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. 2020 Sep 13;11(9):851.
doi: 10.3390/mi11090851.

Low Cost AIP Design in 5G Flexible Antenna Phase Array System Application

Wei-Shin Tung  1 , Wei-Yuan Chiang  2 , Chih-Kai Liu  1 , Chiung-An Chen  2 , Pei-Zong Rao  1 , Patricia Angela R Abu  3 , Wan-Ming Chen  1 , Faisal Asadi  2 , Shih-Lun Chen  4
Affiliations

Low Cost AIP Design in 5G Flexible Antenna Phase Array System Application

Wei-Shin Tung et al. Micromachines (Basel). .

Abstract

In this paper, a low cost 28 GHz Antenna-in-Package (AIP) for a 5G communication system is designed and investigated. The antenna is implemented on a low-cost FR4 substrate with a phase shift control integrated circuit, AnokiWave phasor integrated circuit (IC). The unit cell where the array antenna and IC are integrated in the same plate constructs a flexible phase array system. Using the AIP unit cell, the desired antenna array can be created, such as 2 × 8, 8 × 8 or 2 × 64 arrays. The study design proposed in this study is a 2 × 2 unit cell structure with dimensions of 18 mm × 14 mm × 0.71 mm. The return loss at a 10 dB bandwidth is 26.5-29.5 GHz while the peak gain of the unit cell achieved 14.4 dBi at 28 GHz.

Keywords: 28 GHz antenna; antenna in package; phase array antenna.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
The structure of the patch antenna with air cavity.
Figure 2
Figure 2
(a) Top view and (b) cross section view of the patch antenna.
Figure 3
Figure 3
(a) The return loss and (b) the radiation efficiency of the patch antenna.
Figure 4
Figure 4
Beam steering/scanning antenna array [24].
Figure 5
Figure 5
The structure of proposed array antenna with phasor IC.
Figure 6
Figure 6
Directivity as a function of antenna spacing for a broadside array of isotropic elements [25].
Figure 7
Figure 7
Four (4) ports return loss of the simulation.
Figure 8
Figure 8
Radiation pattern of the simulation (X Cut).
Figure 9
Figure 9
Radiation pattern of the simulation (Y Cut).
Figure 10
Figure 10
Antenna peak gain.
Figure 11
Figure 11
Simulation results of the beam steering pattern at 28 GHz (X-cut).
Figure 12
Figure 12
Simulation results of the beam steering pattern at 28 GHz (Y-cut).
Figure 13
Figure 13
Manufacturing process of the antenna with an air-filled cavity.
Figure 14
Figure 14
Photograph of the array antenna (2 × 2).
Figure 15
Figure 15
Comparison of the simulation and empirical results of the return loss of each patch, (a) return loss of Patch1; (b) return loss of Patch2; (c) return loss of Patch3; (d) return loss of Patch4.
Figure 15
Figure 15
Comparison of the simulation and empirical results of the return loss of each patch, (a) return loss of Patch1; (b) return loss of Patch2; (c) return loss of Patch3; (d) return loss of Patch4.
Figure 16
Figure 16
NSI-700S-360 antenna chamber, (a) instrument diagram; (b) equipment setup [26].
Figure 17
Figure 17
Measurement coordinates.
Figure 18
Figure 18
Single patch antenna gain (X-cut).
Figure 19
Figure 19
Single patch antenna gain (Y-cut).
Figure 20
Figure 20
Array antenna (2 × 2) gain measurement results (phase 0/180/180/0, X-cut).
Figure 21
Figure 21
Array antenna (2 × 2) gain measurement results (phase 0/180/180/0, Y-cut).
Figure 22
Figure 22
3D radiation pattern of the array antenna at 28 GHz: (a) simulation result and (b) measurement result (normalized).
See this image and copyright information in PMC

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