Wireless technology enables the ability to communicate between two or more separate entities at a
We have within this technology the communications that use radiofrequency (RF), those that use infrared waves (IR), microwaves and even light, as we will see later.
Wireless is a term that describes numerous communication technologies that depend on a wireless signal to send data instead of using a physical medium (often a cable).
In wireless transmission, the medium used is air, through electromagnetic waves, usually radio and microwave. The term communication here not only means communication between people but also between devices and other technologies.
In a very simple way, then we will see the operation in more detail, the wireless technology consists of an emitter of the electromagnetic waves that transmit the encoded information and a receiver that collects the information of those waves, decodes it and receives the information.
The waves travel from the transmitter to the receiver through the air, without the need for a physical medium.
Advantages of wireless communication
- Any data or information can be transmitted faster and with high speed.
- Maintenance and installation is less expensive for these networks.
- You can access the Internet from anywhere wirelessly.
It is very useful for workers, doctors who work in remote areas, as they may be in contact with medical centers.
Disadvantages of wireless communication
- An unauthorized person can easily capture the wireless signals that propagate through the air.
- It is very important to protect the wireless network so that the information can not be used by unauthorized users.
To avoid the disadvantages we need a good Computer Security. In the link you can see the 10 basic rules of gold.
A little history
To reach wireless transmission, we have to go through cable transmission, and Samuel FB Morse established the first commercial cable telegraph service in 1832, but the birth of wireless technology began with the discovery of electromagnetic waves by Heinrich Hertz in the nineteenth century (19).
Hertz made the first wireless transmission in the year 1888 through electromagnetic waves between two points located very close, discovering that electromagnetic waves were able to transmit information from one place to another by air, without using cables such as towards Morse.
At the end of 1890, Guglielmo Marconi established the first commercial radiofrequency (RF) communications with the wireless telegraph 1 km away, 50 years after Morse made its first cable transmission. The Marconi transmission is considered the first transmission of information Real wireless, although there are some scientists who think that it was Nikola Tesla's radio.
Wireless technology has always been preceded by wired technology and is generally more expensive, but has provided the additional advantage of mobility, allowing the user to receive and transmit information while on the move.
Another important impetus for wireless technology has been in the area of broadcasting communications, such as radio, television and direct-broadcast satellite. A single wireless transmitter can send signals to several hundred thousand receivers as long as they all receive the same information.
Today, wireless technology encompasses communication devices as diverse as home openers.
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