Analysis of information sources in references of the Wikipedia article "Smith chart" in English language version.
[…] From Fleming's equation,[A] and in an effort to simplify the solution of the transmission line problem, he developed his first graphical solution in the form of a rectangular plot. […] the diagram gradually evolved through a series of steps. The first rectangular chart was limited by the range of data it could accommodate. He was aware of the limitations and kept working on the problem until some time in 1936, when he developed a new diagram that eliminated most of the difficulties. The new chart was a special polar coordinate form in which all values of impedance components could be accommodated. The data for this diagram was scaled from the earlier rectangular diagram. The impedance coordinates in this case were not orthogonal and were not true circles, but, in the form chosen, the standing wave ratio was linear. The chart closely resembled what ultimately became the final result. Phil, however, suspected that a grid made up of a system of orthogonal circles might be more practical. He felt it would have distinct advantages, particularly as regards reproducibility. With this in mind, he spoke to two of his co-workers, E.B. Ferrell and J.W. McRae. Because they were familiar with the principles of conformal mapping, they were able to develop the transformation whereby all data from zero to infinity could be accommodated. Fortunately, curves of constant standing wave ratio, constant attenuation and constant reflection coefficient were all circles coaxial with the center of the diagram. The scales for these values, while not linear, were entirely satisfactory. A diagram designed along these lines was constructed in early 1937. It was essentially the form still being used today. Smith approached a number of technical magazines with regard to publication of the Chart, but acceptance was slow. There were not many technical magazines at the time, and none in the microwave area. However, in January of 1939, after a delay of two years, the article was printed in Electronics magazine. […](xxvi+237+1 pages + envelope with 4 translucent plastic overlays) (NB. There is a 2006 reprint of the second edition by SciTech Publishing, Inc. under the same ISBN and LCCN.) Fleming, John Ambrose (January 1912) [May 1911]. The Propagation of Electric Currents in Telephone and Telegraph Conductors: A Course of Post-graduate Lectures Delivered Before the University of London (revised 2nd ed.). University College, London, UK: Constable & Company Ltd. ark:/13960/t3bz6211d. Retrieved 2023-07-23. (xiv+316 pages)
Diagramma Smita ostayetsya odnim iz naiboleye poleznykh graficheskikh instrumentov dlya razrabotki vysokochastotnykh usilitel'nykh kaskadov. V nashey strane analogichnaya diagramma izvestna kak krugovaya nomogramma A. R. Vol'perta, kotoryy v 1939 g. nezavisimo ot Smita razrabotal i primenil yeye dlya pereschota provodimostey i soprotivleniy v otrezkakh liniy peredachi.Диаграмма Смита остается одним из наиболее полезных графических инструментов для разработки высокочастотных усилительных каскадов. В нашей стране аналогичная диаграмма известна как круговая номограмма А. Р. Вольперта, который в 1939 г. независимо от Смита разработал и применил ее для пересчёта проводимостей и сопротивлений в отрезках линий передачи. [In our country, a similar diagram is known as a circular nomogram of A. R. Volpert, who in 1939, independently of Smith developed and applied it to recalculate conductances and resistances in segments of transmission lines.] [1][2][3] (40+1 pages)
Though Volpert of the Soviet Union and Mizuhashi of Japan proposed essentially the same chart during the same year, Smith received the recognition.
[…] From Fleming's equation,[A] and in an effort to simplify the solution of the transmission line problem, he developed his first graphical solution in the form of a rectangular plot. […] the diagram gradually evolved through a series of steps. The first rectangular chart was limited by the range of data it could accommodate. He was aware of the limitations and kept working on the problem until some time in 1936, when he developed a new diagram that eliminated most of the difficulties. The new chart was a special polar coordinate form in which all values of impedance components could be accommodated. The data for this diagram was scaled from the earlier rectangular diagram. The impedance coordinates in this case were not orthogonal and were not true circles, but, in the form chosen, the standing wave ratio was linear. The chart closely resembled what ultimately became the final result. Phil, however, suspected that a grid made up of a system of orthogonal circles might be more practical. He felt it would have distinct advantages, particularly as regards reproducibility. With this in mind, he spoke to two of his co-workers, E.B. Ferrell and J.W. McRae. Because they were familiar with the principles of conformal mapping, they were able to develop the transformation whereby all data from zero to infinity could be accommodated. Fortunately, curves of constant standing wave ratio, constant attenuation and constant reflection coefficient were all circles coaxial with the center of the diagram. The scales for these values, while not linear, were entirely satisfactory. A diagram designed along these lines was constructed in early 1937. It was essentially the form still being used today. Smith approached a number of technical magazines with regard to publication of the Chart, but acceptance was slow. There were not many technical magazines at the time, and none in the microwave area. However, in January of 1939, after a delay of two years, the article was printed in Electronics magazine. […](xxvi+237+1 pages + envelope with 4 translucent plastic overlays) (NB. There is a 2006 reprint of the second edition by SciTech Publishing, Inc. under the same ISBN and LCCN.) Fleming, John Ambrose (January 1912) [May 1911]. The Propagation of Electric Currents in Telephone and Telegraph Conductors: A Course of Post-graduate Lectures Delivered Before the University of London (revised 2nd ed.). University College, London, UK: Constable & Company Ltd. ark:/13960/t3bz6211d. Retrieved 2023-07-23. (xiv+316 pages)
Though Volpert of the Soviet Union and Mizuhashi of Japan proposed essentially the same chart during the same year, Smith received the recognition.
Though Volpert of the Soviet Union and Mizuhashi of Japan proposed essentially the same chart during the same year, Smith received the recognition.
Diagramma Smita ostayetsya odnim iz naiboleye poleznykh graficheskikh instrumentov dlya razrabotki vysokochastotnykh usilitel'nykh kaskadov. V nashey strane analogichnaya diagramma izvestna kak krugovaya nomogramma A. R. Vol'perta, kotoryy v 1939 g. nezavisimo ot Smita razrabotal i primenil yeye dlya pereschota provodimostey i soprotivleniy v otrezkakh liniy peredachi.Диаграмма Смита остается одним из наиболее полезных графических инструментов для разработки высокочастотных усилительных каскадов. В нашей стране аналогичная диаграмма известна как круговая номограмма А. Р. Вольперта, который в 1939 г. независимо от Смита разработал и применил ее для пересчёта проводимостей и сопротивлений в отрезках линий передачи. [In our country, a similar diagram is known as a circular nomogram of A. R. Volpert, who in 1939, independently of Smith developed and applied it to recalculate conductances and resistances in segments of transmission lines.] [1][2][3] (40+1 pages)
Diagramma Smita ostayetsya odnim iz naiboleye poleznykh graficheskikh instrumentov dlya razrabotki vysokochastotnykh usilitel'nykh kaskadov. V nashey strane analogichnaya diagramma izvestna kak krugovaya nomogramma A. R. Vol'perta, kotoryy v 1939 g. nezavisimo ot Smita razrabotal i primenil yeye dlya pereschota provodimostey i soprotivleniy v otrezkakh liniy peredachi.Диаграмма Смита остается одним из наиболее полезных графических инструментов для разработки высокочастотных усилительных каскадов. В нашей стране аналогичная диаграмма известна как круговая номограмма А. Р. Вольперта, который в 1939 г. независимо от Смита разработал и применил ее для пересчёта проводимостей и сопротивлений в отрезках линий передачи. [In our country, a similar diagram is known as a circular nomogram of A. R. Volpert, who in 1939, independently of Smith developed and applied it to recalculate conductances and resistances in segments of transmission lines.] [1][2][3] (40+1 pages)
Though Volpert of the Soviet Union and Mizuhashi of Japan proposed essentially the same chart during the same year, Smith received the recognition.
