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The tapered line theory in circuit can be applied to the design of the special-shaped monopole antenna in order to obtain better electrical characteristics. So the circular disc monopole antenna is optimum designed and a novel Klopfenstein taper monopole antenna is proposed. The impedance matching characteristic of the Klopfenstein tapered line is the best, and the Klopfenstein taper monopole antenna...
The most widely used configuration of DC machines is series-wound type. The main advantages are simpler control system design and no separately excited field windings. However, the use of DC motors in electric vehicles has declined dramatically in the current decade. Unless the efficiency of such a system can be improved significantly the use of DC motors in electrical vehicles becomes unattractive...
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