The Novel Microwave Stop-Band Filter

Figure 6

The dependence of the loaded Q-factor on the slot width: (1) 𝑎=9 mm, 𝑏=15 mm, 𝑑=5.5 mm, 𝜀₁=𝜀₂=1; (2) 𝑎=𝑑=9 mm, 𝑏=15 mm, 𝜀₁=1, 𝜀₂=3.78.