Helical Antennas
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Frequently asked questions about products in this category Helical Antennas
A helical antenna is a directional antenna in which the conductor is wound in a spiral shape. This design creates circular polarization of the signal and allows for stable operation with radio channels over long distances. A helix antenna is often used in communication systems where a stable signal in a specific direction is important.
A Helix antenna transmits and receives signals using a helical conductor through which radio waves pass. During operation, the signal is emitted along the helix axis. Due to this design, a helical antenna forms a directional radio signal and can operate over a greater distance.
A Helix antenna can have a gain of approximately 8 to 15 dBi. The value depends on the number of turns and the size of the structure. The longer the spiral, the more strongly the helix antenna concentrates the signal in the direction of operation.
A helical antenna can operate with RHCP or LHCP circular polarization. RHCP stands for right-hand circular polarization, and LHCP for left-hand. For stable operation, a helical antenna must use the same polarization as other equipment in the system.
The number of turns directly affects signal gain. A helix antenna with more turns has a higher gain and a narrower beamwidth. As a result, the signal is concentrated in a smaller sector.
Helical antennas are manufactured for various frequencies depending on their purpose. Most often, a helical antenna operates in the 1.2 GHz, 2.4 GHz, or 5.8 GHz bands. Such frequencies are used in FPV systems, radio communications, and some military systems.
The Helix antenna is often used in FPV ground stations. It is also applied in military communication systems and satellite signal reception. Due to its directional pattern, the Helix antenna is well-suited for long-distance operation.
A Cloverleaf antenna radiates a signal in all directions around itself. A Helical antenna works directionally and concentrates the signal in a specific direction. Because of this, a helix antenna is often used on receiving stations.
FPV systems often use two different antennas. A helix antenna is installed on the ground station for long-range signal reception. A circular antenna operates on the drone, transmitting signals in all directions.
Helix antennas can be purchased in Ukraine at radio equipment and FPV component stores. Such antennas are used in communication and video transmission systems. Before purchasing, you should check the operating frequency, polarization, and connector compatibility.