BPL授时发播系统天线物理特性的研究

从能量传递和输出波形形成的角度,讨论了长波授时天线-四塔顶荷倒锥天线同电子管发射机和固态发射机的关系。在长波电子管发射机的设计和使用中,合理地选择发射机末级输出网络元件和天线电气参数,保证输出波形符合要求,天线获得最大输出功率。在使用固态发射机时,使天线网络满足能量从半周发生器到天线的最佳传递,并获得所需要的电流波形。进一步讨论了长波授时天线的不足和固态发射机对天线的要求,将天线有效高度与天线几何高度的比值提高到0.7,可使效率带宽积达到最大值。

Physics characteristic of antenna in time servicebroadcast system

This paper delivers from angle of the energy transmittance and the formation of output waveform,while discuss long wave time service antenna.The relation of the long-wave time service antenna with electronic-tube transmitter and solid-state transmitter is discussed.While design and use of electric-tube-transmitter of long wave,rational choice electric parameter of output network element of transmitter and antenna,ensure output waveform be up to the mustard,and the antenna achieve maximal output power.While use of solid-state-transmitter,the antenna network must be ensure that maximal energy transfer from simi-cycle generator to antenna and achieve needful waveform of electric current.Also further discuss insufficiency of the long wave time serve antenna and the request of solid-start transmitter for antenna.If the ratio of antenna effective height and geometrical height advance up 0.7,the product of efficiency and bandwidth can achieve max.