Xingfa currently specifies 8D-FB for RF signal transmission in wireless communication systems, broadcasting equipment, base stations, antennas and related electronic equipment. Xingfa's coaxial cable catalogue also positions 8D-FB for long-distance signal transmission and RF feeder applications.
When evaluating 8D-FB for a project, buyers should confirm the system impedance, operating frequency, required cable length, allowable attenuation, connector compatibility and installation environment. The cable model should not be selected only from the outside diameter or product name.
Conductor | MATERIAL | BC/CCS |
Nom.Dia. | 2.80±0.05 | |
Dielectric | MATERIAL | Foam PE |
Nom.Dia. | 7.80±0.05 | |
Shield 1 | MATERIAL | Al Foil |
COVERAGE | 100% | |
Shield 2 | MATERIAL | Tined Copper |
COVERAGE | 45-95% | |
Jacket | MATERIAL | PVC/PE |
Nom.Thick. | 0.80±0.05 | |
Nom.Dia. | 11.10±0.05 |
Dual-Shield Construction for RF Signal Transmission
Xingfa's published 8D-FB construction combines a 100% aluminum-foil first shield with a tinned-copper braid providing 45–95% coverage.
The foil layer provides continuous shielding coverage, while the braided layer adds a second conductive shield around the dielectric. For projects where interference control is important, buyers should confirm the required braid coverage and shielding construction as part of the purchase specification.
Nominal Impedance(ohm) | 75±3 | |
Nominal Velocity of propagation(%) Nominal Capacitance(pf/m) | 84 | |
82 | ||
Spark Test(VAC) | 2500 | |
SRL(dB) | 20 | |
Attenuation [68°f(20℃)] | Frequency（MHz） | Maximum (dB/100m) |
450 | 8.90 | |
900 | 12.80 | |
1800 | 18.60 | |
2500 | 22.20 | |
Attenuation should be evaluated at the actual operating frequency and cable length of the system. For example, a specification at 900 MHz should be evaluated using the published 900 MHz attenuation rather than a generic “low-loss” description.
For engineering or procurement decisions, confirm the latest datasheet and required cable length with Xingfa before final selection.
| Specification | 5D-FB | 8D-FB |
| Nominal Impedance | 75 ± 3 Ω | 75 ± 3 Ω |
| Conductor | BC / CCA | BC / CCS |
| Conductor Diameter | 1.80 ± 0.05 mm | 2.80 ± 0.05 mm |
| Dielectric | Foam PE | Foam PE |
| Dielectric Diameter | 5.20 ± 0.05 mm | 7.80 ± 0.05 mm |
| Overall Diameter | 7.5 ± 0.05 mm | 11.10 ± 0.05 mm |
| Velocity of Propagation | 84% | 84% |
| Capacitance | 82 pF/m | 82 pF/m |
| 900 MHz Attenuation | 20.00 dB/100m | 12.80 dB/100m |
Both Xingfa 5D-FB and 8D-FB are currently published as 75-ohm foam-PE coaxial cables, but their physical construction and attenuation differ.
8D-FB uses a larger conductor and cable diameter, and Xingfa's current published data shows lower maximum attenuation at 900 MHz than 5D-FB. However, cable selection should also consider routing space, connector compatibility, flexibility, operating frequency and the system's approved cable specification.
For a smaller construction, review the 5D-FB coaxial cable specifications. For projects already specifying 8D-FB, use the published 8D-FB construction and attenuation data as the starting point for technical confirmation.
8D-FB is a foam-dielectric coaxial cable used for radio-frequency signal transmission. Xingfa's current 8D-FB construction is a 75-ohm cable with a 2.80 mm BC/CCS center conductor, dual shielding using aluminum foil and tinned-copper braid, and an approximately 11.10 mm PVC or PE outer jacket.
The larger construction and published attenuation characteristics make it an option to evaluate for wireless communication, broadcast, antenna and base-station installations where RF transmission performance over cable length is an important consideration.
8D-FB should be evaluated when a project requires a 75-ohm coaxial construction for RF signal transmission and the electrical and mechanical characteristics match the system specification.
Before specifying the cable, confirm the following project parameters: operating frequency, cable run length, allowable attenuation, required impedance, connector type, installation space, shielding requirement and environmental conditions.
If an existing design already specifies 8D-FB, confirm compatibility before replacing it with 5D-FB, 10D-FB or another coaxial cable family.
Not sure which coaxial construction fits your project? See Xingfa's coaxial cable selection guide.
Xingfa has manufactured coaxial cable since 1996 and currently reports five coaxial cable production lines with annual output of approximately 200,000 km.
Xingfa also states that it provides OEM and ODM services and can support customized cable projects according to customer requirements.
For an 8D-FB sourcing project, provide the required conductor construction, jacket material, braid coverage, cable length, quantity, target market, packaging and any required documentation so that the specification can be confirmed before quotation.
Xingfa's published quality-control process includes incoming inspection of conductors and jacket materials, in-process dimensional and electrical checks, and final batch inspection before shipment. Electrical checks can include impedance, capacitance and DC resistance, with third-party testing available when required.
For a bulk 8D-FB order, buyers can request the applicable inspection or technical documentation according to the agreed specification.
Xingfa's current coaxial cable catalogue lists UL, CE and RoHS for 8D-FB. Buyers requiring compliance documentation should confirm the applicable certificate, declaration or report for the exact cable construction and target market before ordering.
