promach
Advanced Member level 4
For a reciprocal lossless N -port junction,
1) Why is Pavg = 0.5*[V] t [ I ] * instead of Pavg = 0.5*[V] * [ I ] t or Pavg = 0.5*[ I ] t [V] * ?
2) Why [V] = [Z][ I ] instead of [V] = [ I ][Z] ?
3) If we set all port currents equal to zero except for the nth current , which port will the nth current flow to ? This seems to be related to ports decoupling theorem ?
Note: The following screenshot is from Microwave engineering 4th edition by David Pozar
1) Why is Pavg = 0.5*[V] t [ I ] * instead of Pavg = 0.5*[V] * [ I ] t or Pavg = 0.5*[ I ] t [V] * ?
2) Why [V] = [Z][ I ] instead of [V] = [ I ][Z] ?
3) If we set all port currents equal to zero except for the nth current , which port will the nth current flow to ? This seems to be related to ports decoupling theorem ?
Note: The following screenshot is from Microwave engineering 4th edition by David Pozar