Antenna

Zentanode antenna specifications, supported frequencies, performance data, and range optimization.

Supported Frequencies

Zentanode operates on region-specific frequencies for optimal performance and regulatory compliance.

Frequency
Region

868 MHz

Europe, Switzerland, South Africa, UAE

863 MHz

Ukraine, Turkey, Saudi Arabia

865 MHz

India

864 MHz

Russia

902 MHz

US, Canada, Mexico

915 MHz

Asia, Australia

920 MHz

Hong Kong

922 MHz

Latin America, Southeast Asia

470 MHz

China

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Verify the correct MHz specification for your country before purchasing. If you have purchased an incorrect frequency version, contact zentanode.comarrow-up-right for a replacement.


Antenna Performance

Performance characteristics across key frequency bands:

Frequency (MHz)
Gain (dBi)
Efficiency (%)
Beamwidth
VSWR

600

2.63

32.2%

65°

1.5:1

680

2.19

34.3%

70°

1.6:1

760

1.44

40.0%

85°

1.5:1

840

2.31

38.5%

75°

1.6:1

868

2.76

44.1%

60°

1.3:1

915

2.79

45.2%

55°

1.2:1


Key Parameters

Parameter
Description

Gain (dBi)

Ability to focus and amplify signal in a specific direction

Efficiency

Ratio of radiated power to input power

Beamwidth

Angular width of the main radiation lobe

VSWR

Voltage Standing Wave Ratio — lower is better (1.0 = ideal)

Polarization

Linear (all Zentanode frequencies)


Range Estimation

Under ideal line-of-sight conditions, the theoretical range can be estimated using the Friis transmission equation:

Variable
Description
Zentanode Value

Pt

Transmit power

10 dBm

Gt

Transmit antenna gain

3 dBi

Gr

Receive antenna gain

3 dBi

f

Frequency

900 MHz

Pr(min)

Receiver sensitivity

-100 dBm

Result: approximately 8.6 km range under ideal conditions.

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Optimizing Range

  • Placement — Mount the antenna elevated and away from metal objects, walls, and dense foliage. Line-of-sight to other nodes significantly improves range.

  • Node Density — Add more Zentanodes to extend coverage through multi-hop mesh routing. Each node acts as a relay.

  • Cable Quality — Use high-quality, short coaxial cables to minimize signal loss.

  • Grounding — Proper grounding reduces interference and improves performance.

  • Environment — Temperature extremes, humidity, and electromagnetic interference can affect antenna performance.

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