Wilkinson Divider Design Tool
K²=1.0 for equal split (3 dB each), K²=2.0 for 4.77 dB / 1.76 dB unequal split
Design Equations
For an equal-split (3 dB) Wilkinson divider with reference impedance Z₀:
| Element | Formula | Value (Z₀=50 Ω) |
|---|---|---|
| Quarter-wave line impedance | Z₁ = Z₀ · √2 | 70.71 Ω |
| Isolation resistor | R = 2 · Z₀ | 100 Ω |
| Section length | ℓ = λ/4 at f₀ | Freq-dependent |
λ/4 Line Length on Common Substrates
| Frequency | Air (mm) | FR4 εᵣ=4.3 | RO4003C εᵣ=3.55 |
|---|---|---|---|
| 900 MHz | 83.3 | 40.1 | 44.2 |
| 2.4 GHz | 31.3 | 15.1 | 16.6 |
| 5.8 GHz | 12.9 | 6.2 | 6.9 |
| 24 GHz | 3.1 | 1.5 | 1.6 |