Vertical spacing and phasing reinforce radiation perpendicular to the plane of both dipoles.
Antennas · F1SYH
Lazy H
The Lazy H combines two parallel horizontal dipoles mounted one above the other and connected by a phasing line.
HF
Directive
Deux dipôles phasés
Operating principle
Main characteristics
Typical gain
Environ 5 à 7 dBi
Impedance
Variable selon phasage
Polarization
Horizontale
Difficulty
Avancée
Dimensions and design
Each element is generally near half a wavelength or longer, depending on the version. Vertical spacing is often near half a wavelength.
Construction and tuning
Step 1
Build two identical horizontal elements.
Step 2
Install four supports or a frame.
Step 3
Respect vertical spacing.
Step 4
Build the phasing line.
Step 5
Use balanced feed line.
Step 6
Orient the plane for the required DX directions.
Advantages
- Bidirectional gain.
- Wire construction.
- High efficiency.
- Possible multiband matching.
Limitations
- Large vertical structure.
- Four support points.
- Bidirectional pattern.
- Critical phasing.
History and origin
The Lazy H belongs to the family of wire curtain arrays used to obtain gain from simple elements.
Safety
The support structure must remain stable under the tension of several stacked wires.