Wireless Technology and Antennas for Engineering -myassignmenthelp

Question: Discuss about theWireless Technology and Antennasfor Engineering Students. Answer: Antennas are categorized based on their performance defined by the "Antennas Performance Parameters" characteristics. These parameters determine the quality, range and other important aspects of the antenna. Based on these parameters, they are grouped into five broad categories depending on their functionality and the different parameters they may have. These groups include Log Periodic Antennas, Wire Antennas, Traveling Waves Antennas, Microwave Antennas and lastly, Aperture Antennas ("Different types of Antennas with Properties and their Working", 2017). The parameters that define the categories of the different types of antennas are Antenna Gain and Directive, Aperture, Bandwidth and Frequency, Polarization and Polar diagram ("Different types of Antennas with Properties and their Working", 2017). To determine the strengths and weaknesses of the different antennas, one must understand these parameters in details. For instance, polar diagram affects an antenna's radiation the most s ignificant parameter of an antenna. For instance, in wire antennas, the effectiveness of radiation transmission from one pole to another depends on the impedance of the given poles. However, this is not the case when it comes to Aperture antennas. Aperture antennas are designed differently, allowing the radiation to be only Omni directional, that is, does not have a single specific direction. Since wire antennas depend on the impedance of two poles for efficiency, there is room for loss of radiation leading to a weaker radiation compared to aperture antennas. Other crucial parameters of antennas are frequency, directive gain, and bandwidth. Frequency refers to numbers of a complete cycle the waves from one end of an antenna completes in one second. Bandwidth is the difference between the highest frequency and the lowest frequency. Bandwidth differs from one type of antenna to another. From the vast characteristics of antennas, it can be seen that although some antennas are stronger and more desirable than others, it is difficult to choose one type of antenna over the other or state with certainty which type will dominate the future. This is because the different types of antennas have different application. One type may be suitable in cellular technology why another is suitable for military communication. CDMA, an acronym for Code Division Multiple Access and Frequency Division Multiple Access, abbreviated by FDMA are technologies in the wireless networking that allow multiple access by multiple users. Although both CDMA and FDMA are capable of carrying digital information, FDMA is considered not effective. Consequently, it is used mostly for analog transmission technology. CDMA focuses on uniquely coding the information before sending it out in small bits. It then uses the code to match another user on the other end. Once it finds a match, it then connects the two users. A good example of the CDMA technology as such used in the CDMA IS-95 standard where an entire 1.225 MHz is shared by many channels using unique 64 Walsh Code. Conversely, in FDMA, a whole bandwidth is divided into different channels before being allocated to different users. An example of the FDMA network is the GSM. Here, the 25 MHz band is divided into 124 RF careers with a bandwidth of 200 KHz each before being si gned to the user. With the similarity of the two networks relying on their wireless, the main difference between the two is entirely on the way they are transmitted. Although the two technologies may be seem so different from each other, there application can be merged to compliment each other. Research is underway to combine the advantages of both technologies to make wireless communication even better. Applications of wireless technologies have gone beyond the basic networking. Often, more and more sophisticated wireless technologies are being used in every aspect of life. It has advanced from data transfer to power transfer. Some of the advanced wireless technologies used today include wireless charging, Wireless sensors, and actuators for tracking energy usage as well as seamless roaming. The future of wireless technology is bright with a possibility of a wide range of applications. However, I consider wireless charging to be the dominant wireless technology of the future. Wireless charging or technically, inductive charging is the recharging of electronic gadgets without using cords. Wireless charging is used through the application of magnetic resonance principles. The technology uses two terminals called Qi sender and Qi receiver within an electromagnetic field. When a current passes through the Qi sender, it generates an electromagnetic field. The magnetic field is received b y the Qi receiver and converted back to AC current for charging (Wireless Charging; How Inductive Chargers Work PowerbyProxi, 2015). Its major application is currently in the phone manufacturing. Wireless charging is an advanced example of the wireless technology which its application is still in its infancy. Consequently, there are still many pitfalls on its way. The current application of wireless charging faces a number of disadvantages which include inefficiency through power loss and slow charging which translates to longer charging time. Despite these challenges, wireless technology has a long way to perfect. Its advantages outweigh its disadvantages which give the possibility to dominate the future of charging. References Antenna Theory Tutorial. (2017).www.tutorialspoint.com. Retrieved 22 August 2017, from https://www.tutorialspoint.com/antenna_theory/index.htm Different types of Antennas with Properties and thier Working. (2017).ElProCus - Electronic Projects for Engineering Students. Retrieved 22 August 2017, from https://www.elprocus.com/different-types-of-antennas-with-properties-and-thier-working/ FDMA Technology.www.tutorialspoint.com. Retrieved 22 August 2017, from https://www.tutorialspoint.com/cdma/fdma_technology.htm FDMA versus TDMA versus CDMA-Difference between FDMA,TDMA,CDMA.Rfwireless-world.com. Retrieved 22 August 2017, from https://www.rfwireless-world.com/Terminology/FDMA-versus-TDMA-versus-CDMA.html Frezza, F. (2017).Introduction to Traveling-Wave antennas. European School of Antennas. Wireless Charging amp; How Inductive Chargers Work PowerbyProxi. (2015).PowerbyProxi. Retrieved 12 April 2017, from https://powerbyproxi.com/wireless-charging/