本文利用网络散射矩阵,初步分析了终端失配的隔离和不隔离功率分配网络扫描时输入反射系数的变化。雷达馈线的功率分配(或相加)网络,一般是用功率分配器来实现的。一般相控阵雷达的接收馈线网络,采用隔离式的功率分配器,这是因为电扫接收阵列天线对副瓣有高的要求。对于收发分开的发射馈线来说,对副瓣要求不高,可用不隔离式的功率分配 In this paper, the network scattering matrix is ​​used to analyze the change of input reflection coefficient when terminal mismatched network is isolated and not isolated. The power distribution (or addition) network of a radar feeder is usually implemented with a power divider. General phased array radar receiving feeder network, the use of isolated power splitter, this is because the electric sweep array antenna has a high demand on the side lobe. For the transmit and receive separate transmit lines, the requirements of the side lobe is not high, can be used not isolated power distribution