RT Journal Article
T1 Virtual antenna array for reduced energy per bit transmission at Sub-5 GHz mobile wireless communication systems
A1 Alibakhshikenari, Mohammad
A1 Virdee, Bal
A1 Mariyanayagam, Dion
A1 Zuazola, Ignacio Garcia
A1 Benetatos, Haralambos Harry
A1 Althuwayb, Ayman A.
A1 Alali, Bader
A1 Xu, Kai-Da
A1 Falcone, Francisco
AB This paper presents an innovative technique to synthesize a virtual antenna array (VAA) that consumes less energy than conventional antenna arrays that are used in mobile communica-tions systems. We have shown that for a specific spectral efficiency a wireless system using the pro-posed virtual antenna array consumes significantly less energy per bit (-3 dB) than a wireless system using a conventional multiple-input multiple-output (MIMO) array. This means the adop-tion of the proposed VAA technology in smartphones, iPad, Tablets and even base-stations should significantly reduce the carbon footprint of wireless systems. The proposed VAA is realized by employing a pair of linear antenna arrays that are placed in an orthogonal configuration relative to each other. This orthogonal arrangement ensures the radiation is circularly polarized. The size of the standard radiating elements constituting the VAA were miniaturized using the topology opti-mization method. The design of the VAA incorporates substrate integrated waveguide (SIW) and metasurface technologies. The function of SIW in the design was twofold, namely, to reduce energy loss in the substrate on which the VAA is implemented, and secondly to mitigate unwanted electro-magnetic interactions between the neighboring radiating elements and thereby enhancing isolation which otherwise would degrade the radiation characteristics of the array. Metasurface technology served to effectively increase the effective aperture of the array with no impact on the footprint of the array. The consequence of SIW and metasurface technologies was improvement in the gain and radiation efficiency of the array. The proposed four orthogonal 4-element VAA covers the entire sub-5 GHz frequency range, and it radiates bidirectional in the azimuth plane and omnidirectional in the elevation plane. Moreover, it is relatively easy to design and fabricate. The proposed VAA has dimensions of 0.96k0 x 0.96k0 x 0.0016k0 at mid-band frequency of 3 GHz. VAA has a measured gain of 25 dBi and radiates with 90% efficiency. The average isolation between the linear arrays constituting the virtual array is better than 27 dB.
PB Elsevier BV
SN 1110-0168
YR 2023
FD 2023-05-15
LK https://hdl.handle.net/10016/39013
UL https://hdl.handle.net/10016/39013
LA eng
NO Dr. Mohammad Alibakhshikenari acknowledges support from the CONEX-Plus programme funded by Universidad Carlos III de Madrid and the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No.801538. The authors also extend their appreciation to the Deputyship for Research & Innovation, Ministry of Education in Saudi Arabia for funding this research work through the project number 223202. Additionally, this work was supported by Ministerio de Ciencia, Innovación y Universidades, Gobierno de España (Agencia Estatal de Investigación, Fondo Europeo de Desarrollo Regional-FEDER-, European Union) under the research grant PID2021-127409OB-C31 CONDOR.
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RD 1 sept. 2024