This paper presents tables of the phase associated with a semi-infinite unit slope of attenuation. The phase is given in degrees to .001 degree with an accuracy of ± .001 degree and in radians to .00001 radian with an accuracy of ± .000015 radian. The method of constructing the tables and a brief analysis of the errors are given. An appendix, which gives a detailed explanation with specific examples of the use of the tables in determining the phase associated with a given attenuation characteristic or the reactance associated with a given resistance characteristic by means of the straight line approximation method given in Bode's “Network Analysis and Feedback Amplifier Design,” is included for the benefit of those who are not already acquainted with this method. The Appendix also presents an example of a non-minimum phase network 1 in which the minimum phase determined from the attenuation characteristic fails to predict the true phase of the network.
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Donald E. Thomas (1947) studied this question.