Design and Performance Analysis ofMicro strip patches Array Antennas for Long TermEvolution (LTE)
No Thumbnail Available
Date
2017-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
Micro strip patches antenna are playing an important role in wireless communication systems
because of their many advantages like light weight, low profile, low cost, easy integration with
planar structure and easy fabrication. So, it is verymuch essential to knowall the aspects of micro
strip antennas. The main objective of this thesis is to discuss the design and performance
issues of micro strip patch array antennas. The design issues include micro strip antenna dimensions,
feeding techniques and various polarizationmechanisms whereas the performance
issues include return loss, bandwidth issues directivity and radiation pattern of micro strip
patch array antennas. In this thesis, a micro strip fed patches antenna array for long term
evolution (LTE) application is designed using the MATLAB software. To design it, Standard formulas
are used to calculate different parameters of the antenna. After design the array, some
parameters are varied during simulation to get good performances.The proposed antenna is
designed to work at 2.6GHz frequency band. A fractional bandwidth of 4.25%, which was not
close to the desired 10% and a directivity of 4.66dB were attained single patch antenna. This
may have been brought about by poor impedance matching and a high level of spurious feed
radiation and surface waves. A way of improving the bandwidth, radiation pattern and minimize
the return losswould have been expected for effective communication. To achieve this requirement
we are designed (4x1) rectangular micro strip patch array antennas with micro strip
line feeding based on quarter wave impedance matching technique using Mat lab software.
The performance of the designed antenna is then compared with the single patch rectangle
antenna in term of return loss, Voltage Standing Wave Ratio (VSWR), bandwidth, directivity,
radiation pattern. After carried out computer simulation, rectangular micro strip patch array
antenna offers the highest bandwidth efficiency of (as high as 12.5%), somewhat good directivity
(9.66dB), minimum return loss (as low as -11.5dB) and has good radiation pattern. This
is a fairly high though directivity increase and minimize loss could have been studied through
use of different substrate material and thickness. The array antenna can be fabricate on the
substrate type FR-4 with dielectric constant of 4.4 and thickness of 1.6mm respectively.
Keywords: Rectangular Micro strips Array antenna, long term evolution (LTE), return loss and
micro strip feed line.
Description
Keywords
Rectangular Micro strips Array antenna, long term evolution (LTE), return loss and micro strip feed line