On 23 November 1963, this site received the first transpacific transmission of a TV signal from Mojave earth station in California, U.S.A., via the Relay 1 communications satellite. The Ibaraki earth station used a 20m Cassegrain antenna, the first use of this type of antenna for commercial telecommunications. This event demonstrated the capability and impact of satellite communications and helped open a new era of intercontinental live TV programming relayed via satellite.
Society: IEEE Main Category: Electric Sub Category: Era: 1960-1969 DateCreated: 1963 Ibaraki Satellite Communication Center Takahagi State: Zip: 318-0022 Country: Japan Website: http://www.ieeeghn.org/wiki/index.php/Milestones:First_Transpacific_Reception_of_a_Television_%28TV%29_Signal_via_Satellite,_1963 Creator:
YearAdded:Image Credit: Era_date_from: 1963
Society: IEEE Main Category: Electric Sub Category: Era: 1920-1929 DateCreated: 1924 Tohoku University Sendai-shi State: Zip: Country: Japan Website: http://www.ieeeghn.org/wiki/index.php/Milestones:Directive_Short_Wave_Antenna,_1924 Creator: Hidetsugu Yagi, Uda, Shintaro
Beginning in 1924, Professor Hidetsugu Yagi and his assistant, Shintaro Uda, designed and constructed a sensitive and highly-directional antenna using closely-coupled parasitic elements. The antenna, which is effective in the higher-frequency ranges, has been important for radar, television, and amateur radio. The antenna system, using a driven element with closely coupled parasitics (usually a reflector and one or more directors) for short-wave work, was first described by S. Uda, a professor at Tohuku University in Japan, in 1926, in the IEEJ (Japan). A colleague, Professor H.
YearAdded:Image Credit: Courtesy IEEE Era_date_from: 1924
Society: IEEE Main Category: Electric Sub Category: Era: 1930-1939 DateCreated: 1930-1945 Tokyo Institute of Technology Nikaho State: Zip: Country: Japan Website: http://www.ieeeghn.org/wiki/index.php/Milestones:Development_of_Ferrite_Materials_and_Their_Applications,_1930-1945 Creator: Takei, Takeshi
Dr. Takeshi Takei, the professor at the Tokyo Institute of Technology, discovered that composite oxides containing zinc and iron have distinguished magnetic properties. In 1930, Prof. Takei submitted a paper on his work to Japanese Electro-chemical Society and also presented a paper at 57th General Meeting of American Electrochemical Society in St. Louis. That same year, Prof. Takei applied a patent for his discovery, which was granted in 1932(Japan PAT-98844). Tokyo Denki Kagaku Kogyo (now TDK Corporation) was founded in 1935 to commercialize this newly invented ferrite cores.
YearAdded:Image Credit: Courtesy Tokyo Institute of Technology Era_date_from: 1930