Dual-Polarized mm-Wave Antenna Solution for Mobile Phone

Abstract

This article describes a novel dual-polarized mmwave antenna for mobile phone devices. The mm-wave antenna module consists of a 4-layer PCB, an extra metallic piece acting as a reflector, and four metallic pins. The four metallic pins are placed on the top layer of the PCB acting as an array of vertically polarized monopoles. On the bottom layer an array of horizontally polarized dipoles are fed using microstrip lines. The two middle layers act as ground. Simulations show very good performance in the 27 to 29.5 GHz range. In this frequency range, the horizontally and vertically polarized arrays provide better than-1.5 dB efficiency, and higher than 11.5 dBi realized gain. Also, the reflection coefficient is mostly below-10 dB in the 27 to 29.5 GHz range for each individual antenna element. Beam-steering is possible up to ±35 • for both polarizations with a scan loss below 3 dB.

Evolution of Solutions and Designs for Millimeter-Wave Antennas Compatible With Metal Exteriors of Cellular Phones

“…Small (hybrid) Large [10] ok [11] [12] [18] ok ok Small (invisible) [13] [26] [14], [15] [16], [17] [19], [20] [21] [22] [23]…”

A 5G Enabled Shared-Aperture, Dual-Band, in-Rim Antenna System for Wireless Handsets

“…The use of metal-rimmed antennas as slots has been implemented in mobile antennas to achieve multiband operation [3][4][5]. Dual-polarized, end-fire chain slot antenna array were reported in [4,5,7]. In [3], a large metal ground and an unbroken metal rim was used to achieve multiband operations as 4G (820-960 and 1710-2690 MHz) and 5G (3400-3600 MHz).…”