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In this paper, a novel ultrawideband (UWB) antenna with co-planar waveguide (CPW) feed is presented. The antenna is based on an egg-shaped conductor printed on a 30??40 mm2 FR4 substrate of 1.6-mm thickness. Two configurations of the antenna are studied. In the first, the ground plane features a large egg-shaped slot, and in the second, the ground plane is partial and rectangular in shape. The measured...
Regarding the change of slot in high voltage synchronous generators, and the importance of slot leakage reactance in subtransient and transient short circuit currents and in the amount of synchronous reactance, this paper studies the effect of the changing of slot and conductor shape in high voltage synchronous on the amount of slot leakage reactance, using analytical formula and numerical analysis...
In this paper, a small-size low-cost printed monopole antenna for ultra-wideband operation is presented. The proposed antenna, which was designed and simulated using the FEM-based HFSS, is based on a 20 mm ?? 40 mm ?? 1.6 mm FR4-epoxy dielectric, is microstrip-line fed and has a partial ground plane flushed with the feed line. To verify its frequency response, the antenna is also simulated using CST...
This paper presents the design of a new linear switched reluctance motor (LSRM) structure. The new model has a triple sided configuration for high force density and provides MagLev (magnetic levitation) effect to reduce friction force by decreasing the normal force generated in the system. Characteristics of the LSRM are obtained by using finite element analysis (FEA) and analytical method. The new...
This paper presents the analysis of rotor asymmetry, caused by broken bars, and their effects on the stator current of an induction machine under unbalanced supply voltage. The simulation of the induction machine is based on the finite element method. Experimental tests corroborate with the simulation results.
In this paper, a novel printed-circuit-board (PCB) antenna that employs electronic reconfigurability is presented. The antenna is based on a 1.6 mm-thick FR4-epoxy substrate with dimensions 1 cm ?? 2.5 cm, is microstrip-line fed and has a partial ground plane. The proposed antenna is designed and simulated using the Finite-Element Method (FEM) and the Method of Moments (MoM) for four different switching...
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