω. Designed DLNA provides power gain of 21.59 dB with a noise figure of 398.1 mdB.
Insulated gate bipolar transistor (IGBT) devices have gained leading position in traction and aerospace applications. The failure of these switches (IGBT) can reduce the efficiency of the system. Two most dominated failure mechanisms of IGBTs are solder fatigue and bond wire lift off. One of the major effects which influence these failure mechanisms is thermal impedance characteristics, which depends...
In this paper, the design methodology and implementation of a digitally controlled, synchronous gate driven and flexible Electronic Power Conditioner (EPC) have been discussed. With incorporation of an FPGA (Field Programmable Gate Array) as its controller, forward topology with active clamp Zero Voltage Switching (ZVS) Technique and synchronous rectification, this dc-dc converter offers flexibility...
Polypyrrole/carbon (PPy/C) composites have been synthesized using varying concentration of p-toluenesulfonate (pTS) dopant by surface initiated in-situ chemical oxidative polymerization with the purpose to develop an electrode material for supercapacitors. The influence of pTS on the structure of the composite is observed through Fourier transform infrared (FT-IR) and Raman spectroscopy while the...
Recent works indicate that through the non-invasive application of low current waveforms to the brain, systems implementing both cortical stimulation (Transcranial Direct Current Stimulation) and imaging (Electrical Impedance Tomography) with a high degree of accuracy and effectiveness can be realised. Safety and physical constraints along with the individually unique and fractal-like functional,...
This paper presents the analysis of circular patch antenna as an electromagnetic interference sensor in microwave frequency range. The paper describes the performance of circular patch antenna as EMI sensor in terms of antenna factor and radiation characteristics. The designed patch antenna is simulated using commercial software Computer Simulation Technology Microwave Studio. The designed patch antenna...
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