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Estimation of the characteristic impedance of a transmission line by variational methods

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1 Author(s)
Tsiboukis, T.D. ; Aristotelian University of Thessaloniki, Department of Electrical Engineering, Faculty of Engineering, Thessaloniki, Greece

A large number of field problems cannot be solved exactly. Instead, an approximate solution is obtained by computation. The object of the paper is to draw attention to a method which gives an upper and a lower bound for the exact solution. The method, based on the fact that the basic equations of electromagnetism can be derived from a variational principle, is applicable to a variety of problems having a rather complicated geometry. The effectiveness of the method is illustrated by two characteristic examples.

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Microwaves, Antennas and Propagation, IEE Proceedings H  (Volume:132 ,  Issue: 3 )