Two Small Helical Antennas for 2 Meter
- The two turn 2 meter base-station λ/2 helix. Height is 6 inches, diameter is 6 inches
post 07 May 2025
Helix Antennas Links →
Helix calculator
Sophisticated Helix Antenna Design,with matching Coax to 50 Ω
Illuminate an offset parabola 80 cm
CM Helix, SatNOGS, v4, CM Frequency: 434 MHz, CM Wavelength: 691 mm, CM c=299792458 m/s, CM Radius = 110 mm, CM Turns: 8
MHz Helical Antenna
I decided to build a pair of helical antennas, one for each circular sense. Helical antennas have broad bandwidth, loose construction tolerances, and for 900 MHz, wouldn't be too big
New Helix Antenna Design
Reflector Loop Dia: 10.66" The reflector is positioned 0.375" ahead of the start point of the first helix turn, first 4 Turns: 10.32", Next 7 Turns: 8.68", Last 12 Turns: 8.40
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Sophisticated Helix Antenna Design,with matching Coax to 50 Ω
CM Helix, SatNOGS, v4, CM Frequency: 434 MHz, CM Wavelength: 691 mm, CM c=299792458 m/s, CM Radius = 110 mm, CM Turns: 8
I decided to build a pair of helical antennas, one for each circular sense. Helical antennas have broad bandwidth, loose construction tolerances, and for 900 MHz, wouldn't be too big
Reflector Loop Dia: 10.66" The reflector is positioned 0.375" ahead of the start point of the first helix turn, first 4 Turns: 10.32", Next 7 Turns: 8.68", Last 12 Turns: 8.40
Helix Antennas Links →
2m-70cm-quadrifilar-helical-antenna
Build a pair of QHAs, one for 2 meter and one for 70 cm. A diplexer is of course needed to connect both to the single antenna connector of a dualband radio
2.4Ghz Helix antenna
Antenna especially for frequencies in the range 2 - 5 GHz this design is very easy, practical, and, non critical
2400 MHz Helix Antenna
This antenna is easy to build and suitable for broadband work, satellite work and terrestrial work
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Build a pair of QHAs, one for 2 meter and one for 70 cm. A diplexer is of course needed to connect both to the single antenna connector of a dualband radio
Antenna especially for frequencies in the range 2 - 5 GHz this design is very easy, practical, and, non critical
This antenna is easy to build and suitable for broadband work, satellite work and terrestrial work
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