Tohoku University announced that it has received an IEEE milestone based on the research results of Professor Emeritus Yasuto Mushiake. The IEEE Milestone is recognized by the Institute of Electrical and Electronics Engineers (IEEE), the world's largest group of engineers, for historic achievements in the field of electrical and electronic technology.In the olden days, Benjamin Franklin's achievements (invention of lightning rods, etc.) and Edison's laboratory (invention of telephones, light bulbs, generators, etc.) have been certified.This is the second time that Tohoku University has won the award.
The title of the award is "Discovery of the relationship between the principle of self-complementary dish in an antenna and Yasuto Mushiake, 1948". By the study of.
In a commonly used antenna, when the frequency changes, the input impedance also changes and its characteristics change significantly, so it is necessary to replace the antenna according to the frequency.On the other hand, the antenna discovered by Dr. Mushimei, which has a constant impedance regardless of the frequency, can be used in an ultra-wide band, and Dr. Mushimei later named it a self-complementary antenna.Furthermore, it was found that the principle of this antenna can be applied to various structures, and it is called the "self-complementary principle". Nowadays, it starts with small devices such as mobile devices and receives radio waves from space. There are many practical examples up to the antenna system.The theory that the input impedance is constant regardless of the frequency was called "Mushimei's relational expression".
It can be said that the principle of self-complementary antenna became a big innovation in the field of broadband wireless telecommunications, and it was recognized that it made a great contribution to the development of industry in the fields of electricity, electronics, information and communication.
