短波天馈线宽频段阻抗匹配方式

The broad-band impedance matching method of short wave antenna feeder system

短波天线与馈线阻抗不匹配就会产生驻波。在馈线末端某个区域内,不同频段波长的电压波节点,呈现两个及两个以上相距较近的情况是天馈线系统特有规律,针对这些电压波节点的固有特性,可以合理采用低阻抗匹配频带展宽技术和匹配方式,从而降低天馈线系统阻抗匹配网络的设计难度,同时也减少操作和施工困难,有利于广播传输系统高效、稳定运行。

The standing wave is generated by the mismatch between the short-wave antenna and the feeder impedance.In a region at the end of the feeder,the voltage wave nodes of different frequency bands,and two or more of them are close to each other,which is the characteristic rule of the antenna feeder system.According to the intrinsic characteristics of the node voltage wave,it is reasonable to adopt bandwidth expansion technique and matching method,in order to reduce difficulty of design antenna feeder system impedance matching network,reduce operating and construction difficulties,contribute to radio transmission system efficient and stable operation.