Yagi Hidetsugu

Yagi Hidetsugu

Yagi Hidetsugu ( Japanese 八 木 秀 次 ; born January 28, 1886 in Osaka Prefecture , † January 19, 1976 in Tokyo ) was a Japanese physicist . From 1924 he developed the Yagi-Uda antenna with Uda Shintarō (usually just referred to as Yagi antenna ).

biography

In 1909, Yagi earned a degree in electrical engineering - engineering at the Tokyo Imperial University .

To continue his studies, he traveled from the year 1913 by Great Britain , the United States and to Germany , where he continued his research in the field of electromagnetic waves for the purpose of communication via radio deepened. Among other things, he learned at the TH Dresden under the direction of Heinrich Barkhausen .

In 1916 he returned to his homeland and received a professorship there in 1919 at the Faculty of Engineering at the Imperial University of Tōhoku . There he quickly established his research in the field of electromagnetic waves and made a number of publications.

Yagi-Uda antenna

In 1926 he patented a directional VHF antenna for the first time together with his colleague Shintaro Uda, who presented it to the public for the first time in the same year, which is why the Yagi antenna is known as the Yagi-Uda antenna, especially in Japan. In February 1926, he and Uda published the article Projector of the Sharpest Beam of Electric Waves in the Proceedings of the Imperial Academy of Japan. The capabilities of this invention were initially underestimated in Japan, and so the antenna found widespread use mainly in Europe and the USA, where it was produced industrially after the publication of Yagi's work in 1928. It was not until the Second World War that Japan recognized the potential of the “Yagi antenna” when it was learned that it was being used as a radar antenna by other warring parties . a. also to determine the height of the explosion of the Hiroshima bomb . Today the " Yagi antenna " is mainly known and used as a television antenna . However, it is also used in other areas, especially for the high-frequency frequency bands VHF and UHF .

In 1935, Yagi was appointed dean of the faculty of industrial science in Tokyo. Seven years later, in 1942, he became General Director of the Technical Institute and in 1944 President of the Osaka Imperial University . He was committed to promoting young physicists, including from Yukawa Hideki , who was the first Japanese to receive the Nobel Prize in physics in 1949 . He helped found the Japanese Fabian Society in 1947 and joined the Socialist Party of Japan in 1953 . In 1956 he was awarded the Order of Culture .

literature

• Kurt Jäger, Friedrich Heilbronner: Lexicon of electrical engineers . 2nd, revised and expanded edition. VDE, Berlin / Offenbach 2010, ISBN 978-3-8007-2903-6 .

swell

• Hidetsugu Yagi (Italian source)

Individual evidence

1. ^ Hidetsugu Yagi, Shintaro Uda: Projector of the Sharpest Beam of Electric Waves . In: Proceedings of the Imperial Academy . Vol. 2, No. 2 , 1926, p. 49-52 , doi : 10.2183 / pjab1912.2.49 ( JST.Journalarchive / pjab1912 / 2.49 ).

Japanese name: As is common in Japan, the family name comes before the first name in this article . So Yagi is the family name, Hidetsugu the first name.