Article révisé par les pairs
| Résumé : | A theoretical expression is derived for the relative error on ε′ and ε′ when measured with the method of Roberts-von Hippel using coaxial transmission lines. This expression is shown to depend on the experimental accuracy of the measureable quantities but also on the characteristic parameters of the sample ε′, ε″ and its thickness h. Numerical calculations show how in various cases these errors change with h. It is also demonstrated that for polar samples the choice of the thickness of the sample may become critical. Some experimental results are given to illustrate this effect. © 1957. |
