Attenuators

Without one, your TV would only feature a handful of channels (none in high-def), the ham radio in your basement

would have even less of an audience, and your Internet connection might still be stuck in the (gasp) dial-up

Semi-Rigid Coaxial Cable

age.

Simply put, coaxial cables keep our worlds wired. Let's take a look at what makes them so important:

So how do they work?

Basically, coaxial cables consist of three interdependent parts: an inner conductor (a copper core), which is

surrounded by a tubular insulating layer (dielectric insulator), which fits snugly just beneath the metallic

tubular conducting shield. The inner conductor and outer conducting shield share the same axis, which is why—you

guessed it—the cables got the name "coaxial."

Boil them down, and coaxial cables aren't very different from most power cords. They're still used to transmit

A/C electric current from a source to a receiver and back again, reversing direction several times each second.

What's the difference?

The primary improvement over other cables exists in the fact that coaxial cables can carry radio frequency

current at a much higher rate with almost no power loss. They achieve this by insulating the core conductor,

grounding the metallic shield, and keeping spacing exactly consistent from end to end, creating loss-free paths

for the radio waves to travel.
Attenuators
Other forms of radio transmission lines sometimes lose power if installed too closely to metal objects (like

metal poles, steel construction elements, or gutters). Coaxial cables also feature better external

electromagnetic interference.

So how does this work in real life?

Insignificant power loss in a normal main electrical cord doesn't usually equal a loss of functionality. But

radio frequency loss essentially equals a loss of content (in other words, that song you love wouldn't sound

quite so harmonious with so many gaps and stutters). The coaxial design, therefore, is critical to application

performance.

So the result is a reliable cable that is spaced properly for its entire length, and one that delivers loss-free

signals to the applications that use them. In real life, this means coaxial cables are excellent for use as

computer network connections, and transmission lines for radio frequency and cable television signals.

How it works
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and removed. (June 2009)
Coaxial cable cutaway
Like any electrical power cord, coaxial cable conducts AC electric current between locations. Like these other

cables, it has two conductors, the central wire and the tubular shield. At any moment the current is traveling

outward from the source in one of the conductors, and returning in the other. However, since it is alternating

current, the current reverses direction many times a second. Coaxial cable differs from other cable because it

is designed to carry radio frequency current. This has a frequency much higher than the 50 or 60 Hz used in

mains (electric power) cables, reversing direction millions to billions of times per second. Like other types of

radio transmission line, this requires special construction to prevent power losses:
If an ordinary wire is used to carry high frequency currents, the wire acts as an antenna, and the high

frequency currents radiate off the wire as radio waves, causing power losses. To prevent this, in coaxial cable

one of the conductors is formed into a tube and encloses the other conductor. This confines the radio waves from

the central conductor to the space inside the tube. To prevent the outer conductor, or shield, from radiating,

it is connected to electrical ground, keeping it at a constant potential.
The dimensions and spacing of the conductors are uniform. Any abrupt change in the spacing of the two conductors

along the cable tends to reflect radio frequency power back toward the source, causing a condition called

standing waves. This acts as a bottleneck, reducing the amount of power reaching the destination end of the

cable. To hold the shield at a uniform distance from the central conductor, the space between the two is filled

with a semirigid plastic dielectric. Manufacturers specify a minimum bend radius to prevent kinks that would

cause reflections. The connectors used with coax are designed to hold the correct spacing through the body of

the connector.
Each type of coaxial cable has a characteristic impedance depending on its dimensions and materials used, which

is the ratio of the voltage to the current in the cable. In order to prevent reflections at the destination end

of the cable from causing standing waves, any equipment the cable is attached to must present an impedance equal

to the characteristic impedance (called 'matching'). Thus the equipment "appears" electrically similar to a

continuation of the cable, preventing reflections. Common values of characteristic impedance for coaxial cable

are 50 and 75 ohms.

Flat coaxial cable is one of the most needed items of house and it is found in every house whether you belong to

any area of the world. Flat coaxial cable is a type of cable which is used to connect electricity to the

Semi-Rigid Coaxial Cable

respective electronic appliance. These cables are made up of thick outer layer of plastic n the inner layer is

made up of aluminum foil. The flat coaxial cable is to hold radio; it is also used for holding variety of

purposes including internet connections, antennas and satellite cable connections.

Moreover these cables are also used for other purposes like when you need to use for telephone purposes, no

doubt flat coaxial cable for telephonic reasons is quite different from the rest of the cables. Flat coaxial

cable can be installed very easily by just knowing the exact way of fixing it to the correct connection wires.

How to install flat coaxial cable?
Attenuators
Flat coaxial cable can be installed if you know the proper steps; today going through this article would enable

you to get to know about the fixing process of the flat coaxial cable. First of all you need to cut the end of

the cable in order to attach with the electronic appliance you are going to switch on by its usage. The end of

the cable must be stripped off efficiently in order to expose the wires completely.
Fold the braided copper wires and remove the plastic over it. Using the pliers just attach the cable with the

connector into the place. You need to ensure that the connection has been placed correctly through any signal,

by switching the light or through any sound.

How to replace the old flat coaxial cable?

Well there are times when you feel damages or cracks in the cable and you want to replace it. Sometimes the

cable gets cracked by coming under the heavy things like the cable wire comes under the table or any other heavy

thing which causes it to break down. This requires you to replace the cable.

Or sometimes due to voltage variations the cable gets fused and causes you to replace the flat coaxial cable.

Disconnect the cable from the appliance, remove the cable and then replace it with anew one.

How to buy flat coaxial cable?

You can buy flat coaxial cable through two apparent ways, the first one is through online ways while the other

mode is through manual routes, The online stores requires you to conduct the web search and then place the order

and manual ways asks you to visit eth shops on your own