14 October 2025

RG-11 U/4 F/AP Coaxial Cable: Low Attenuation Guide for Long-Distance Broadcasting

RG-11 U/4 F/AP Koaksiyel Kablo

The RG-11 U/4 F/AP Coaxial Cable is a high-performance coaxial data cable designed for long-distance signal distribution, especially in Cable TV (CATV), Satellite Master Antenna Television (SMATV) systems, and CCTV applications. The RG-11 is known for having one of the lowest attenuation values among coaxial cable standards. This feature allows the cable, under the Delta RG assurance, to be used as a distribution backbone in large buildings, residential complexes, and aerial networks.

In this comprehensive guide, we will examine the technical structure of the RG-11 U/4 F/AP Coaxial Cable, the importance of its 75 Ohm impedance, its low attenuation advantage, and how Deltatema adds value to your projects.


Technical Structure and Standards of the RG-11 Coaxial Cable

The code RG-11 U/4 F/AP explains the fundamental characteristics and purpose of the cable:

  • RG (Radio Guide): Indicates the coaxial cable series.
  • 11: Signifies that the cable has a relatively thick structure with low attenuation at high frequency.
  • U/4: Specifies the structural standard and 75 Ohm impedance.
  • FPE (Foamed Polyethylene): Indicates that the insulation material is physically foamed Polyethylene, which reduces signal attenuation.
  • Shielding (Trishield): Provides high protection against external electromagnetic interference (EMI).
  • AP (Aerial Suspended): Indicates that the cable contains a suspended steel wire, meaning it can be used in external and aerial networks.

75 Ohm Impedance, Attenuation, and Frequency Response

All TV and satellite systems operate with a characteristic impedance of 75 Ohm cable. The 75±3 Ohm impedance value of the RG-11 U/4 F/AP is crucial for transmitting the signal with maximum power and minimum reflection.

  • Low Attenuation: The thick structure of the RG-11 significantly reduces signal loss (attenuation) compared to thinner cables. This makes the RG-11 an ideal choice for the distribution backbone over distances exceeding 100 meters, preserving signal quality as a long-term investment.
  • Frequency Response: The thickness of the RG-11 allows it to maintain signal strength even at frequencies above 1000 MHz.
RG-11 U/4 F/AP Coaxial Cable

RG-11 Coaxial Cable Areas of Use

The primary purpose of the RG-11 U/4 F/AP Coaxial Cable is long-distance distribution requiring low signal loss.

  1. Central Antenna and Satellite Systems (SMATV/CATV): It is the main trunk cable for CATV SMATV systems.
  2. External and Aerial Networks: Thanks to the suspended steel wire, it is used safely in aerial installations between poles and in long-distance external connections between buildings.
  3. HFFR Option: For fire safety in confined areas with high human occupancy, HFFR (Halogen-Free) jacketed coaxial cables from 2M Kablo should be preferred.

Deltatema Assurance and Expert Selection

With our Delta RG assurance, we don’t just supply the RG-11; we also help you choose the correct jacket material based on your project’s needs.

  • Rigidity and Installation: Due to the thickness of the RG-11, attention must be paid to bending radii. Our experts also offer consulting services on suitable cable support systems to prevent installation errors.
  • Technical Support: We supply RG-11 products and provide support for the integration of these coaxial cables with the fiber optic backbone.

Conclusion

The RG-11 U/4 F/AP Coaxial Cable is indispensable for projects requiring low attenuation in long-distance TV and satellite distribution. As a member of the Delta RG family, this cable guarantees a long-term investment through both its technical performance and external durability.


External Links and Technical Resources

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