Low-Noise Block Downconverter (LNB) Frequency List

The Low-Noise Block Downconverter (LNB) is a critical component in satellite reception, converting high-frequency signals from the satellite to lower frequencies that can be processed by the receiver.

Here’s a list of common LNB frequencies used in satellite communications:

Common LNB Frequency Ranges

1. C-Band LNB Frequencies

• Input Frequency: 3.7 to 4.2 GHz
• Output Frequency: 950 to 1450 MHz
• LO (Local Oscillator) Frequency: 5.15 GHz
• Polarization: Linear

C-Band is widely used for satellite television and internet services in areas with high rainfall as it is less susceptible to rain fade.

2. Ku-Band LNB Frequencies

• Standard Ku-Band:
• Input Frequency: 10.7 to 12.75 GHz
• Output Frequency: 950 to 2150 MHz
• LO Frequencies:
  • Low Band: 9.75 GHz (for 10.7 to 11.7 GHz input)
  • High Band: 10.6 or 10.75 GHz (for 11.7 to 12.75 GHz input)

  Ku-Band is popular for direct-to-home (DTH) satellite television and certain types of satellite internet services.

  

  3. Ka-Band LNB Frequencies

  • Input Frequency: 18.3 to 22.2 GHz
  • Output Frequency: 950 to 2150 MHz
  • LO Frequencies:
  • 19.2 GHz (for 18.3 to 19.2 GHz input)
  • 20.2 GHz (for 19.2 to 20.2 GHz input)
  • 21.2 GHz (for 20.2 to 21.2 GHz input)
  • Polarization: Linear

  Ka-Band is increasingly used for high-speed satellite internet services due to its ability to provide higher bandwidth.

  4. X-Band LNB Frequencies

  • Input Frequency: 7.25 to 7.75 GHz
  • Output Frequency: 950 to 1450 MHz
  • LO Frequency: 6.3 GHz
  • Polarization: Linear

  X-Band is primarily used for military, governmental, and weather satellite communications.

  5. S-Band LNB Frequencies

  • Input Frequency: 2.5 to 2.7 GHz
  • Output Frequency: 950 to 1150 MHz
  • LO Frequency: 1.55 GHz
  • Polarization: Linear

  S-Band is utilized for satellite communication in mobile services, including satellite radio and certain regional communication systems.

  Key Points to Remember

  • LO Frequency: The Local Oscillator (LO) frequency is used to mix with the input frequency to produce the lower output frequency, which the receiver processes.
  • Polarization: LNBs can support linear (horizontal and vertical) or circular (right-hand or left-hand) polarization, depending on the satellite signal.
  • Output Frequency: This is the down-converted frequency that the satellite receiver can handle, typically within the L-band range (950 to 2150 MHz).

  Summary Table

  Band	Input Frequency Range	Output Frequency Range	LO Frequency(s)	Polarization
  C-Band	3.7 – 4.2 GHz	950 – 1450 MHz	5.15 GHz	Linear
  Ku-Band	10.7 – 12.75 GHz	950 – 2150 MHz	9.75 / 10.6 / 10.75 GHz	Linear / Circular
  Extended Ku-Band	12.25 – 12.75 GHz	950 – 1450 MHz	11.3 GHz	Linear / Circular
  Ka-Band	18.3 – 22.2 GHz	950 – 2150 MHz	19.2 / 20.2 / 21.2 GHz	Linear
  X-Band	7.25 – 7.75 GHz	950 – 1450 MHz	6.3 GHz	Linear
  S-Band	2.5 – 2.7 GHz	950 – 1150 MHz	1.55 GHz	Linear

  Choosing the Right LNB

  The choice of LNB depends on:

  • The frequency band used by your satellite service.
  • The required polarization type.
  • The specific frequency range of the satellite signal.
  • Your receiver’s capability to process the output frequency.
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