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Design of Multi-Mode Antenna Array for Use in Next-Generation Mobile Handsets

Ojaroudi Parchin, Naser; Jahanbakhsh Basherlou, Haleh; Abd-Alhameed, Raed A.

Authors

Haleh Jahanbakhsh Basherlou

Raed A. Abd-Alhameed



Abstract

In this study, a new design of a tri-band multiple-input–multiple-output (MIMO) antenna array is proposed for fifth-generation (5G) cellular systems. Its structure is composed of eight identical planar-inverted F antenna (PIFA) elements placed at different edge corners of the handset mainboard with overall dimensions of 150 × 75 mm2. The PIFA elements and ground plane of the MIMO antenna system are arranged on the back layer of the platform, which makes the design easy to integrate with the handset circuit. For S11 ≤ −10 dB, the radiation elements of the MIMO design operate at the frequency ranges of 2.5–2.7 GHz, 3.4–3.75 GHz, and 5.6–6 GHz covering the long-term evolution (LTE) 41, 42/43, and 47 operation bands, respectively. The array achieves better than 15 dB return loss results across the three operating bands. The presented antenna array not only exhibits multi-band operation but also generates the polarization diversity characteristic, which makes it suitable for multi-mode operation. The proposed antenna array was simulated and experimentally tested. Fundamental characteristics of the proposed design are investigated. It offers three band S-parameters with acceptable isolation and dual-polarized radiation with quite good efficiency and gain results. Besides this, the total active reflection coefficient (TARC) and envelope correlation coefficient (ECC) results of the PIFAs are very low over the bands. In addition, the radiation characteristics of the MIMO antenna in the presence of the user and handset components are studied. Moreover, a new and compact phased array millimeter-wave (MM-Wave) antenna with broad bandwidth and end-fire radiation is introduced which can be easily integrated into the smartphone antenna system. Due to its good performance and simple structures, the proposed smartphone antenna array design is a good candidate for future multi-mode 5G cellular applications.

Journal Article Type Article
Acceptance Date Apr 24, 2020
Online Publication Date Apr 25, 2020
Publication Date 2020
Deposit Date Feb 21, 2022
Publicly Available Date Feb 21, 2022
Journal Sensors
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 20
Issue 9
Article Number 2447
DOI https://doi.org/10.3390/s20092447
Keywords 5G; future handsets; modified PIFA; multi-antenna system; multi-band operation
Public URL http://researchrepository.napier.ac.uk/Output/2840219

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