Stop antenna interaction – upgrade to a triband stack with separate feed lines.
Installing multiple monoband antennas on the same tower?
There’s a critical issue you can’t ignore: ELETTROMAGNETIC COUPLING BETWEEN ANTENNAS.
When 10m, 15m and 20m beams share the same structure:
- mutual coupling alters impedance
- radiation patterns get distorted
- gain and F/B ratio degrade
The solution: a stacked triband Yagi system with separate feed lines
With a modern tribander like the TRI12 10/15/20 SF triband yagi:
- Full-size elements, no traps → higher efficiency
- Very low SWR without tuning
- Designed for multiband stacking
KEY ADVANTAGE FOR MULTI-OPERATOR CONTEST STATION:
Separate feedlines for each band allow:
simultaneous operation of multiple transmitters
without expensive and delicate triplexers
using only dedicated band-pass filters
REAL WORD EXAMPLE: 2 or more antennas in stack
- Increased gain
- Better vertical radiation control
- No inter-band interaction issues
- cleaned signal
- predictable performance
- CONTEST GRADE STATION SETUP
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