中波固态化发射机天调网络的工作原理分析与改进

Working principle and improvement suggestion of MW solid state transmitter antenna tuning network

中波固态发射机的抗干扰能力相对于电子管发射机较差,造成双频共塔的两个发射机以及发射台内所有发射机之间存在明显的相互影响,严重影响了中波固态发射机的工作性能。通过对天调网络的电路工作原理和工作性能的影响因素进行分析,发现这是由于天调网络中滤波电路的缺陷造成的,最后提出了相应的解决方法。

Curing machine anti - interference ability, including defense against lightning and electrostatic ca-pacity, are greatly reduced compared to electron tube transmitter. So in the medium wave transmission system of solid state transmitter, antenna tuning network filtering becomes more important. There exist mutual influ-ence in antenna tuning network between dual band and transmitters inside the station, which severely restricted the transmitters＇ working performance. By investigating its reason, we found that it is caused by the defects in antenna tuning network filtering circuit. And finally, the corresponding solutions are put forward in this paper.