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Complex image theory has been proposed as a means to efficiently calculate the fields induced by a magnetoquasistatic source above the earth. In position location applications, this has enabled an accurate determination of position from measured field strengths. While promising, complex image theory is only an approximation of the true field; inherent errors in position estimation occur due to the...
Position and orientation tracking in the magnetoquasistatic region of an electrically small transmitting loop antenna make use of complex image theory (CIT), which is an approximate algebraic model of the fields above a lossy dielectric, semiinfinite half-space. Experimental demonstrations of CIT from a transmitting loop that approximates a horizontal magnetic dipole (HMD) have been reported previously...
In this paper we report on a magnetoquasistatic orientation sensor that uses the magnetoquasistatic coupling between an electrically small emitting loop (magnetic dipole) and seven vertical receiving loops located on a circle of radius 12.19 m to determine the orientation of an object. By inverting the theoretical expression for the coupling between the emitter and receivers and using complex image...
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