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Two Small Helical Antennas for 2 Meter


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 12 Jul 2024


Helix Antennas Links

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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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