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Recent content by sp2821

  1. S

    What is a reflection coefficient of this circuit?

    Volker, Could you explain why Γ1 is not Γ2*e^(-2jβl) but (Zin-Z1)/(Zin+Z1)
  2. S

    What is a reflection coefficient of this circuit?

    Thanks PlanarMetamaterials, So if I understand correctly, you are implying that Γ1=(Zin-Z1)/(Zin+Z1) and it won't change whether Z1 is an infinitely long transmission line or a discrete resistor. Right? But here's why I got confused. I was studying myself using U of Kentucky's Prof. Jim...
  3. S

    What is a reflection coefficient of this circuit?

    Hello, Can anyone help me understand what is a reflection coefficient of below circuit? I'm certain that Γ2 is (ZL-Z2)/(ZL+Z2) However what is Γ1 (reflection coefficient at Z=-l)? Is it (Zin-Z1)/(Zin+Z1) or Γ2*e^(-2jβl)? Does Γ1 change if Z1 is replaced by a discrete resistor?
  4. S

    Characteristic impedance of a transmission line - why is there a minus sign?

    I didn't mean V-,I- will cancel V+,I+. Both V- wave and I- wave are traveling in -Z direction. So shouldn't Z_0={-(V-)/-(I-)}=(V-/I-)?
  5. S

    Characteristic impedance of a transmission line - why is there a minus sign?

    Hello all, If I understand correctly, characteristic impedance of a transmission line is ratio of forward voltage wave to forward current wave or reflected voltage wave to reflected current wave. It makes sense that Z_0 = (V+/I+). But why is Z_0=-(V-/I-)? I searched for answers online and only...
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