CSC00240 – Data Communications and Networks||Southern Cross University||Assignment

Added on - 19 Feb 2020

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Running head: WIRELESS NETWORKSWireless networksName of the studentName of the UniversityAuthor Note
1WIRELESS NETWORKSAnswer to question 1:The antennas present in the modern world are used to provide a connection via the use offree space between receiver equipment and its corresponding transmitter equipment. There aremany categories of the antennas present in the modern times. They are:Travelling wave antennas (Helical Antenna, Yagi-Uda Antenna)Microwave Antennas (Planar Inverted-F Antenna, Rectangular Micro strip Antenna,)Reflector Antennas (Parabolic Reflector, Corner Reflector,)Log Periodic antennas (Bow Tie Antenna, Log-Periodic Dipole Array)Wire antennas (Short Dipole Antenna, Dipole Antenna, Monopole Antenna and LoopAntenna)The travelling wave antennas are the first type of antenna. It includes the helical and theYagi-Uda antenna. These types of antennas use a guided media for the transmission of theradiation properties. These types of antennas work via the propagation of the radiationcharacteristics along the axis of the antenna involved (Stutzman, & Thiele, 2012). Theadvantages of this type of antenna are the higher directivity and gain. The less powerconsumption and waste is also another advantage of this type of antenna. However, the lessresistance to noise and less resistance to the atmospheric fluctuations are the disadvantages ofthese types of antenna.Microwave antennas are those types of antenna whose working depends on the use ofmicrowave radiation energy for the transmission and reception of signals (Hamidi et al., 2012).High bandwidth and low interference are included in the advantages of these types of antennaswhile the line of sight requirements for working is the main disadvantages.
2WIRELESS NETWORKSThe reflector antenna works by the use of curved surface reflectors to help focus theradiations on the antenna. The main advantages of this type of antenna are the presence of highbandwidth and gain while the main disadvantages are the sole requirements of reflectors.The use of directional structures and the multi-elements are the specifications of the log-based antennas. Due to change in frequency, the characteristics of operation cause a shift in theactive region leading to transmission and reception (Hancock et al., 2013). The presence ofstable resistance over a range of frequencies and high bandwidth is the main advantages. The lowgain contributes to disadvantages.Wire or linear antennas are based on the presence of two metal rods, which is present toact as the main radiation element in the concerned antenna. The main advantages are the designsimplicity and undistorted output. However, the large size proposes disadvantages.In addition, the main antennas that are used for connection for long range as well asmedium range communications are the directional antennas. The wide ranges of operation are themost required specification, which makes this antenna, type a preferred choice.Answer to question 2:Code Division Multiple Access (CDMA) is a conceptual process, which involves theconcept of multiplexing that is used to enable various signals to utilize an only channel fortransmission or reception. This type of technology is used for the Ultra High Frequency bands(UHF). As the name suggests, the data and the voice signals that are intended for transmissionand reception is separated by the presence of specific codes. These codes are then transmittedusing a much wider range of frequency. The user who is sending the signals is assigned aspecific code, which defines the allotment of a specific portion of the channel bandwidth
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