Performance Analysis of Printed Array Antennas for 5G Mobile Communications
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Date
2021-10
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Addis Ababa University
Abstract
Nowadays with the limited spectrum bands the mobile operators have been challenged
to deliver multimedia applications with higher data rates, low latency and better quality
of service of mobile communications to a growing number of users. This has led to a big
number of inventions and technology advancement in past decades which is the prime goals
of the upcoming 5th generation (5G) mobile networks. The millimeter wave (mmWave) is
a suitable candidate for 5G with its high frequency range from 30 GHz up to 300 GHz.
This thesis aims to design, analyze, simulate and compare the single and array elements
of printed dipole, microstrip patch and planar inverted-F (PIFA) antennas regarding to
their performances at the same operating frequency of 28 GHz using computer simulated
technology (CST) microwave studio electromagnetic simulator. The comparison is based on
simulated results of radiation pattern, gain, directivity, VSWR, return loss and e ciency.
Based on the results obtained 4 1 array antennas have maximum gain and directivity
of 9.87 dBi and 10.12 dBi for printed dipole antenna, 12.09 dBi and 12.37 dBi for microstrip
patch antenna, and 9.79 dBi and 9.812 dBi for PIFA, respectively. The VSWR and return
loss value, respectively, is found to be 2.4 and -7.57 dB for printed dipole array antenna, 1.09
and -27.37 dB for microstrip patch array antenna, and 2.6 and -6.5 dB for array of PIFA.
The radiation e ciency for printed dipole array antenna is -0.248, for microstrip patch
array antenna is -0.275, and for array of PIFA is -0.18. In this regard, the analysis shows
that the microstrip patch antenna is quite capable of achieving the highest performances
and represent an obvious choice for mobile applications. Moreover, to achieve an optimum
design parameter the microstrip patch array antenna is also simulated with varying values
of the substrate height, substrate thickness, patch length and patch width. The e ect of
these parameters on antenna performance is analyzed.
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Keywords
Millimeter Wave, PIFA, Printed Dipole, Patch, CST, 28 GHz, Array Antenna