Wireless Technology |
Uses of wireless technology
What does wireless technology give to us?
Generally...
Electromagnetic radiation can be used for wireless communications. For example:
Wireless communications can be available all of the time, almost anywhere. They have several advantages including:
Wireless communication has the following advantages:
There are also certain drawbacks associated with the use of wireless networks.
Strong security protocols must be created to secure the wireless signals like WPA and WPA2. Another way to secure the wireless network is to have wireless intrusion prevention system.
- Radio waves are used to transmit television and radio programs.
- Microwaves are used to transmit mobile phone calls.
- Radio stations with similar transmission frequencies can interfere with each other’s signals.
- Microwaves are also used to network computers together, especially laptop computers.
Wireless communications can be available all of the time, almost anywhere. They have several advantages including:
- No wires need to be run through buildings, over ground or underground
- Wireless devices can be portable
Wireless communication has the following advantages:
- Communication has enhanced to convey the information quickly to the consumers.
- Working professionals can work and access Internet anywhere and anytime without carrying cables or wires wherever they go. This also helps to complete the work anywhere on time and improves the productivity.
- Doctors, workers and other professionals working in remote areas can be in touch with medical centers through wireless communication.
- Urgent situation can be alerted through wireless communication. The affected regions can be provided help and support with the help of these alerts through wireless communication.
- Wireless networks are cheaper to install and maintain.
There are also certain drawbacks associated with the use of wireless networks.
- Security Wireless - transmission is more vulnerable to attack by unauthorized users, so particular attention has to be paid to security. See our guide on securing your wireless systems.
- Installation problems - You may suffer interference if others in the same building also use wireless technology or where other sources of radio signals are present. This could lead to poor communication or, in extreme cases, loss of wireless communication altogether.
- Coverage - In some buildings getting consistent coverage can be difficult, leading to 'black spots' where no signal is available. For example, in structures built using steel reinforcing materials, you may find it difficult to pick up the radio frequencies used.
- Transmission speeds - Wireless transmission can be slower and less efficient than 'wired' networks. In larger wireless networks the 'backbone' network will usually be wired rather than wireless.
Strong security protocols must be created to secure the wireless signals like WPA and WPA2. Another way to secure the wireless network is to have wireless intrusion prevention system.
Specifically...
Wi-Fi
The main benefit of using Wi-Fi is lesser usage of wires. This is wireless connection that can merge multiple devices together. Wi-Fi network is particularly useful in cases where is not possible or even unacceptable. Fox example, it is often used in the halls of conferences and international exhibitions. It is ideal for buildings that re-considered architectural monuments of history, as it excludes the wiring cables.
Another advantage can be pretty easy to create a mesh Wi-Fi. To connect a new device to your network, simply turn on the Wi-Fi and do the simple setting in the software. In the case of wire technologies still need to pull the wire. Therefore, many modern offices are switching to this technology. |
Blue tooth
Bluetooth does not require a clear line of sight between the synced devices. This means that the devices need not be facing each other, and it is also possible to carry out transfers when both the devices are in separate rooms. The fact that this technology requires no cables and wires is something that has made it so popular. With so many devices engulfing our lives today, the need for clutter-free technology is becoming more intense. The maximum range that it offers is 100 meters, but this range is not the same for all similar connections. It depends on the nature of the devices and the version that they operate upon. The processing power and battery power that it requires in order to operate is very low. This makes it an ideal tool for so many electronic devices, as the technology can be implemented pretty much anywhere. One major advantage is its simplicity of use. Anyone can figure out how to set up a connection and sync two devices with ease. Moreover, the technology is completely free to use and requires no charges to be paid to any service provider. The chances of other wireless networks interfering with yours are very low. This is because of the low powered wireless signals that the technology adopts, and also because of something known as frequency hopping. |
Infrared
The greatest advantages of infrared are being able to use your own receiver with public transmitters (like in movie theatres) and getting the best sound reproduction. Because of their superior sound reproduction, they are often used movies, plays and musical productions. They may not be the best system for profound hearing losses as they lack the acoustic output (loudness) of FM systems. On the other hand, they also present less risk of injury. Infrared systems are secure systems because the signal will not leave the room. Thus, it is the system of choice for jury deliberations and business meetings that need to protect discussions (e.g., around development of new materials or software). Because light does not transmit through walls, multiple systems can be used within a building. With the exception of high frequency lights and bright sunlight, there are few sources of interference with infrared systems. |
Cellular
The most common example of a cellular network is a mobile phone (cell phone) network. Other than that, radio waves are used to transfer signals to and from the cell phone. Cell towers frequently use a directional signal to improve reception in higher traffic areas. Practically every cellular system has some kind of broadcast mechanism. This can be used directly for distributing information to multiple mobiles |
Microwave
Microwaves cause water and fat molecules to vibrate, which makes the substances hot and thus we can use microwaves to cook many types of food. Microwaves are also used by fixed traffic speed cameras, and for radar, which is used by aircraft, ships and weather forecasters. It also can be used to detect the "echoes" coming back from the objects they hit, and using the time it takes for the echoes to come back to work out how far away the object is. Microwave radiation is used in electron paramagnetic resonance (EPR or ESR) spectroscopy, typically in the X-band region (~9 GHz) in conjunction typically with magnetic fields of 0.3 T. |
References
http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway_pre_2011/energy_home/4_wireless_signals1.shtml
http://www.engineersgarage.com/articles/wireless_communication
http://www.darvill.clara.net/emag/emagmicro.htm
http://en.wikipedia.org/wiki/Microwave#Microwave_uses
http://www.wou.edu/education/sped/wrocc/demyst/sld021.htm
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