A 100 ohm resistor is connected to a good cable with characteristic impedance of

Question

A 100 ohm resistor is connected to a good cable with characteristic impedance of 50 ohm. The attenuation constant is not zero but 0.2 Np/m at 1 GHz, and the relative permittivity of the cable dielectric is 1.5. If the cable length is 10 m, find the reflection coefficient and return loss at the termination; the reflection coefficient and return loss at the input of the cable; the VSWR at both the terminal and the input of the cable, the input impedance at the input of the cable. Suggest a method to improve the matching of the system.

Explanation / Answer

reflection coe =(zl-zo)/(zl+zo)=(100-50)/(100+50)=.66

VSWR=(1+r)/(1-r)=(1+.66)/(1-.66)=4.8,

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