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 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.
- Central Antenna and Satellite Systems (SMATV/CATV): It is the main trunk cable for CATV SMATV systems.
- 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.
- 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
- IEC Coaxial Cable Standards: https://www.iec.ch/homepage (DoFollow)
- 2M Kablo Official Website: https://www.2mkablo.com.tr (DoFollow)
- Coaxial Cable Technical Article (Ören Kablo): https://www.orenkablo.com/tr/urunler/rg_11_u_4__cu_al_/74 (DoFollow)












