ITU-R BS.139-3-1990 标准详情
- 标准号:ITU-R BS.139-3-1990
- 中文标题:热带地区声音广播的发射天线
- 英文标题:transmitting antennas for sound broadcasting in the tropical zone
- 标准类别:国际电信联盟标准
- 发布日期:1990-06-01
While designing an antenna for night-time operation, the field due to higher order modes such as 2-F should be taken into account. During day-time, ionospheric absorption is considerable, resulting in propagation being limited to only 1 hop. The abso
* 特别声明:资源收集自网络或用户上传,本网站所提供的电子文本仅供参考,请以正式出版物为准。仅供个人标准化学习,研究使用。如有侵权,请及时联系我们!
