Helix antennas. About frequency bands and signals

Helix antennas are lightweight and relatively expensive antennas for drones. With similar characteristics, a helix antenna will be lighter and more expensive than a patch antenna. Another advantage of helix antennas is their improved performance against reflected signals, which means that these antennas do not require a ground plane.

Let's refresh the information about frequency bands and signals.

• L1 band – includes L1/E1/B1C (1575.420 MHz), G1 (1598.062-1605.375 MHz), and B1I (1561.098 MHz) signals.
• L2 band – includes L2 (1227.600 MHz), G2 (1242.937-1248.625 MHz), L6/E6 (1278.750 MHz), and B3 (1286.530 MHz) signals.
• L5 band – includes L5/E5a/B2a (1176.450 MHz), E5b/B2b/B2I (1207.140 MHz), G3 (1202.025 MHz) signals.
• L2b band – includes G3 (1202.025 MHz), E5b/B2b/B2I (1207.140 MHz), L2 (1227.600 MHz), G2 (1242.937-1248.625 MHz) signals.

Helix 50x18 L1

ELT0124 — an antenna for the L1 band. It receives all frequencies in this band: L1/E1/B1C (1575.420 MHz), G1 (1598.062-1605.375 MHz), and B1I (1561.098 MHz), making it suitable for all single-frequency receivers. Gain: 35dB. Attaches directly to the SMA connector of the receiver board. Weight: 11 grams. Color: black.

Helix 55x25 L1/L2b

This antenna is for L1 and L2b bands. It receives signals:

• L1/E1/B1C (1575.420 MHz)
• G1 (1598.062-1605.375 MHz)
• B1I (1561.098 MHz)
• E5b/B2b/B2I (1207.140 MHz)
• G3 (1202.025 MHz)
• L2 (1227.600 MHz)
• G2 (1242.937-1248.625 MHz)

Gain: 28-30dB.

Suitable for ZED-F9P, ZED-F9R, ZED-F9H, ZED-F9T-00B, LEA-F9T receivers in L1/L2 mode. Not suitable for ZED-F9T-10B, LEA-F9T in L1/L5 mode, and the upcoming F10.

ELT0014 — Attaches directly to the SMA connector of the receiver board. Weight: 17-19 grams. Color: black.

ELT0014W — Same as ELT0014, but white.

ELT0168 — Attaches with four screws, connects with a built-in cable with an SMA connector. Weight: 30 grams. Color: black.

Helix 83x40 L1/L2b

This antenna is for L1 and L2b bands. It receives signals: L1/E1/B1C (1575.420 MHz), G1 (1598.062-1605.375 MHz), B1I (1561.098 MHz), E5b/B2b/B2I (1207.140 MHz), G3 (1202.025 MHz), L2 (1227.600 MHz), G2 (1242.937-1248.625 MHz). Suitable for ZED-F9P, ZED-F9R, ZED-F9H, ZED-F9T-00B, LEA-F9T receivers in L1/L2 mode. Not suitable for ZED-F9T-10B, LEA-F9 T in L1/L5 mode, and the upcoming F10.

The Helix 83x40 differs from the Helix 55x25 in that it has a higher gain of 35dB and a signal-to-noise ratio (S/N) that is a couple of units higher. Unfortunately, the weight is also higher – 35 grams.

ELT0121 — black

ELT0121W — white

Helix L1/L2/L5

These antennas receive signals from all frequency bands: L1/E1/B1C (1575.420 MHz), G1 (1598.062-1605.375 MHz), B1I (1561.098 MHz), L5/E5a/B2 (1176.450 MHz), E5b/B2b/B2I (1207.140 MHz), G3 (1202.025 MHz), L2 (1227.600 MHz), G2 (1242.937-1248.625 MHz), L6/E6 (1278.750 MHz), B3 (1286.530 MHz). Suitable for any dual-frequency receivers.

ELT0152 — dimensions 108x28, gain 33dB, weight 28 grams, color black. Attaches to the SMA connector of the receiver board with an angled mount, which means it can be tilted for transportation or towards the south for better reception.

ELT0167 — dimensions 33x48, gain 35dB, weight 25 grams, color black. Has a 1-meter cable with an SMA connector and a magnetic mount.

ELT0170 — dimensions 40x43, gain 36dB, weight 325 grams, color black. Can be attached to the SMA connector of the receiver board, with three screws, or with a magnetic mount.

© Eltehs SIA 2023