Performance Comparison of Coplanar /Micro strip Antenna for X-band, S-band and C-band Applications Using Coplanar Waveguide (CPW) Feed Technique
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Date
2017-06
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Publisher
AAU
Abstract
Merits of planar antennas make them a potential candidate for the field of communication in
Microwave application. This thesis presents performance comparison of Coplanar /Micro strip
patch Antenna for microwave X-band, S-band and C-band applications using coplanar
waveguide feed technique. As coplanar waveguide feeding has wider bandwidth and high
radiation efficiency it could be applicable in many X- band, S-band and C- band applications.
The substrate applied in the design process for both coplanar and microstrip patch antenna is
FR4 Epoxy Glass, which has relative permittivity of 4.4 and substrate height 1.6mm. Antenna
measurements such as, bandwidth efficiency, radiation pattern and radiation efficiency are
conducted and the performances are compared. Antenna simulations have been performed by
using Ansoft HFSS TM V13.0, which is a Finite Element Method (FEM) based electromagnetic
solver. Simulation results are presented in terms of Resonant Frequency Return Loss, Radiation
Pattern and the antenna Gain.
It has been found that microstrip patch antennas have lower return loss and are more directive
than coplanar patch antenna. The simulated results have also shown that coplanar patch antennas
have high radiation efficiency and comprises of a wider bandwidth as compared to a microstrip
patch antennas. The radiation efficiency obtained for microstrip patch antenna ranges from
82.342% to 89.231% and that for coplanar patch antenna is 92.31% to 98.78%. Meanwhile, the
directivity for microstrip patch antenna ranges from 5.352dB to 7.65dB and that for a coplanar
patch antenna is 2.79dB to 5.69dB.
Description
Keywords
Coplanar patch antennas, Microstrip patch antennas, gain, return loss, inset