Printed elliptically polarized star dipole antenna
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Date
2018-06
Authors
Muhammad Haziq Ab Mutalib
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Abstract
The increases usage of mobile phone has led to a higher demand on capacity and
bandwidth of a communication system. The latest development of mobile phones has
required a huge amount of data transmission over communication system. By employing
dual polarization multiple-in multiple-out (MIMO) method, it able to improve and offer
high capacity and bandwidth to meet this huge demand. Crossed dipole antenna or known
as STAR dipole antenna which can produce elliptical polarisation was formed where it is
able to improve the orthogonality that required for MIMO multiplexing, thus it will
improve the multiplexing gain over dual linear polarisation. In previous research, dual
elliptically polarised antenna prototype was designed by using copper wire but the
prototype is suitable for demonstration purpose as the design was too large and the results
was unable to be the same as the first design because of the wire specification. This work
therefore aims to design STAR dipole antenna with frequency 2.4GHz in CST software
to form elliptical polarisation and print the antenna design onto substrate and make it
planar structure as it easy to manufactured and more accurate. As the S-parameter, gain
and radiation pattern was characterized, the results concluded that the original STAR
dipole antenna had a slightly higher gain than the printed STAR dipole antenna but
radiation pattern for both printed and original STAR dipole antenna still quite similar
therefore it can be used as substitute to the original antenna.