Re: Power Divider
Well, let's stick to the original question.
"Can anybody tell me how to choose the Power Rating of Isolation resisters while designing Power Divider?"
Assuming a 0° 2-way power splitter. When operating as a splitter, equal voltage potential appears at end or the resistor, so no power is dissipated.
When operating as a combiner, if you combine 2 signals of equal amplitude and phase, equal voltage potential appears at end or the resistor, so no power is dissipated. So if each signal was 0dBm, they would combine to be 3dBm.
Agian, when operating as a combiner, if you combine 2 signals at 2 different frequencies, half of the power will be dissipated by the isolation resistor. This is due to the 0° phase shift of the resistor and the 180° phase shift of the 2 transmission lines and the power delivered to the load(input). Because of the equal loss through the transmission line and 180° phase difference the signals cancel at the opposite port achieving the isoaltion.
Of course I do not know for what application you power splitter design is for. Is it only used as a power splitter? or will it only combine coherent signals. If it may combine signals of different frequency you need to consider the max power of the signals.
I love you