Re: 3dB power splitter
Hi,
concept of two filters connested to the outputs of power spliter (a hybrid or Willkinson divider) is working, you can get diplexing performance of whole network without any problem. Isolation resistor is taking care of isolation, so out of passband reflection is not doing to much damage.
However, thic concept suffers from not being optimum one for the job! Spliting/combining with a hybrid or a spliter/combiner has inherently 3dB insertion loss due to power splitting + any termal loss involved in spliter + insertion loss of filter. Depending on a frequency this could add up to 3.5-5.0 dB in total!
There is not a successful replacement for a true diplexer- you will have to pay the price!
flyhigh