Wideband Beam-Switchable 28 GHz Quasi-Yagi Array for Mobile Devices

Abstract

The goal of this paper is to propose a new antenna array architecture, that aims to solve the most known limitations of phased antenna arrays, resulting a good candidate for next 5G mobile handsets. The architecture consists of five Quasi-Yagi antennas printed on the short edge of a Roger RO3003 substrate, pointing different directions, and a switch to feed each antenna and steer the beam. Simulations prove that the antenna array can cover the angle of over 180 • with high gain over the frequency range from 26 to 40 GHz. Alternative designs to make the structure more compact further demonstrate the validity of the concept. The optimized corner array of four elements is fabricated and passive and active measurements are performed with the MVG Starlab 50 GHz. The results of the passive measurements are in accordance with the simulations and show that the proposed Quasi-Yagi antenna array has large coverage over the whole bandwidth and peak gain of 8 dBi at 28 and 38 GHz. The active measurements of the array connected to the FEM and integrated in the phone-case further confirm the radiation properties of the switchable antenna array at 28 GHz in a quasi-real scenario.

Fast Power Density Assessment of 5G Mobile Handset Using Equivalent Currents Method

“…shows the 5G mmWave mobile handset mock-up[43] employed in this work. The size of the handset mockup model is 70 mm × 130 mm × 0.76 mm.…”

The Role of Millimeter-Wave Technologies in 5G/6G Wireless Communications

“…The vertically-polarized end-fire antenna elements have been proposed by using SIWs with open ends [92], monopoles with parasitic elements [93], magneto-electric dipoles [94], cavitybacked slots [95], and folded slots [96]. The horizontallypolarized mmWave end-fire antennas for UTs have been realized with Yagi-Uda radiators [97], asymmetrical twin dipoles [98], etc. In contrast, broadside radiators have been less studied, primarily attributed to their limited application due to the radiation angular coverage with respect to the array board.…”

Compact beam‐switchable antenna for mm‐wave 5G handheld devices

“…Owing to the sparser nature of the channel at mmwave the spherical coverage is going to be a critical parameter. For spherical coverage analysis, the parameters like coverage efficiency and total scan pattern have been used [5,6,25,26,33]. In literature the coverage is evaluated by coverage efficiency in terms of gain.…”

“…With this configuration, scanning angle ≥90°, a bandwidth of 2 GHz and a maximum gain equal to 9.3 dBi is achieved. In [26], the architecture consists of a Quasi-Yagi antenna array able to cover an area of 180°. The overall size of this design is 130 mm � 70 mm � 0.762 mm.…”