Figure 7 Comparative plot of simulated and measured reflection
coefficient (S11/S22)
Figure 8 shows the variation of simulated and measured and transmission
coefficient (S21/S12) with respect to
the frequency. Isolation is a positive quantity and can be calculated
using Equation (14).
\(Isolation=-10\log_{10}\left|S_{21}\right|^{2}\) (14)
A good port-to-port isolation (S21/S12 ≤
-16.8 dB (simulated) and S21/S12 ≤ -19.3
dB (measured)) is achieved for the entire operational band from
4.395-10.184 GHz.