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ECE 325 - Type of Antennas | Wireless technology

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University of Mindanao

   

Types of Antenna (ECE 325)

   

Added on  2020-03-04

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The below document discusses the different types of antennae. The various types of antenna which have been discussed in this document are the Yagi antenna, Horn antenna, and Cellular antenna. The document also discusses Multiple access protocols/techniques and their types such as CDMA (Code division multiple access) and FDMA (Frequency division multiple access).

ECE 325 - Type of Antennas | Wireless technology

   

University of Mindanao

   

Types of Antenna (ECE 325)

   Added on 2020-03-04

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Running head: ASSIGNMENT Assignment [Student Name Here][Institution’s Name Here] [Professor’s Name Here][Date Here]
ECE 325 - Type of Antennas | Wireless technology_1
ASSIGNMENT2Question 1Type of antennasAntennas: these are devices that propagate electromagnetic signals to or from electroniccircuits using either conducting wires or conducting apertures. These devices are usually atthe forefront of signal reception or end point of signal transmission. Furthermore, based ontheir design structure and propagation pattern, antennas are usually classified into three majorcategories; directional antennas, semi-directional antennas and Omni-directional antennas.Now, directional antennas usually propagate signals in one specific direction which improvestheir gain and directivity properties. Example Yagi Uda (Yagi) and Horn antenna. Semi-directional antennas, on the other hand, have their transmissions restricted in certaindirections. Examples; patch and panel antennas. Finally, Omni-directional antennas thatpropagate signals in all directions. Example cellular antennas [ CITATION MIT04 \l 2057 ].a.Yagi antenna – serving either as a directional or semi-directional antenna, Yagiantenna is one of the most common antenna used in the market having the ability topropagate RF waves in specific direction facilitated by high gains. Applications;Televisions set receivers.StrengthsHigh gains that facilitate long distance transmission.Good directivity because of the design that focuses signals in one specificdirection having a high gain.Simple to design and install, as they are made of simple metallic rods[ CITATIONrad172 \l 2057 ].
ECE 325 - Type of Antennas | Wireless technology_2
ASSIGNMENT3WeaknessesThe gain is limited to 20dB.b.Horn antenna – another good example of directional antennas but with higher gainsand directivity levels. Due to these attributes, horn antennas are used to propagateelectromagnetic signals with high frequencies i.e. UHF (Ultra-high frequenciesranging from 300MHz to 3 GHz). In addition to this, horn antennas are designed witha horn like structure where a significant aperture flares out at the end of the device.Application, transmission of microwaves signals.StrengthsHorn antennas are designed with the attributes of gain and directivity in mind.This outcome is facilitated by their aperture structure that improves their gainstremendously.Secondly, horn antennas can operate with a wide range of frequencies andbandwidth.WeaknessesRequires extended lengths to operate effectively.Complex to design and install[ CITATION Rou17 \l 2057 ].c.Cellular antenna – the only Omni-directional antennas considered in this case, thushas the ability to propagate RF signals in all directions. However, this ability limits itsgains and directivity outcomes [ CITATION Car122 \l 2057 ]. Nevertheless, it’sconvenient for mobile devices thus is used in portable gadgets such as phones, tabletsand even vehicles.Strengths
ECE 325 - Type of Antennas | Wireless technology_3

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