三频共塔Γ型匹配网络设计

Design of Γ Type Matching Network for Three-Frequency Common Tower

为了解决一付铁塔发射3套中波广播节目的问题,采用计算各自频率阻塞网络的L、C值和测量阻塞网络对工作频率的电抗值的方法,设计了3个频率的Γ型匹配网络,通过使用网络分析仪进行单频调试和多频联调,确定匹配元件的电抗值,在实测中3个频率得到了很好的匹配,完全满足三频共塔的技术要求。

In order to solve the problem of transmitting three sets of medium wave broadcasting frequency from one tower, a Γtype matching network with three frequencies is designed by calculating the L and C value of the respective frequency blocking network and measuring the reactance value of the blocking network to the operating frequency. The reactance value of matching elements is determined by single frequency debugging and joint adjustment of network analyzer. These three frequencies are well matched in actual measurement, which fully meets the technical requirements of three-frequency common tower.