A SAR Reduced mm-Wave Beam-Steerable Array Antenna With Dual-Mode Operation for Fully Metal-Covered 5G Cellular Handsets
- Authors
- Bang, Jihoon; Choi, Jae hoon
- Issue Date
- Jun-2018
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Beam-steerable array; fifth generation (5G); fully metal-covered handset; millimeter-wave (mm-wave); specific absorption rate (SAR)
- Citation
- IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, v.17, no.6, pp.1118 - 1122
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
- Volume
- 17
- Number
- 6
- Start Page
- 1118
- End Page
- 1122
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2704
- DOI
- 10.1109/LAWP.2018.2836196
- ISSN
- 1536-1225
- Abstract
- In this letter, a specific absorption rate (SAR) reduced 28 GHz beam-steering array antenna with dual-mode operation for a fully metal-covered fifth-generation (5G) cellular handset is proposed. The proposed antenna consists of two subarrays, each of which has eight rotated slot antenna elements, which are arranged on the upper frame and on the part of the back cover of the handset. The subarrays are selected according to the modes by using a switch. The proposed array demonstrates good reflection coefficients in the frequency band ranging from 27.2 to 28.2 GHz and the mutual couplings between antenna elements are less than 11.8 dB. The proposed antenna has good beam-steering properties and a hemispherical beam coverage for a millimeter-wave (mmwave) 5G cellular handset. The calculated peak SAR values on the head phantom by the proposed structure, for the beam scan angles of 0 degrees and 40 degrees, are 0.53 and 0.88 W/kg, respectively, when the input power of each subarray is 24 dlim.
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