Coaxial cables

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1. Presentation on:-Coaxial Cable Enrollment No:-201703100110068 Name: shah sachi Alkeshkumar Chhayyani Krupal Kruti Tailor Course SYBCA(4-sem) Group. No:- Subject name: Computer Networks Subject code: Topic: Coaxial Cable

2. Coaxial Cables

3. Types of Transmission

4. What is Coaxial Cables??? Definition:- Coaxial cable is a type of copper cable specially built with a metal shield and other components engineered to block signal interference. It is primarily used by cable TV companies to connect their satellite antenna facilities to customer homes and businesses. It is also sometimes used by telephone companies to connect central offices to telephone poles near customers. Some homes and offices use coaxial cable, too, but its widespread use as an  Ethernet  connectivity medium in enterprises and data centers has been supplanted by the deployment of twisted pair cabling.

5. Continue….. Coaxial cable received its name because it includes one physical  channel  that carries the signal surrounded -- after a layer of insulation -- by another concentric physical channel, both running along the same axis. The outer channel serves as a ground. Many of these cables or pairs of coaxial tubes can be placed in a single outer sheathing and, with repeaters, can carry information for a great distance.

6. History of Coaxial Cable Coaxial cable was invented by English engineer and mathematician Oliver Heaviside, who patented the design in 1880.The discovery is then fell into obscurity for many years because surely there was nothing to make pass in coaxial cable The real discovery and its actual use dates back to 1929 due to the need for a more efficient and with less interferences conductor for the transmissions of many telephone channels on a single “carrier”. Perhaps none of us have never thought that the develop of radio communications never have been possible without the invention of coaxial cable, It is continuously used in our application that we don’t think about it

7. Working of coaxial Cable Defining that core is connected to positive terminal and use as conductor and outer metallic foil connected to ground also use second conductor and shield for noise

8. Continue…. Data Transmitted through the center core conductor enclosed in insulator. While the outer metallic wrapping serves as:- A second conductor line to ground. A shield against noise.

9. Structure on Construction of Coaxial Cable

10. Construction of Coaxial cables Coaxial Cable contains: Inner Central Core Conductor -A central core conductor of solid or stranded wire usually copper Outer Metallic Conductor Shied - A metal foil enclosed between inner and outer insulator. Inner Insulator- An insulating sheathes which encloses inner core conductor to inner and outer conductor from each other. Plastic Jacket/Cover- Covering the whole cable

11. Structure of Coaxial cable

12. Categories of Coaxial Cable

13. Coaxial Cable Standards & Categories Coaxial Cable are categories by Radio Government(RG). Each RG number are denotes a unique set of specification Including The gauge of the inner conductor. The thickness and type of the inner insulator The Construction of Shield. The Size and type of the outer casing NOTE=> Each cable defined by an RG Rating in adapted for a specialized function

14. Use of Coaxial cable Short coaxial cables are commonly used to connect:- Home video equipment In ham radio setups In measurement electronics. Cable television

15. Use of Coaxial cable They used to be common for implementing computer networks, in particular Ethernet Long distance coaxial was used in the 20 th century to connect Radio networks Television networks Long distance telephone Micro coaxial cables are used in A range of consumer devices Military equipment Ultra-sound scanning equipment Note:-The most common impedances that are widely used are 50 or 52ohms, and 75ohms, although other impedances are available for specific application

16. Coaxial Cable Advantages Disadvantages Coaxial cable is still the most common means of data transmission over sort distance. The advantages are:- They are cheap to make. Cheap to install. Easy to Modify Good Bandwidth Great channel capacity Noise immunity due to law error rate Signals entering the cable can cause unwanted noise and picture ghosting. making it useless. A continuous current flow, even if small, along the imperfect shield of a coaxial cable can cause visible or audible interference. More expensive than twisted pairs and is not supported for network standards Its also has high attenuation, have the need to implement repeaters