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A helical antenna is an antenna consisting of a conducting wire wound in the form of a helix. In most cases, helical antennas are mounted over a ground plane. The feed line is connected between the bottom of the helix and the ground plane. Helical antennas can operate in one of two principal modes — normal mode or axial mode. In the normal mode or broadside helix, the dimensions of the helix (the diameter and the pitch) are small compared with the wavelength. The antenna acts similarly to an electrically short dipole or monopole, and the radiation pattern, similar to these antennas is omnidirectional, with maximum radiation at right angles to the helix axis. The radiation is linearly polarised parallel to the helix axis. In the axial mode or end-fire helix, the dimensions of the helix are comparable to a wavelength. The antenna functions as a directional antenna radiating a beam off the ends of the helix, along the antenna's axis. It radiates circularly polarised radio waves.
Multiband Antennas in association with GSE (Global Satellite Engineering) are excited to bring together two very smart satellite based technologies where size, weight and cutting-edge functionality are critical.
Introducing the Topolino Range of Iridium Helical Antennas, along with the world’s smallest, intelligent and scriptable Iridium-based terminal – GSatMicro OEM! The building blocks to satellite enable your unique small form factor and energy efficient solutions…
The Topolino Range of Iridium Helical Antennas – One tiny lightweight machined brass radiator with 4 space saving antenna designs. Based on a circularly polarised dipole each antenna displays excellent axial ratio at low angle elevations, making it ideal for LEO networks.