Question

The value of axial ratio of a 45° linearly polarized EM wave in dB is
1. Infinite
2. 0
3. 1
4. 2

Answer 1

Correct Answer - Option 1 : Infinite

Axial Ratio:

It is defined as the ratio of maximum to the minimum electric field.

Axial Ratio = \( = 20\log \frac{{{E_{max}}}}{{{E_{min}}}}\) 

In the case of linear polarization, EM wave passes through the origin

so E_min = 0

Axial Ratio \( = 20\log \frac{{{E_{max}}}}{{{E_{min}}}} = \infty \)