Dual band microstrip antenna for 4G-LTE handheld devices

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Dual band microstrip antenna for 4G-LTE handheld devices. In this paper, a dual-band antenna that works at 1780 MHz and 2610 MHz has been proposed for 4G-LTE handheld devices. The antenna has been designed on FR4 substrate with sizes of 20 mm × 50 mm × 1.2 mm to fit the mobile casing. The simulation and measurement results of both return loss and radiation patterns have also been presented. Very good agreement between simulated ans measured data has been obtained.
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VNU Journal of Science: Comp. Science & Com. Eng. Vol. 31, No. 1 (2015) 55–59
Dual-band Microstrip Antenna for 4G-LTE Handheld Devices
Nguyen Minh Tran, Truong Vu Bang Giang
VNU University of Engineering and Technology, Hanoi, Vietnam
Abstract
The evolution of wireless technology has grown dramatically. In recent years, the fourth generation, 4G-LTE, has
been implemented. The 4G expansion firstly demands to construct infrastructures and devices of 4G systems, in
which the antenna is an essential part of 4G devices, especially mobile phones. The antenna has to be designed to
meet both frequency bands for this new technology and limited size to fit the required housing. All over the world,
there are di erent frequency bands allocated for 4G. Therefore, the multi-band antennas would be very useful.
In this paper, a dual-band antenna that works at 1780 MHz and 2610 MHz has been proposed for 4G-LTE
handheld devices. The antenna has been designed on FR4 substrate with sizes of 20 mm  50 mm  1.2 mm to
fit the mobile casing. The simulation and measurement results of both return loss and radiation patterns have also
been presented. Very good agreement between simulated ans measured data has been obtained.
2015 Published by VNU Journal of Science.
Manuscript communication: received 14 January 2015, revised 09 March 2015, accepted 21 March 2015
Corresponding author: Truong Vu Bang Giang, giangtvb@vnu.edu.vn
Keywords:
dual- band antenna, 4G-LTE, microstrip antenna.
1. Introduction
Table 1: Allocated bands for 4G-LTE standard in Vietnam
4G-LTE,
developed
by
the
3rd
Generation
4G-LTE bands
PartnershipProject,isastandardforwirelessdata
communications technology and an evolution
of the previous standards. The goal of 4G
technology is to increase the capacity and
Low frequency band
High frequency band
1785-1805 MHz
1880-1990 MHz
2570-2575 MHz
2615-2620 MHz
or
or
speed
of
wireless
data
networks
using
new
DSP (digital signal processing) techniques and
modulations.
Currently,
Vietnamese Network
4G/LTE handsets (700 MHz/2.5-2.7 GHz) with
Service
Providers
have
already
accomplished
total size of 38 mm  50 mm (for antenna) and
the 3G coverage and provision for users,
and
82 mm  50 mm (for the ground plane) has been
preparing to implement 4G technology.
The
presented in [1]. This antenna has been designed
Authority of Radio Frequency Management also
using FR4-epoxy substrate (the permittivity r
planned
to
provide
frequency
bands
for
this
=4.4) with size 120 mm  50 mm, thickness h
standard to be used by mobile service providers
= 0.762.
An antenna in [2] was designed for
in Vietnam as shown in Table 1.
LTE
700
MHz
applications
using
FR4-epoxy
Due to the allocated frequencies, the antenna
and thickness of h = 1.6 mm.
In [3], a plannar
must be redesigned to meet these requirements.
antenna for WWAN/LTE on FR4 with size 75
In the literature,
antennas for 4G/LTE mobile
mm  10 mm, thickness h=0.8 mm, and 200
phones have been designed with various shapes,
mm  260 mm copper plate for system ground
sizes and purposes.
A dual-band antenna for
plane has been proposed. In [4], an antenna was