A load impedance (200 + j0) $$\Omega $$ is to be matched to a 50$$\Omega $$ lossless transmission line by using a quarter wave line transformer (QWT). The characteristic impedance of the QWT required is

A plane electromagnetic wave traveling along the +z-direction, has its electric field given by E_x = 2 cos $$\left( {\omega t} \right)$$ and E_y = 2 cos $$\left( {\omega t + {{90}^ \circ }} \right)$$ the wave is

If a pure resistance load, when connected to a lossless 75-ohm line, produces a VSWR of 3 on the line, then the load impedance can only be 25 ohms.