The fifth-generation (5G) wireless network has received a lot of attention from both
academia and industry with many reported efforts. Multiple-input-multiple-output (MIMO)
is the most promising wireless access technology for next-generation networks to
provide high spectral and energy efficiency. For handheld devices such as smartphones,
2×2 MIMO antennas are currently employed in 4G systems and it is expected to employ
a larger number of elements for 5G mobile terminals.
Placing multiple antennas in the limited space of a smartphone PCB poses a significant
challenge. Therefore, a new design technique using dual-polarized antenna resonators
for 8×8 MIMO configuration is proposed for sub 6 GHz 5G applications. The proposed
MIMO configuration could improve the channel capacity, diversity function, and
multiplexing gain of the smartphone antenna system which makes it suitable for 5G
applications. Different types of new and compact diversity MIMO antennas with Patch,
Slot, and Planar inverted F antenna (PIFA) resonators are studied for different candidate
bands of sub 6 GHz spectrum such as 2.6, 3.6, and 5.8 GHz. Unlike the reported MIMO
antennas, the proposed designs provide full radiation coverage and polarization diversity
with sufficient gain and efficiency values supporting different sides of the mainboard.
Apart from the sub 6 GHz frequencies, 5G devices are also expected to support the
higher bands at the centimeter/millimeter-wave spectrums. Compact antennas can be
employed at different portions of a smartphone board to form linear phased arrays. Here,
we propose new linear phased arrays with compact elements such as Dipole and Quasi Yagi resonators for 5G smartphones. Compared with the recently reported designs, the
proposed phased arrays exhibit satisfactory features such as compact size, wide beam steering, broad bandwidth, end-fire radiation, high gain, and efficiency characteristics.
The proposed 5G antennas can provide single-band, multi-band, and broad-band
characteristics with reduced mutual coupling function. The fundamental characteristics
of the 5G antennas are examined using both simulations and measurements and good
agreement is observed. Furthermore, due to compact size and better placement of
elements, quite good characteristics are observed in the presence of the user and the
smartphone components. These advantages make the proposed antennas highly
suitable for use in 5G smartphone applications. / European Union Horizon 2020 Research and Innovation Programme under grant agreement H2020-MSCA-ITN-2016 SECRET-722424
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/19064 |
| Date | January 2020 |
| Creators | Ojaroudi Parchin, Naser |
| Contributors | Abd-Alhameed, Raed, Noras, James M. |
| Publisher | University of Bradford, Faculty of Engineering and Informatics |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Thesis, doctoral, PhD |
| Rights | <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>. |
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