Sirio LoRa Base Station Antenna

Sirio LoRa base antenna for 433, 868 and 915 MHz systems

What frequency bands do Sirio LoRa antennas cover?

The HGO 433-868 operates in the 415-465 MHz and 815-890 MHz frequency ranges, requires no tuning and is specified for LoRa 433 and 868 MHz systems. The SO 868-915-2 and SPO 868-915-6 operate from 868 to 915 MHz, allowing use with both 868 and 915 MHz LoRa systems. The SCO-868-4, SCO-868-6, SPO 868-8 and SPO 868-10 operate in the 868-870 MHz range.

Sirio 868 MHz antenna models and gain specifications

The SPO 868-8 provides 5.9 dBd or 8 dBi gain, while the SPO 868-10 provides 8.4 dBd or 10.5 dBi. The SCO-868-4 gain is 2.2 dBd or 4.3 dBi, and the SCO-868-6 provides 4.1 dBd or 6.2 dBi. All four models have 50 ohm impedance and linear vertical polarisation.

• SPO 868-8: 868-870 MHz, 8 dBi, 20 W.
• SPO 868-10: 868-870 MHz, 10.5 dBi, 20 W.
• SCO-868-4: 868-870 MHz, 4.3 dBi, 20 W.
• SCO-868-6: 868-870 MHz, 6.2 dBi, 20 W.

The SPO models have a maximum SWR of 1.3 within the specified band, while the SCO models have a maximum SWR of 1.5. The E-plane -3 dB beamwidth is 13 degrees for the SPO 868-8 and 8.6 degrees for the SPO 868-10. The corresponding values are 32 degrees for the SCO-868-4 and 22 degrees for the SCO-868-6.

Omnidirectional and collinear LoRa base antennas

How are the Sirio SPO 868-8 and SPO 868-10 omnidirectional antennas constructed?

The SPO 868-8 is a 6 x 1/2 lambda collinear antenna, while the SPO 868-10 uses a 10 x 1/2 lambda collinear design. Both use an N female connector with a gold-plated centre contact. Housing and radome materials include fibreglass, PCB, anodised aluminium and nickel-plated brass. Their operating temperature range is -40 C to +80 C, and their protection rating is IP67.

The SPO 868-8 has an approximate height of 1600 mm and weighs 1020 g without the bracket. Its wind load is 53 N at 150 km/h and its wind resistance is 180 km/h. The SPO 868-10 has a height of 2590 mm and weighs 1500 g. Its wind load is 93 N at 150 km/h and its wind resistance is 140 km/h. Both models can be installed on 35-60 mm diameter masts using an FT-5 U-bolt mounting system.

Sirio SCO-868-4 and SCO-868-6 collinear antenna connections

The SCO-868-4 uses a 2 x 1/2 lambda design, while the SCO-868-6 is a 3 x 1/2 lambda collinear antenna. In addition to N male and N female connector versions, variants with a 5 m white low-loss cable and SMA male connector are available. The metal components use a DC-ground design. The protection rating is IP66 and the operating temperature range is -40 C to +80 C.

The SCO-868-4 has a height of 500 mm and the SCO-868-6 has a height of 770 mm. Depending on the model, versions without cable weigh 280 or 330 g, while versions with a 5 m cable weigh 440 or 490 g. With the M-3 mounting system, they can be installed on 35-42 mm diameter masts or on a wall. The N male SCO-868-4 is also specified for direct router connection.

What antenna gain is available for 868 and 915 MHz Sirio LoRa antennas?

Sirio SPO 868-915-6 base antenna for 868 and 915 MHz

The SPO 868-915-6 is a 3 x 1/2 lambda collinear, tuning-free omnidirectional antenna covering 868-915 MHz. Its impedance is 50 ohm, polarisation is linear vertical and maximum power is 20 W. It is available with an N female connector or with a 5 m white low-loss cable terminated with an SMA male connector. Its height is 840 mm, while the version with cable weighs 560 g.

The nominal E-plane -3 dB beamwidth is 23 degrees. The typical radiation pattern shows 24 degrees at 868 MHz and 22 degrees at 915 MHz. The protection rating is IP66, operating temperature is -40 C to +80 C, wind load is 36 N at 150 km/h and wind resistance is 140 km/h. It can be mounted on a 35-60 mm diameter mast or on a wall.

How does the Sirio SO 868-915-2 1/2 lambda dipole differ?

The SO 868-915-2 is a 1/2 lambda dipole covering 868-915 MHz, with 50 ohm impedance, linear vertical polarisation and 360-degree H-plane omnidirectional radiation. Its maximum power is 20 W and its E-plane -3 dB beamwidth is 88 degrees. It is available in N male, N female and 5 m low-loss cable versions with an SMA male connector.

The antenna height is 290 mm. The N male version can be used for direct router installation, the N female version can be mounted on a 35-60 mm diameter mast, while the cable version can be installed on a 35-42 mm mast or on a wall. Its protection rating is IP66, wind load is 14 N at 150 km/h, wind resistance is 200 km/h and operating temperature is -40 C to +80 C.

50 ohm impedance, vertical polarisation and RF power

What specifications define the HGO 433-868 dual-band LoRa antenna?

The HGO 433-868 uses a Multi Band Dipole design with 50 ohm impedance, linear vertical polarisation and omnidirectional radiation. Gain is 2 dBi in the 433 MHz band and 4 dBi in the 868 MHz band, while maximum power is 20 W. The E-plane -3 dB beamwidth is 55 degrees at 433 MHz and 45 degrees at 868 MHz.

Two cable versions are available: a 50 cm or 5 m white low-loss cable terminated with an SMA male connector. Materials include galvanised steel, UV-stabilised thermoplastic material and PCB. Dimensions including the bracket are approximately 335 x 166 x 144 mm and weight is 350 g. Wind load is 36 N at 150 km/h, wind resistance is 200 km/h and operating temperature is -20 C to +80 C. It can be installed on a 25-42 mm diameter mast using a U-bolt or mounted on a wall.

What connectors and cables are available for Sirio LoRa antennas?

N and SMA connectors for Sirio base antenna versions

The SPO 868-8 and SPO 868-10 use N female connectors. The SPO 868-915-6 is available with an N female connector or with a 5 m low-loss cable and SMA male connector. The SO 868-915-2 is available with N male, N female and cabled SMA male connections. The SCO-868 family includes N male, N female and 5 m low-loss cable versions with SMA male connectors, while the HGO 433-868 is supplied with either a 50 cm or 5 m cable terminated with an SMA male connector.

Outdoor mounting, IP protection and wind load

Sirio outdoor antenna installation and mechanical specifications

The SPO 868-8 and SPO 868-10 have an IP67 protection rating. The SPO 868-915-6, SO 868-915-2, SCO-868-4 and SCO-868-6 are rated IP66. Depending on the model, mounting is designed for 25-42 mm, 35-42 mm or 35-60 mm diameter masts, while several versions can also be mounted on a wall. At 150 km/h, the specified wind load is 14 N for the SO 868-915-2, 35 N for the SCO-868-4, 41 N for the SCO-868-6, 36 N for the SPO 868-915-6, 53 N for the SPO 868-8 and 93 N for the SPO 868-10.

Which Sirio LoRa base antenna matches a 433, 868 or 915 MHz system?

Sirio LoRa base antenna advantages and limitations for model selection

Advantages:

• The HGO 433-868 covers both 433 and 868 MHz LoRa bands with one antenna.
• The SO 868-915-2 and SPO 868-915-6 operate from 868 to 915 MHz without tuning.
• Cabled SO, SCO and SPO 868-915-6 versions are available with a 5 m low-loss cable.

Limitations:

• The SPO 868-8, SPO 868-10, SCO-868-4 and SCO-868-6 have a frequency range of 868-870 MHz.
• The cabled SO 868-915-2 version is specified for 35-42 mm mast mounting.
• The HGO 433-868 mast mounting is designed for diameters of 25-42 mm.

The HGO 433-868 can be installed on a wall or mast, while the cabled SO 868-915-2 version can also be mounted on a wall or mast.

What are the most common questions? Sirio LoRa base antenna FAQ

LoRa antenna 433, 868 and 915 MHz - frequently asked technical questions

• Which Sirio antenna covers both the 433 and 868 MHz LoRa bands?
  The HGO 433-868 operates in the 415-465 MHz and 815-890 MHz ranges.
• Which models cover both the 868 and 915 MHz bands?
  The SO 868-915-2 and SPO 868-915-6 have a frequency range of 868-915 MHz.
• What is the gain of the SPO 868-10?
  10.5 dBi.
• What polarisation do these LoRa base antennas use?
  The listed models use linear vertical polarisation.
• What is the maximum RF power?
  The listed models are specified for a maximum power of 20 W.
• Which models have IP67 protection?
  The SPO 868-8 and SPO 868-10 are rated IP67.

The category includes omnidirectional LoRa antennas for 433, 868 and 915 MHz systems.

Summary: Sirio LoRa base antenna technical comparison

Selecting a Sirio base antenna by frequency and installation method

Within the Sirio LoRa base antenna range, the HGO 433-868 is a dual-band model, the SO 868-915-2 and SPO 868-915-6 cover the 868-915 MHz range, while the SCO and SPO 868 models are designed for 868-870 MHz. The listed models share omnidirectional radiation and linear vertical polarisation, while gain, connector type, cable configuration, dimensions, IP protection and mast mounting specifications vary by model.