Wednesday, 2nd May 2012
We learned about Unbounded Media today. As I mentioned last week, Unbounded Media is also known as Unguided Media. This means that transmission of data is done without any physical conductor or in other words, wireless. When I learned the introduction of Unbounded Media, the first thing came into my mind was Wi-Fi. I can imagine that the data is all over the air and some devices are used to receive the data so that Internet users can online. However, this was only my own perception and I not sure whether it was correct or not before I learned it in advance.
Basically, there are several examples of Wireless Technology such as Terrestrial Microwave, Satellite Communication, Cellular Telephony, Wi-Fi and Radio Frequency.
Chart 1 below shows the differences between these technologies.
The aspects that I am going to compare are based on these questions : -
A.) What are the equipments used?
B.) How does it work?
C.) How is the distance covered for the transmission of data?
|Figure 1.3 : Horn Antenna|
|Figure 2 : Geostationary Satellite|
|Figure 3.1 : Mechanism of Calling from a Phone|
|Figure 3.2 : Mechanism of Calling from a Land Phone to a Mobile Phone|
So, here is the video clip that shows how Wi-Fi works.
Then, here is the classification of Radio Frequency based on different types of radio waves' propagation.
|Table 1 : Different types of Radio Waves Propagation|
That's all, thanks!!