Antenna tuner
Antenna tuner (aka matching network)
A matching network or antenna tuner may be added to optimize the antenna's impedance match with the feedline and radio equipment. This can help improve signal transmission and reception efficiency.
- Impedance Matching for more info about what impedance is and techniques for matching the impedance between the feedline and the radio.
🛰️ Common Antenna Types & Their Impedances:
| Antenna Type | Typical Impedance |
|---|---|
| Half-wave dipole (free space) | ~72 ohms |
| Half-wave dipole (over ground) | ~50-75 ohms |
| Quarter-wave vertical (with radials) | ~36-50 ohms |
| End-fed half-wave (EFHW) | ~2,500-4,000 ohms |
| Loop antennas | Varies (can be high) |