Radio - A brief information and history

With the help of a radio, it is possible for people to convey their messages from one place to the other without any problems or issues. This is done with the help of the radio waves which allow the messages to be released into free space and thus even though they could not be heard or seen by human beings, if a radio is available within the room of the person, these signals and messages could easily be picked up through it. It was in the year 1900 that the human voice was successfully transferred through radio in a wireless form by Roberto Landell de Moura of Brazil. Since then, there have been various other changes that have taken place, allowing radio to be one of the most popular modes of communication even today, after almost a century has been passed since its invention.

What is a two-way radio?

Mostly people are aware of radio as a device through which they can get to receive information but they are unable to send back the information through it. However, this does not mean that information cannot be transferred to and from the radio from one person to the other. A two-way radio is a device, which does not only allow the person to receive information through it but also be able to transmit or send out information through this device as well. This is done if the radios being used are similar in their features and operations and have the same radio frequency. One of the most common and mostly used examples of a two-way radio is the walkietalkies, which are also known as hand-held radios and could allow immediate transfer of information to take place.

Is there still a scope for them today?

People might think that the demand for two-way radios might be falling due to the other alternatives that are now available such as mobile phones and internet but this is not the case. Even though there are various mobile companies which try to minimize their costs of calling so that people continue to use their phones to call their loved ones but they still want to make use of technology that can further increase their demand. This is also one reason why now even mobile phones are trying to include the two-way radio technology so that people can face less talk time charges by only paying the cost for the radio and the frequency license that they will make use of.

Channel frequencies in two-way radio

The frequencies of these radios may vary from one location and one country to that of the other. If the frequency is preselected, it is easier for the person to simply choose it by a push of a button. There are however, different factors that might affect the type of frequencies used. Some of these factors include government licensing and regulations, local congestion, geographical location as signals might be hindered in most of the northern places and even the presence of committees that might approve or disapprove of the frequency.