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.

KuBAND-LNB-0A0B

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)
  • Polarization: Linear or Circular
  • Extended Ku-Band:
  • Input Frequency: 12.25 to 12.75 GHz
  • Output Frequency: 950 to 1450 MHz
  • LO Frequency: 11.3 GHz
  • Polarization: Linear or Circular

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

BandInput Frequency RangeOutput Frequency RangeLO Frequency(s)Polarization
C-Band3.7 – 4.2 GHz950 – 1450 MHz5.15 GHzLinear
Ku-Band10.7 – 12.75 GHz950 – 2150 MHz9.75 / 10.6 / 10.75 GHzLinear / Circular
Extended Ku-Band12.25 – 12.75 GHz950 – 1450 MHz11.3 GHzLinear / Circular
Ka-Band18.3 – 22.2 GHz950 – 2150 MHz19.2 / 20.2 / 21.2 GHzLinear
X-Band7.25 – 7.75 GHz950 – 1450 MHz6.3 GHzLinear
S-Band2.5 – 2.7 GHz950 – 1150 MHz1.55 GHzLinear

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.