| 单词 | Yagi antenna |
| 释义 | Yagi antenna Also known as Yagi-Uda antenna.A VHF or UHF vertical antenna array comprising a basic radiator (dipole) antenna supplemented by a slightly longer reflector element mounted directly behind the dipole and a slightly shorter director element mounted directly in front of the dipole. A Yagi antenna is used to improve the directional gain of a television antenna when reception is otherwise weak. Ham radio enthusiasts commonly use homemade Yagi-Uda antennas.The Yagi-Uda antenna was invented at Tohuku University in 1926 by Hidetsugu Yagi (1886–1976), a Japanese electrical engineer, and Shitaro Uda (1896–1976), an assistant professor. See also amateur radio service, antenna, and gain. |
| 随便看 |
|
科学参考收录了5291条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。