Coaxial Cable
What Is Coaxial Cable
A coaxial cable is an electrical cable with a copper conductor and an insulator shielding around it and a braided metal mesh that prevents signal interference and cross talk. The core copper conductor is used for the transmission of signals and the insulator is used to provide insulation to the copper conductor and the insulator is surrounded by a braided metal conductor which helps to prevent the interference of electrical signals and prevent cross talk.
Advantages of Coaxial Cable
Low Signal Loss: Coaxial cable has a low signal loss rate; thus, even over long distances, the signal is strong. it is perfect for usage in situations where signals must be sent over great distances, such as cable TV networks.
High Bandwidth: Coaxial cable has a high bandwidth, allowing for the quick and efficient transmission of enormous amounts of data. This makes it perfect for usage in data-intensive applications and high-speed internet connections..
Immune to Interference: Coaxial cable is impervious to interference from outside sources, including radio and electromagnetic interference. This makes it perfect for usage in noisy electrical conditions, like those found next to power lines or in factories.
Versatile: Coaxial cable has many uses, including high-speed internet connections, cable TV networks, and security systems.
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RG58 Coaxial CableCoaxial cable is used as a transmission line for radio frequency signals. Its applications includeAdd to Inquiry -
RG174 Coaxial CableCoaxial cable is used as a transmission line for radio frequency signals. Its applications includeAdd to Inquiry -
RG 59 B/U Coaxial CableApplication:For indoor installation as well as in industrial areas in conduits and cable ducts, forAdd to Inquiry
- Tel: +8615006408062
- Email: cable@renhuicable.com
- Add: Building M7, Jingdong Digital Economy Industrial Park, Cuizhai Street, Start-up Area, Jinan City, Shandong Province, China.
Why Choose Us
Our Company
Our Company
Shandong Renhui Cable Co., Ltd. is founded in 2010, located in Jinan city,Shandong Province, China. The company covers an area of 50 thousand square meters, registered fund of RMB 5 million, has 100 staff and workers. We are a professional cable manufacturer in China.
Our Products
Our products mainly cover low and medium voltage cable, PVC insulated cable, XLPE insulated cable, control cable, communication cable, rubber cable, mine cable, welding cable, ship cable, aerial bundled cable and other related customized cables. These cables are used in Power metallurgy, Oil&Chemical Industry, Power Station, Mine, Port and Architectural Engineering, and other fields.
Sales Market
The products have been sold to many countries and regions in the world, such as Russia, Algeria, Bahrain, Bangladesh, Brazil, Chile, Cyprus, Indonesia, Iran, Malaysia, Oman, Dubai, Pakistan, Philippines, Singapore, Sri Lanka, Tanzania, Yemen, Kenya, Vietnam, Mongolia.
Hardline Coaxial Cable: Hardline coaxial cable's center conductor is made of copper, silver and has a larger diameter when compared to other coaxial cables.
Flexible Coaxial Cable: The flexible coaxial cables are very flexible and the inner conductor is surrounded by a flexible polymer.
Semi-Rigid Coaxial Cable: Semi-rigid coaxial cable uses a solid copper outer sheath with a dielectric of Polytetrafluoroethylene.
Formable Coaxial Cable: It is an alternative to semi-rigid cable, instead of a rigid copper outer sheath a flexible metal sheath is utilized.
Twinaxial Cable: It has two central conductors in the core and a single outer core and dielectric. these cables are best for low-frequency digital and video transmission.
Triaxial Cable: It is also known as Triax. It is very much similar to a coaxial cable but with an additional copper braid added to it, the braid works as a shield and protects from noise. Triaxial cables offer more bandwidth.
Rigid Coaxial Cable: Rigid coaxial cable is made up of two copper tubes supported at cable ends and fixed intervals across the length of the cable using PTFE supports or disk insulators. The rigid coaxial cable cannot be bent. It is mainly used in TV and FM broadcasting systems.
Coaxial cables have concentric layers of electrical conductors and insulating material. This construction ensures signals are enclosed within the cable and prevents electrical noise from interfering with the signal.
The center conductor layer is a thin conducting wire, either solid or braided copper. A dielectric layer made of an insulating material with well-defined electrical characteristics surrounds the wire. A shield layer then surrounds the dielectric layer with metal foil or braided copper mesh.
The whole assembly is wrapped in an insulating jacket. The outer metal shield layer of the coaxial cable is typically grounded in the connectors at both ends to shield the signals and as a place for stray interference signals to dissipate.
Coaxial cable design depends on the control of cable dimensions and materials. Controlling these factors helps create a fixed value for the characteristic impedance of a coax cable. High-frequency signals are partially reflected at impedance mismatches, causing errors.
Characteristic impedance is sensitive to signal frequency. Above 1 GHz, the cable maker must use a dielectric that does not attenuate the signal too much or change the characteristic impedance in a way that creates signal reflections.
Electrical characteristics of coax are application-dependent and crucial for good performance. Two standard characteristic impedances are the following:
50 ohms, used in moderate power environments.
75 ohms, common for connections to antennas and residential installations.
What is Coaxial Cable Used For
Coaxial cable is used by cable operators, telephone companies, and internet providers. They're necessary for applications requiring radio frequency transmissions, such as:
Cable TV
If you have cable TV, coax cables carry video and data from the cable company to your TV. They're also used to connect your television or digital converter box to a personal antenna.
Signal Boosters
Cellular signal boosters use an outdoor antenna, an amplifier, and an indoor antenna to boost cellular signal and deliver it even stronger inside your home, office, or vehicle. Coaxial cables are used to connect the three components. They help bypasses signal blocking material.
Wilson Amplifiers is the leading provider of these devices. Check out our guide on how a signal booster works for more information.
Cable Internet (Copper-Based)
Cable internet uses coax cable to provide your home with internet. The copper-based cable is piped into your house from the cable service provider. Your router or cable modem connects to a coax or ethernet outlet to receive the signal. You can then wire your devices to the router or connect via WiFi for speedy internet access.
Ham Radio
Ham radio is a means for people to communicate over airwaves. Coaxial cable connected to the antenna provides a stronger signal. Ham radios can be set up in the middle of nowhere and do not require internet or cell phone technology.
Basic RF Systems
RF (Radio Frequency) waves are generated when an alternating current goes through a conductive material. Coax cables carry radio frequency signals. They can be used with any RF system.
Coaxial cables are a type of electrical cable that consists of an inner conductor, an insulating layer, a metallic shield, and an outer insulating layer, all arranged concentrically. The central conductor carries the signal, while the metallic shield ensures that the signal remains unaffected by external electromagnetic interference.
Coax Cables Typically Have Two Types Of Shielding: Foil And Braid.
Foil shielding uses a thin layer of aluminum, providing 100% coverage of the cable. It is usually attached to a carrier such as polyester to add strength and ruggedness.
Braid shielding involves braided bare or tinned copper wires, which can achieve up to 95% coverage. It is terminated in the field by crimping or clamping and occasionally soldered.
The shield of a coax cable serves four basic purposes: To keep the desired electrical currents inside, keep the undesired Currents outside, provide a more uniform inner surface to the coaxial conductor, and reduce the effects of noise-induced in neighboring cables or bundles of wires.
Structure of Coaxial Cable
Central Conductor
The central conductor is a solid or stranded wire made of copper or aluminum, serving as the core element for signal transmission. Its size and material choice depend on the specific application and required electrical characteristics.
Insulating Layer
Surrounding the central conductor is an insulating layer, typically made of materials like polyethylene (PE) or polytetrafluoroethylene (PTFE). This layer prevents the central conductor from coming into contact with the metallic shielding, thus maintaining signal integrity and reducing losses.
Metallic Shielding
A metallic shielding layer, often made of copper or aluminum, encases the insulating layer. It serves two primary purposes: first, to protect the central conductor from external interference, and second, to contain and prevent the leakage of electromagnetic fields generated by the signal.
Outer Insulating Sheath
The outer insulating sheath acts as a protective covering for the coax cable, shielding it from environmental factors such as moisture, abrasion, and physical damage. Common materials used for the outer sheath include polyvinyl chloride (PVC) and low-smoke zero-halogen (LSZH) compounds.
Coaxial Cables Electrical Characteristics
Impedance
Impedance is an important factor in coaxial cables, as it refers to the opposition posed to the flow of an alternating current. Coaxial cables generally have an impedance of 50 or 75 ohms, depending on the application. This characteristic impedance is essential to maintain signal integrity and minimize reflections or signal loss.
Attenuation
Attenuation is the reduction of signal strength as it travels through the coaxial cable. This phenomenon occurs due to electrical resistance, dielectric loss, and radiation loss. Longer cable lengths and higher frequencies tend to have higher attenuation values, which can lead to signal distortion if not properly accounted for during cable selection.
Resistance
Resistance in coaxial cables is influenced by the materials used in the inner conductor and the shield. It plays a role in power loss and signal attenuation. In general, lower-resistance materials such as copper are preferred for their ability to minimize power loss and maintain signal integrity.
Inductance
Inductance is the property of coaxial cables that relate to the generation of a magnetic field around the cable as a result of current flow. This magnetic field can lead to signal interference and noise, so minimizing cable inductance is important. A lower inductance value helps to preserve signal integrity at high frequencies.
Capacitance
Capacitance in coaxial cables is a result of the interaction of the inner conductor, the dielectric, and the outer shield. It can affect signal transmission by causing phase shifts and dissipation. Lower capacitance values are desirable in high-frequency applications, as they help maintain signal integrity and minimize distortion.
Dielectric Constant
The dielectric constant of a coaxial cable relates to its insulating material's ability to store electrical energy. A lower dielectric constant results in less signal distortion and attenuation. Common dielectric materials in coaxial cables include air, polyethylene, and Teflon, each with differing dielectric constants and performance characteristics.
Permeability
Permeability refers to the ability of a coaxial cable's shielding to resist magnetic field penetration, which affects signal integrity. The shielding material and configuration can influence permeability. Proper cable shielding is essential to minimize electromagnetic interference and maintain signal quality.
Current Waves
Current waves in coaxial cables are the movement of electrical signals through the cable and are impacted by factors such as impedance, attenuation, and dielectric constant. When current waves encounter a change in impedance or dielectric properties, reflections or signal losses can occur. Ensuring proper cable selection and design helps maintain signal integrity and reduce losses due to current wave interactions.
Both types of cable can be used for carrying video, audio, and other forms of data, and both can offer you distinct advantages and disadvantages in setting up your network.
Deciding which is best for your situation depends on the distance of your connection and the amount of data you will send. Fiber optic cables carry a signal for several miles before needing a repeater. Signal losses are higher in coax cable, so you should use it for shorter distances. Fiber optic cables carry far more information, and it is also more expensive. Fiber optic cables are found less frequently in residential and consumer settings than coaxial cables, but fiber networks continue to grow in networks around the world.
Coax cables are easy to install and very durable. Because fiber has higher and faster data transfer than coax, they are best used for professional networks or multi-dwelling units (MDUs), such as those found within a business campus, university or apartment complex. If you are working on a home installation or medium-capacity data transfer network, then most would choose to install with coax cable.
Regarding the cost of fiber vs. coax, fiber is typically higher upfront with a long lifespan. After installation, the price for dedicated internet access over fiber will also be higher than a shared cable internet connection. It's important to weigh the options before making this critical decision that will impact your network service for the foreseeable future.
How Do I Choose A Coaxial Cable
Choosing the right coax cable involves considering several key factors:
Cable Type And Size
Coax cables come in various sizes and types, denoted by numbers (e.g., 2/12–27). The first number represents the cable's diameter, while the second number indicates the number of shielding layers. Choosing the right size and type is crucial for optimal transmission lines.
Coaxial Cable Connectors
Consider the coaxial connectors required for your specific application. Different devices and systems may use various coaxial cable connector types, so compatibility is essential.
Signal Frequency And Transmission Speed
The frequency of the signals you plan to transmit and the required transmission speed are critical factors. High-frequency signals may require specialized coaxial cables with better shielding to minimize signal loss.
Electromagnetic Interference EMI
Choose coaxial cables designed to reduce electromagnetic interference. For applications where EMI is a concern, choose cables with superior shielding to maintain signal quality.
Coaxial Cable Advantages
Understand the advantages of coaxial cables, such as their ability to transmit RF signals over long distances with minimal signal loss compared to other cable types.
Compatibility with Devices
Ensure the chosen coaxial cable is compatible with your devices and equipment, including TVs, radios, routers, and signal boosters.
Durability and Installation
Consider the cable's durability outdoors or in harsh environments. Additionally, assess the ease of installation to avoid complications during setup.
Cost And Budget
Coaxial cable prices vary significantly depending on the quality and specifications. Establish your budget and ensure it aligns with your specific needs and priorities.
Transmission Line Theory
Coaxial cables are a type of transmission line used for sending electrical signals, specifically high radio frequency (RF) signals, from one point to another with low signal loss. Transmission lines are essential for many applications, such as phone lines, cable TV, internet, and cell signal boosters. The complex impedance of transmission lines, like coaxial cables, can greatly affect signal transmission quality.
Signal Loss
A critical factor in signal transmission via coaxial cables is signal loss. Losses can occur due to a number of reasons, such as cable length, the quality of the dielectric material, and the frequency used. In general, signal loss increases as the length of the cable increases. While coaxial cables can be run for several hundred meters, the quality of the signal may degrade over long lengths.
Frequency and Wavelength
The frequency of the electrical signal being transmitted and its corresponding wavelength also have a significant impact on coaxial cable performance. The phase velocity, which dictates how fast electrical signals travel along a transmission line, depends on the construction of the line.
The electrical length of a conductor with the same physical length can vary depending on the type of transmission line. For example, at a given frequency, different conductors will have different electrical lengths. As a result, choosing the appropriate frequency and cable type is essential to ensure optimal signal transmission over coaxial cables.
How To Splice Coax Cable
If you find yourself needing to splice a coax cable, the process is relatively simple. Follow these steps below:
Gather your materials. You'll need a clean cloth, a coax cable stripper or a sharp knife, two coax compression connectors, a coax compression crimper tool, and a barrel connector.
Determine what type of coax cable you're working with. Coax cables come in different radio grades or radio frequencies. The most common types are RG-6, RG-11, and RG-59.
Make sure both ends of the cable you'll be connecting are clean and dry. This is particularly important if you are working with a broken underground wire. Even if your cables appear clean, it's a good idea to wipe them down with a clean cloth and thoroughly dry them before working on the cables.
Use a coax cable stripper that's compatible with the type of cable you're working with to strip both ends of the cable. You'll need to first strip the outer jackets and then the inner jackets. This will take off the outer layers and expose the wire. If there is any wire mesh left after stripping, fold it back away from the wire.
You can use a knife to strip the cable, but a compatible cable stripper is both safer and easier. With a cable stripper, you'll reduce the chance of damaging the wire, and you'll ensure that it's stripped to the correct length. Of course, for more detailed instructions on stripping, be sure to follow the instructions on your particular stripper.
Put a coax compression connector on each end of the wires you just stripped. If you're connecting two cables together, you'll need two compression connectors. When inserting the connectors, be careful not to damage the wire.
Use a coax compression crimper tool to clamp the compression connectors onto the wires. This helps them stay snug and secure. Once you're done crimping, you shouldn't be able to pull the cable out of the connector.
Use a barrel connector to connect the two cables. Simply screw the barrel connector onto each end.
The Four Types Of Damage That Causes Coax Cables To Go Bad
There Are Four Possible Reasons To Blame For Why Your Coax Cable Has Gone Bad.
Heat Damage
The melting points of coax cables are 150 degrees F. These low melting points mean that a coax cable will go bad when it is near a heat source for a long time. This is because the plastic on the coax cable will melt and the components will shift out of place.
01
Water Damage
Coax cables can go bad due to water damage. Like many electrical-based objects, coax cables are not functional when they are subject to water. Water can affect the electrical wiring of a coax cable.
02
Physical Damage
Coax cables can go bad from physical damage. The outer surface of a coax cable is delicate. Since it is delicate, a coax cable can go bad when you throw them around without a care. You need to keep coax cables in a straight position. Even the slightest bend in a coax cable can break its inner components. To sum up, you should never bend or step on a coax cable or else it will go bad.
03
Connector Damage
Coax cables can go bad from conductor damage. Coax cables have a connector on both ends. Connectors transfer radio waves carrying information from one source to another. if you break either connector on the coax cable, the coax cable is bad. you can replace the connectors on the coax cable and if you choose to do this then the coax cable can still be good.
04
One way that you can check if your coax cables go bad is using an electrical multimeter. An electrical multimeter can measure the abilities of multiple pieces of electronic equipment using many different calculations.
First off, you can use your electronic multimeter to do a resistance check on your coax cable. In this check, the electronic multimeter administers a voltage test of the coax cable's shield and cable components. A resistance test will give you an answer in hectometers, or hms.
Secondly, you can use your electronic multimeter to do a capacitance check. In this check, the electronic multimeter will administer a capacity check of the coax cable's shell and conductor. A capacitance check will tell you calculations in picofarads, of pf.
Lastly, you can use your electronic multimeter to do an inductance check. In this check, the electronic multimeter will administer a capacity check of the coax cable's shield and cable. An inductance check will discuss solutions in nanohenry, or nh and in Ohm.
Our Factory
Shandong Renhui Cable Co., Ltd. is founded in 2010, We are a professional cable manufacturer in China. Our products mainly cover low and medium voltage cable, PVC insulated cable, XLPE insulated cable, control cable, communication cable, rubber cable, mine cable, welding cable, ship cable, aerial bundled cable and other related customized cables. These cables are used in Power metallurgy, Oil&Chemical Industry, Power Station, Mine, Port and Architectural Engineering, and other fields.
FAQ
We're well-known as one of the leading coaxial cable manufacturers and suppliers in China. If you're going to buy high quality coaxial cable with competitive price, welcome to get more information from our factory.
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