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A Low-profile planar monopole internal antenna for GSM/DCS/PCS/IMT/UMTS/WLAN/ISM/LTE operation in the Mobile phones

Published online by Cambridge University Press:  07 August 2018

Lakbir Belrhiti ,
Fatima Riouch ,
Abdelwahed Tribak ,
Jaouad Terhzaz  and
Angel Mediavilla Sanchez
Lakbir Belrhiti*
Affiliation:
STRS Laboratory, National Institute of Posts and Telecommunications-INPT, Rabat, Morocco
Fatima Riouch
Affiliation:
STRS Laboratory, National Institute of Posts and Telecommunications-INPT, Rabat, Morocco
Abdelwahed Tribak
Affiliation:
STRS Laboratory, National Institute of Posts and Telecommunications-INPT, Rabat, Morocco
Jaouad Terhzaz
Affiliation:
Centre régional des métiers de l’éducation et de la formation (CRMEF), Casablanca, Morocco
Angel Mediavilla Sanchez
Affiliation:
DICOM, University of Cantabria, Santander, Spain
*
Author for correspondence: L. Belrhiti, belrhiti@inpt.ac.ma
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Abstract

In this paper, a novel low-profile planar monopole internal antenna for GSM/DCS/PCS/ IMT/UMTS/WLAN/ISM/LTE operation in the mobile phones is designed and developed. The proposed antenna is composed of multi-branches, F-shaped slots in the system ground plane and tapered feeding line which can improve the impedance matching at the feeding point. The antenna occupying a small area of 18.5 × 46 mm2 is placed on the top no-ground portion of the system circuit board, which makes it suitable for practical mobile applications. A prototype of the proposed antenna is fabricated and tested. In addition, the planar monopole antenna can provide two wide lower and upper bands to respectively cover the frequency range of 848–1152 MHz, and 1736–3000 MHz, for the GSM850/GSM900/DCS1800/PCS1900/IMT2000/UMTS2100/WLAN2400/ISM2450/LTE2300/LTE2500 operation in the mobile phone. Good radiation patterns and antenna peak gain for frequencies over the operating bands have been observed. The antenna is simulated and designed by using Ansoft HFSS and CST Microwave Studio. Details of the antenna design, results on the reflection coefficient, radiation characteristics, directivity, antenna gain, realized gain, and efficiency of the antenna are given and discussed. Finally, the specific absorption rate (SAR) of the proposed antenna placed at the bottom of the mobile phone is also investigated. The obtained SAR values meet the limit of 1.6 W/kg for the 1 g head tissue and 2.0 W/kg for the 10 g head tissue.

Keywords

F-shaped slotsGSM/DCS/PCS/IMT/UMTS/WLAN/ISM/LTEmobile phonesmulti-branchesplanar monopole antennaspecific absorption rate
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 1 , February 2019 , pp. 53 - 66
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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