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 TECHNICAL CHARACTERISTICS:

• Q: Is your company a factory or trading company?

  A: We are factory with our own trading company. Our trade business expands home and abroad.

• Q: When can I get the price?

  A:We usually quote within 12 hours after we get your inquiry. If you are very urgent to get the price, please call us or tell us in your e-mail so that we will regard your inquiry priority.

• Q: How can I get a sample to check your quality?

  A: After price confirmation, you can require for samples to check our quality. Sample is free, but the freight charge should be paid.

• Q: What is Minimum Order Quantity?

  A: Generally, 1000 meters for building wire. For power cable, armored or unarmored, 500 meters.

• Q: Which standards for your products?

  A: We can produce wire and cable according to international standards: IEC, ASTM, BS, DIN, SANS, CSA or as customers’ requirement.

• Q: How about delivery time?

  A: If we have stock, delivery would be very quick. For the newly-produced products, 15 to 25 days for production.

• Q: Payment terms:

  A: Normally 30% paid as prepayment, balance paid before delivery. Or 100% L/C at sight

• Q: What is your packing?

  A: Our electrical cable is using electrical cable wheel for the packing, the wheel can be all steel, steel frame and fumigated wood, or fumigated wooden cases. We are using different packing for different length of the cable, to ensure there will be no problem during the delivery of the products.