The DXZone.com Amateur Radio Internet Guide

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Helical Antennas -Theory

Posted:
https://www.dxzone.com/dx33853/helic...as-theory.html

Antennas/Helical
Helical antenna or helix antenna is the antenna in which the conducting
wire is wound in helical shape and connected to the ground plate with a
feeder line. It is the simplest antenna, which provides circularly
polarized waves.

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Taming the Quadrifilar Helical Antenna

Posted:
https://www.dxzone.com/dx33852/tamin...l-antenna.html

Antennas/Quadrifilar Helix
The Quadrifilar Helical antenna provides circular polarization and complete
hemispherical reception, which is precisely what is needed to receive the
polar orbiting weather satellites, and as a 2 meter antenna it will receive
horizontal, vertical and clockwise circular polarization.