A 28 GHz 5G Phased Array Antenna with Air-Hole Slots for Beam Width Enhancement

Hojoo Lee,Jaehoon Choi,Sungpeel Kim

doi:10.3390/app9204204

Abstract

In this paper, a 28 GHz fifth-generation (5G) phased array antenna with air-hole slots for beam width enhancement is proposed. The proposed antenna consists of eight dipole radiators on a mobile handset-sized ground with air-hole slots between the two adjacent elements for enhancing the half power beam width (HPBW) in the elevation plane. The dimensions of the proposed antenna are 130 mm × 42 mm × 0.127 mm. The proposed array antenna satisfies a −10 dB reflection coefficient in the frequency range from 27.2 to 29.2 GHz with a peak gain of 10.33 dBi and a side lobe level (SLL) of 13 dB. In addition to its good performance, the proposed antenna has a very wide HPBW (measured) in the elevation plane, up to 219 degree with a scan coverage of ±45 degree in the azimuth plane. The proposed antenna demonstrates excellent hemispheric beam coverage for 5G mobile handset devices and can enable cost-effective mass production.

Highlights

With the rapid development of wireless mobile communication technologies, the demand for higher data rate services has significantly increased over the recent years
Most studies have focused on the high peak gain, the wide reflection coefficient bandwidth, the wide scan angle, or the low side lobe level, which are typical specifications of the phased array antenna for mobile devices [4,5,6]
This paper proposes a phased array antenna for applications operating at

Summary

Introduction

With the rapid development of wireless mobile communication technologies, the demand for higher data rate services has significantly increased over the recent years. A promising technology for utilizing millimeter band communications is the phased array antenna with beam steering capability [3]. Most studies have focused on the high peak gain, the wide reflection coefficient bandwidth, the wide scan angle, or the low side lobe level, which are typical specifications of the phased array antenna for mobile devices [4,5,6]. Such work either has high cost structure [7,8] or beam width which is not wide enough for 5G application [9]

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Conclusion