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Coaxial Cable

Coaxial cable is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield.

Applications:

Coaxial cable is used as a transmission line for radio frequency signals. Its applications include feedlines connecting radio transmitters and receivers with their antennas, computer network (Internet) connections, digital audio (S/PDIF), and distributing cable television signals. One advantage of coaxial over other types of radio transmission cable is that in an ideal coaxial cable the electromagnetic field carrying the signal exists only in the space between the inner and outer conductors. This allows coaxial cable runs to be installed next to metal objects such as gutters without the power losses that occur in other types of transmission lines. Coaxial cable also provides protection of the signal from external electromagnetic interference.

Description:

Coaxial cable conducts electrical signal using an inner conductor (usually a solid copper, stranded copper or copper plated steel wire) surrounded by an insulating layer and all enclosed by a shield, typically one to four layers of woven metallic braid and metallic tape. The cable is protected by an outer insulating jacket. Normally, the shield is kept at ground potential and a signal carrying voltage is applied to the center conductor. The advantage of coaxial design is that electric and magnetic fields are restricted to the dielectric with little leakage outside the shield. Conversely, electric and magnetic fields outside the cable are largely kept from interfering with signals inside the cable. Larger diameter cables and cables with multiple shields have less leakage. This property makes coaxial cable a good choice for carrying weak signals that cannot tolerate interference from the environment or for stronger electrical signals that must not be allowed to radiate or couple into adjacent structures or circuits.

Common applications of coaxial cable include video and CATV distribution, RF and microwave transmission, and computer and instrumentation data connections.

The characteristic impedance of the cable is determined by the dielectric constant of the inner insulator and the radii of the inner and outer conductors. A controlled cable characteristic impedance is important because the source and load impedance should be matched to ensure maximum power transfer and minimum standing wave ratio. Other important properties of coaxial cable include attenuation as a function of frequency, voltage handling capability, and shield quality.

Construction:

Coaxial cable design choices affect physical size, frequency performance, attenuation, power handling capabilities, flexibility, strength, and cost. The inner conductor might be solid or stranded; stranded is more flexible. To get better high-frequency performance, the inner conductor may be silver-plated. Copper-plated steel wire is often used as an inner conductor for cable used in the cable TV industry.

Coaxial Cable

Coaxial Cable Technical Characteristics:

ItemCoaxial Specifications
ConductorSolid copper or Tinned Copper
InsulationPE
ShieldTinned copper or Bonded aluminium polyethylene terephthalate
ScreenTinned copper
OutersheathFlame-retardant-polyvinyl chloride (FR-PVC) or Low Smoke Zero Halogen (LSZH)
Cable CT Coaxial CableSuitable for professional TV and CCTV system installations, including digital, satellite, terrestrial and cable TV.
RG Coaxial Cable URM Coaxial Cable50 or 75 Ohm, suitable for a broad range of applications including low power video, video signal, and broadband signals. Available in Duct Grade or with a LSZH sheath
Coaxial BT3002 16 Way / 8 Way Cable Coaxial RA7000 Equivalent CableManufactured to BT Specifications.

Power Cable

Power cables are used to transmit and distribute electrical energy. Power cables are commonly used in urban underground power grids, power station lead-out lines, power supply within industrial and mining enterprises, and over-the-river transmission lines.

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ZMS Cable have a wide product scope, includes: Power cables up to 500kV, AAC, AAAC, ACSR conductors, ABC Cable,electric wires, instrument cable, telecommunications cable, Stay wires. With advanced manufacture technology, rich human resource and effective management system, we guarantee all products are manufactured strictly in accordance with GB, IEC, BS, NFC, ASTM, DIN standards,etc. Beyond quality control, ZMS have been trying its best to offer much higher standard of services rather than expected.

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All customised cables designed by our cable engineer will be subject to testing to relevant standards and appropriate performance criteria. Bespoke cable testing will be conducted under our CNAS accreditation where appropriate. Where required by industry or application, we can submit for relevant cable certification and cable approval processes. For more information or to discuss possible custom designed cable solutions, please complete an enquiry form, contact our technical experts on the Technical Hotline +86 (0)371 6782 9333, or email:info@zmscable.com

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