By Guy, de ON6MU
Optimized 10-element UHF Yagi Antenna
The elements diameter
of the antenna may vary between 5...8mm and the dipole diameter
may
vary between 8...12mm (12mm recommended) without the need of
changing anything to the length or spacing.
All elements except the dipole are electrically connected to the
boom and may be mounted on top or through it.
The thickness/diameter of the boom may vary between 10...15mm.
Bazooka tube: 15cm diameter 10mm (for Aircel etc.), 15cm diameter
15mm (for H100, Aircom+ etc.)
Use an isolator type boom (plastic tube, wood, fiberglass) if you
mount the antenna vertical to prevent distorion of the radiation
pattern.
Optimized 6-element UHF Yagi Antenna
The elements diameter
of the antenna may vary between 5...8mm and the dipole diameter
may
vary between 8...12mm (12mm recommended) without the need of
changing anything to the length or spacing.
All elements except the dipole are electrically connected to the
boom and may be mounted on top or through it.
The thickness/diameter of the boom may vary between 10...15mm.
Use an isolator type boom (plastic tube, wood, fiberglass) if you
mount the antenna vertical to prevent distorion of the radiation
pattern.
Pictures and details of
the optimized UHF Yagi antenna
430 Mc to 440 Mhz (420 Mc to 450 Mc @ 1:2 SWR)
Michel
F1SRC and how he made
it:
http://f1src.free.fr/antenne/yagi/yagi_6el_70cm.htm
home made antennas antenne yagi
UHF 430 MHz - 440 MHz
Optimized 4-Element UHF Yagi antenna
de ON6MU
home made antennas antenne yagi UHF 430 MHz - 440 MHz
Check this out:
The elements diameter
of the antenna may vary between 5...8mm and the dipole diameter
may
vary between 8...12mm (12mm recommended) without the need of
changing anything to the length or spacing.
All elements except the dipole are electrically connected to the
boom and may be mounted on top or through it.
The thickness/diameter of the boom may vary between 10...15mm.
HIGHLIGHTED TODAY: