Guanella 1/9 current balun.
Updated: Apr 26, 2021
Picture:
Schematic:
Input: 3 transmission lines with an impedance of 150 ohms in parallel = 50 Ohms,
Output: 3 transmission lines with an impedance of 150 ohms in series = 450 Ohms.
Picture input Picture Output
Impedance of a transmission line:
Formula:
Impedance = 276 log (2D/d)
Wire diameter (d) = 0.9 mm
Distance (D)= 1.58 mm
To achieve 150 Ohms, you have to tune de distance between de two wires.
This will give you a good return loss result.
Measuring results:
- Return loss:
- Insertion loss:
Picture:
Insertion loss is for two devices!
Insertion loss is for two devices!
Return loss of this steup:
