Wireless Network Concepts

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Added on 2020-02-24

Wireless Network Concepts

Added on 2020-02-24

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Running head: WIRELESS NETWORK CONCEPTSWireless Network ConceptsName of the StudentName of the UniversityAuthor Note

1 WIRELESS NETWORK CONCEPTSTable of Contents1. 1st Answer........................................................................................................................21.1. Yagi...........................................................................................................................21.2 Horn...........................................................................................................................31.3 Cellular Antennas......................................................................................................52. 2nd Answer........................................................................................................................62.1 CDMA and FDMA in wireless networking...............................................................63. 3rd Answer........................................................................................................................84. References......................................................................................................................155. Appendix........................................................................................................................175.1 Answer 3..................................................................................................................17

2 WIRELESS NETWORK CONCEPTS1. 1st AnswerAntennas are the means of coupling a transmitter to a medium. An antenna is anelectromagnetic radiator that creates an electromagnetic field that travels out of the antennatowards the receiving antenna. In the receiving antenna, the electromagnetic wave is convertedinto electrical signals. There are different types of antennas such as Yagi horn and cellularantennas. The comparison among the three antennas are elaborated below (Stutzman & Thiele,2012)- 1.1. YagiYagi is a commonly used directional antenna, which uses several elements to form adirectional array. This antenna is commonly used in communication where the frequency isabove 10 MHZ. The Amateur radio and the citizens band radio operators generally use this typeof antenna. This type of antenna is a basic form of antenna generally with a narrow bandwidth.Yagi antenna are sometimes designed to operate on multiple bands as well (Sun et al., 2013). Figure 1: Representing structure of yagi antenna

3 WIRELESS NETWORK CONCEPTS(Source: Sun et al., 2013)The strength of Yagi antennas are listed below- 1) It is a directional antenna with a 50 to 70 degree beam width. Since the focus is in onedirection only, yagi antenna, they put out relatively higher gain in relation to the multidirectionalantennas, making them ideal for receiving lower strengths signals. 2) The high gain enables the yagi antennas to work in relatively good range. 3) The design of the Yagi antennas filers out almost all the noise associated with thesignal coming from opposite direction. Thus, yagi is a good choice for telecommunication.4) The yagi antennas are easier to mount on vertical towers due to its structure. This givesth yagi an additional benefit. 5) The cost of yagi antenna is generally less than an LP antenna. The weaknesses of Yagi antenna are as follows- 1) Bandwidth of yagi antenna is limited and thus the gain is also limited to 6-9 dB unlessthere is more than one antenna. 2) The performance of yagi antenna degrades, as the user move away from the frequencyrange Yagi is designed for. This is particularly because yagis are based on resonant elements andthus off resonant operations results in increase of SWR. 1.2 Horn

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