1) sky-wave
天波
1.
Accurate Measurement of the Loran-C LF Sky-wave Propagation Time-delay by an indirect Method;
罗兰—C天波传播时延的间接法精确测量
2.
The received 100 kHz long wave signals are sampled with specified 1 MHz and the influence of the sky-wave on the ground-wave is investigated fully to find out the geometrical relationship between the phase tracking point and the detected signal.
为了实现长波授时系统接收机的数字化,提高检测效率,对接收到的100 kHz长波信号进行1 MHz指定频率的采样,充分研究天波对地波信号的影响,找出相位跟踪点与被检测信号的几何关系,提出了一种用数字方式确定相位跟踪点的周期累加值算法。
3.
The stability and space correlation about the sky-wave propagation time-delay in Loran-C system are studied.
研究了罗兰-C天波传播时延的稳定性与空间相关性。
2) Tianbo Liquor Industry
天波酒业
1.
Advance of Tianbo Liquor Industry Co. in Innovation;
“天波酒业”在创新中腾飞
3) microwave antenna
微波天线
1.
A three-dimensional shape measurement technique for microwave antenna;
用于微波天线的三维面形测量技术
2.
First,a simplified structure model of the 10m microwave antenna is built.
首先针对某10m微波天线建立了简化的结构模型;通过对组合结构中不同构件间连接问题的处理,建立了天线结构的有限元分析模型;采用不同风压分布确定风压载荷。
3.
This paper briefly states the widespread and important application of microwave antenna in the communication.
简述微波天线在通信中应用的广泛性和重要性,在对第一菲涅尔区、衰落因子和相对余隙等重要因素详细分析的基础上,提出选择微波天线时应注意的问题,并提出采用分集接收、自适应均衡、阻抗匹配和避雷保护等技术改善微波天线的性能,进而提出微波天线选择的优化方案。
4) skywave identification
天波识别
5) medium wave antenna
中波天线
1.
Analysis of medium wave antenna using elevated radials;
采用架高地网的中波天线分析
2.
The PLC Application of Medium Wave Antenna Automatic Switch System of Radio & TV Transmitting Station;
PLC在广电中波天线开关自动切换系统中的应用
6) semi-wavelength antenna
半波天线
1.
On the basis of studying law of Farad Electromagnetic Induction and the antenna theories in electrodynamics,We can improve the device — semi-wavelength antenna—which is used for receiving electromagnetic waves and apply it to Farad Electromagnetic Induction Experiment.
在研究法拉第电磁感应定律和电动力学中有关天线理论的基础上,将电磁波的接收装置—半波天线加以改进,应用到法拉第电磁感应实验中去,即能方便直观地验证法拉第电磁感应定律,也能形象地诠释麦克斯韦方程的物理意义。
补充资料：天波
通常指射向空中经电离层反射或散射而返回地面的无线电波。由于电离层经常变化，天波传播情况不很稳定，但传播距离可以很远。天波传播是目前短波无线电通信和广播所采用的主要传播方式。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条