28/38 GHz Dual-band Dual-polarized Highly Isolated Antenna for 5G Phased Array Applications

Abstract

This paper proposed a new dual-band dual-polarized array antenna operating at 28 GHz and 38 GHz for 5G communication applications. Three stacked patches are adopted to achieve the dual-band operation. The lower band from 27.48 to 28.50 GHz is achieved by using the lower large patch, which is couple-fed by the middle patch. While the upper band from 36.94 to 40.43 GHz is achieved by using the middle and upper patches. The two patches resonant at 38 and 40 GHz respectively and the two resonant modes coupled together, which greatly enhances the upper band. To increase the polarization isolation in the lower band, a shorting pin connecting the lower patch and ground is utilized. Taking advantages of the multi-layer technology, the position of the vertical feeding probe between the middle patch and lower patch is slightly shifted to ensure the good impedance matching in both lower band and upper band. For the antenna element, the simulated-12 dB bandwidths are 27.48-28.50 GHz and 36.94-40.43 GHz for the two bands, respectively. The in-band gains are over 6 dBi in the lower band, and over 4 dBi in the upper band. For the 2×2 antenna array, the isolations are better than 20 dB in both bands.

A mmW Broadband Dual-Polarized Dielectric Resonator Antenna Based on Hybrid Modes

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“…Higher bandwidths exceeding 20% can be achieved by using a parasitic patch antenna concept [7]. This solution can also be applied for dualband designs [8], [9]. In this case, a multilayer PCB process is required.…”

Design of a 2×2 dual band 28/38 GHz MIMO antenna in millimeter band for 5G

“…Ashraf et al [12] deals with creating AiP-type antennas that operate within the 28 GHz and 38 GHz frequency bands; this antenna has gains of 4 dBi and 6 dBi, respectively, and two bandwidths of 1.02 GHz and 3.49 GHz, respectively. Thus, Chu et al [13] aims to compactly create an antenna fed by means of or near the coplanar waveguide (CPW). In this case, it was installed on a roger RT5880 mount, whose dimensions were 5×5 mm 2 with a thickness of 0.254 mm, and its maximum gain reached 6.6 dB at 28 GHz.…”

A multi-band MIMO antenna system with coupled-fed modified rectangular patch elements for 5G systems

“…The work of [17] is concerned with the dual band (28/38 GHz) which gives the duality by the main radiator being etched by an inverted u-shaped slot. The work of [18] adopts three stacked patches to work in the dual band (28/38 GHz). In [19], a MIMO antenna system is designed to serve the fourth generation (4G) with a bandwidth of 2 GHz and 5G bands of (28, 37 and 39 GHz) on a single antenna.…”