摘要
根据功率最大传输定理,要使中波广播发射机向天线传输功率的效率最大,必须使天线的阻抗与发射机的阻抗匹配。在中波广播发射系统中,是利用天调网络进行阻抗匹配的,天调网络的设计和维护是中波广播发射台的重要技术组成部分,充分了解单频天调网络的设计、安装和调试的方法对学习广播发射台中波天调网络相关知识具有重要意义。本例中通过数学公式,计算出所需的电感、电容的参数,确定它们的型号,再用网络分析仪对网络进行调试,最后达到系统阻抗匹配的目的。
According to the maximum power transmission theory, to achieve the maximum transmission efficiency from medium-wave broadcast-transmitter to antennae, the impedance of antenna networks must match that of transmitter. In the medium-wave broadcast-transmitter system, the antenna tuning network is applied to realize impedance matching. The design and maintenance of the antenna tuning network is an important tech- nical part of the medium wave radio transmitters, thus it is of great significance to fully understand the designing and debugging of single frequency medium wave antenna tuning network. In this case, we use the mathematical formula to calculate the parameters of inductance and capacitance, decide their model numbers, and debug the network through network analyzer, and achieve system impedance matching.
出处
《中国有线电视》
2017年第6期726-729,共4页
China Digital Cable TV
关键词
阻抗匹配
网络分析仪
隔直电容
并联谐振
串联谐振
impedance matching
network Analyzer
block condenser
parallel resonant
series resonance
