Feeders
1:1 Current Balun
- This is the simplest current balun, consisting of two coils of wire connected as shown
- The coils may use an air core or a ferrite core
- Often a current balun is made by winding coaxial cable into a coil, with or without a ferrite core
- The load impedance is not changed by the balun
- The inductive reactance of the windings prevents common mode currents
from flowing and ensures a balanced output
- The inductive reactance should be 10 times the load
impedance at the lowest frequency of operation