Analysis of the effects of antenna substrate composite materials on specific absorption rate

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1 Citation (Scopus)

Abstract

The effects of antenna dielectric substrate materials on the specific absorption rate (SAR) towards the human head are presented in this investigation. The variation of radiation efficiencies of antenna due to different substrate materials are also analyzed and discussed in the close vicinity of head model. An E-shaped planar inverted-F antenna (PIFA) is used as internal handset antenna in this analysis with five different dielectric substrate materials-Bakelite, FR4 glass epoxy, Rogers R04003, Taconic TLC and RT Duroid. Moreover, different thicknesses of each substrate are considered in the experimental setup. The studied cell phone is located beside a specific anthropomorphic (SAM) head phantom in a position of actual handset use. The finite-difference time-domain (FDTD) method with the lossy-Drude model is utilized in this study by using CST Microwave Studio. The SAR values and radiation efficiencies are calculated for two global system for mobile (GSM) frequency band at 900 MHz and 1800 MHz. The results show that the SAR values are affected due to the variation of substrate materials and its thickness. PIFA with RT Duroid substrate is found to be better over all other substrates, which results lower SAR values to the human head in both GSM frequency bands. In addition, the substrate materials affect the SAR values much more at 900 MHz than that of at 1800 MHz. On the other hand, the antenna radiation efficiencies are not affected significantly, but they show small variation at lower and upper frequency bands due to different substrate materials.

Original languageEnglish
Pages (from-to)148-152
Number of pages5
JournalJournal of Optoelectronics and Advanced Materials
Volume18
Issue number1-2
Publication statusPublished - 1 Jan 2016

Fingerprint

antennas
Antennas
composite materials
Composite materials
Substrates
Frequency bands
radiation
Bakelite (trademark)
Antenna radiation
Radiation
Finite difference time domain method
Studios
finite difference time domain method
Microwaves
low frequencies
microwaves
Glass
glass
cells

Keywords

  • Antenna
  • Head model
  • PIFA
  • SAR
  • Substrate material

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

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title = "Analysis of the effects of antenna substrate composite materials on specific absorption rate",
abstract = "The effects of antenna dielectric substrate materials on the specific absorption rate (SAR) towards the human head are presented in this investigation. The variation of radiation efficiencies of antenna due to different substrate materials are also analyzed and discussed in the close vicinity of head model. An E-shaped planar inverted-F antenna (PIFA) is used as internal handset antenna in this analysis with five different dielectric substrate materials-Bakelite, FR4 glass epoxy, Rogers R04003, Taconic TLC and RT Duroid. Moreover, different thicknesses of each substrate are considered in the experimental setup. The studied cell phone is located beside a specific anthropomorphic (SAM) head phantom in a position of actual handset use. The finite-difference time-domain (FDTD) method with the lossy-Drude model is utilized in this study by using CST Microwave Studio. The SAR values and radiation efficiencies are calculated for two global system for mobile (GSM) frequency band at 900 MHz and 1800 MHz. The results show that the SAR values are affected due to the variation of substrate materials and its thickness. PIFA with RT Duroid substrate is found to be better over all other substrates, which results lower SAR values to the human head in both GSM frequency bands. In addition, the substrate materials affect the SAR values much more at 900 MHz than that of at 1800 MHz. On the other hand, the antenna radiation efficiencies are not affected significantly, but they show small variation at lower and upper frequency bands due to different substrate materials.",
keywords = "Antenna, Head model, PIFA, SAR, Substrate material",
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N2 - The effects of antenna dielectric substrate materials on the specific absorption rate (SAR) towards the human head are presented in this investigation. The variation of radiation efficiencies of antenna due to different substrate materials are also analyzed and discussed in the close vicinity of head model. An E-shaped planar inverted-F antenna (PIFA) is used as internal handset antenna in this analysis with five different dielectric substrate materials-Bakelite, FR4 glass epoxy, Rogers R04003, Taconic TLC and RT Duroid. Moreover, different thicknesses of each substrate are considered in the experimental setup. The studied cell phone is located beside a specific anthropomorphic (SAM) head phantom in a position of actual handset use. The finite-difference time-domain (FDTD) method with the lossy-Drude model is utilized in this study by using CST Microwave Studio. The SAR values and radiation efficiencies are calculated for two global system for mobile (GSM) frequency band at 900 MHz and 1800 MHz. The results show that the SAR values are affected due to the variation of substrate materials and its thickness. PIFA with RT Duroid substrate is found to be better over all other substrates, which results lower SAR values to the human head in both GSM frequency bands. In addition, the substrate materials affect the SAR values much more at 900 MHz than that of at 1800 MHz. On the other hand, the antenna radiation efficiencies are not affected significantly, but they show small variation at lower and upper frequency bands due to different substrate materials.

AB - The effects of antenna dielectric substrate materials on the specific absorption rate (SAR) towards the human head are presented in this investigation. The variation of radiation efficiencies of antenna due to different substrate materials are also analyzed and discussed in the close vicinity of head model. An E-shaped planar inverted-F antenna (PIFA) is used as internal handset antenna in this analysis with five different dielectric substrate materials-Bakelite, FR4 glass epoxy, Rogers R04003, Taconic TLC and RT Duroid. Moreover, different thicknesses of each substrate are considered in the experimental setup. The studied cell phone is located beside a specific anthropomorphic (SAM) head phantom in a position of actual handset use. The finite-difference time-domain (FDTD) method with the lossy-Drude model is utilized in this study by using CST Microwave Studio. The SAR values and radiation efficiencies are calculated for two global system for mobile (GSM) frequency band at 900 MHz and 1800 MHz. The results show that the SAR values are affected due to the variation of substrate materials and its thickness. PIFA with RT Duroid substrate is found to be better over all other substrates, which results lower SAR values to the human head in both GSM frequency bands. In addition, the substrate materials affect the SAR values much more at 900 MHz than that of at 1800 MHz. On the other hand, the antenna radiation efficiencies are not affected significantly, but they show small variation at lower and upper frequency bands due to different substrate materials.

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