Design of dual-band circularly polarised array antenna package for 5G mobile terminals with beam-steering capabilities

• Published in: IET microwaves, antennas & propagation antennas & propagation, 2018-01, Vol.12 (1), p.29-39
• Main Authors: Mahmoud, Korany R, Montaser, Ahmed M
• Format: Article
• Language: English
• Subjects: 5G mobile communication; 5G mobile terminals; antenna phased arrays; antenna radiation patterns; beam steering; beam‐steering capabilities; dual‐band circularly polarised array antenna package; fifth‐generation mobile phone applications; frequency 28 GHz; frequency 38 GHz; good matching impedance; linear antenna arrays; linear array; mobile phone circuit board; multifrequency antennas; phased‐array antenna; Research Article
• ISSN: 1751-8725; 1751-8733; 1751-8733
• DOI: 10.1049/iet-map.2017.0412

Here, a new design of phased-array antenna for future fifth-generation mobile phone applications is presented. The proposed phased array consists of 12 dual-band circularly polarised antenna elements at 28/38 GHz used to form a linear array in the edges region (top-side, right, and left sides) on a mobile phone circuit board. The measured and simulated results show that the designed antenna element has a reflection coefficient less than −15 dB in the assigned frequency bands of 28/38 GHz with a realised antenna gain of 7.68 and 7.73 dB, respectively. Furthermore, the performance of the array antenna package in the vicinity of user's head–hand has been investigated in this study at different scenarios. The designed array antenna achieved good matching impedance with high isolation between the array elements. Moreover, an acceptable realised gain of 16.85 dB on average with an axial ratio