请教下把balun有isolation的效果吗？

应该没有哦
插损很小，又是无源的。

我看到资料上写有isolation16dB的效果，感到很疑惑 - -！

资料上指的可能是    共模抑制    或者是  回波损耗
仔细看资料应该能清楚

可能是指两个输出端之间的隔离

of course not。

这里的隔离是指两个差分端口的隔离，并非隔离器的方向性的隔离

generally, the bulan is used to change between balance and imbalance. in a bulan, one pair of terminals is balanced, that is, the currents are equal in magnitude and opposire in phase. the isolation of balun is the isolation of the two banlance ports.