Optimization of Planar Monopole Wideband Antenna for Wireless Communication System
December
Optimization of Planar Monopole Wideband Antenna for Wireless Communication System
Mohammed Nazmus Shakib 0 1
Mahmoud Moghavvemi 0 1
Wan Nor Liza Mahadi 1
0 Centre of Research in Applied Electronics, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia, 2 Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia, 3 University of Science and Culture , Tehran , Iran
1 Editor: Houbing Song, West Virginia University , UNITED STATES
In this paper, a new compact wideband monopole antenna is presented for wireless communication applications. This antenna comprises of a new radiating patch, a new arcshaped strip, microstrip feed line, and a notched ground plane. The proposed radiating patch is combined with a rectangular and semi-circular patch and is integrated with a partial ground plane to provide a wide impedance bandwidth. The new arc-shaped strip between the radiating patch and microstrip feed line creates an extra surface on the patch, which helps further widen the bandwidth. Inserting one step notch on the ground plane further enhances the bandwidth. The antenna has a compact size of 16×20×1.6mm3. The measured result indicated that the antenna achieves a 127% bandwidth at VSWR 2, ranging from 4.9GHz to 22.1GHz. Stable radiation patterns with acceptable gain are achieved. Also, a measured bandwidth of 107.7% at VSWR 1.5 (5.1-17GHz) is obtained, which is suitable for UWB outdoor propagation. This antenna is compatible with a good number of wireless standards, including UWB band, Wimax 5.4 GHz band, MVDDS (12.2±12.7GHz), and close range radar and satellite communication in the X-band (812GHz), and Ku band (12-18GHz).
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OPEN ACCESS
Data Availability Statement: All relevant data are
within the paper and its Supporting Information
files.
Funding: This work was supported by the Ministry
of Higher Education of Malaysia, project no
FRGS/2/2014/TK03/UM/01/1 (FP003-2014B) and
the Bright Spark Grant (No: BSP/APP/1133/2012),
PPP Grant (No: PG131-2013A) of the University of
Malaya. The funders had no role in study design,
data collection and analysis, decision to publish, or
preparation of the manuscript.
The recent and anticipated growth of wireless systems has fueled research efforts towards
increasing the capacity of wireless systems and its network topology. This increased capacity
is the result of both subscriber growth and anticipated data services, which needs
significantly higher data rates than voice systems [1±6]. These systems need to be compact and
integrated with high performing devices to reduce cost and enhance performance. Thus, it
requires wideband antennas for high-speed transmission and simple hardware configuration
relative to conventional wireless communication systems [7±10]. UWB (ultrawideband)
system is regarded as a promising technology due to its allocation of the 3.1±10.6 GHz
bandwidth by the Federal Communications Commission (FCC) [
7
]. The UWB antenna possesses
attractive features, such as low profile, compactness, low-cost, reliability, low-power pulses,
and high data transmission. It is also compatible and easily integrated with electronic
devices. The current challenge facing engineers is to miniaturize antennas whilst
maintaining wideband characteristics. For that purpose, many antenna topologies and configurations
for wideband operations have been studied and reported in literature. Different antennas,
such as spiral antenna [
11
] and loop antenna [
12
] were designed for wideband applications.
Several other techniques were introduced, such as Y-V slotted patch [
13
], and angular folded
patch [
14
]. The designs in [11±14] is capable of achieving wide impedance bandwidth.
However, these antennas are relatively larger, which makes it difficult for them to be fitted into
small devices.
Planar antennas have received much attention due to its attractive features, such as its
compact size, low-profile, light weight, and easy fabrication. Several compact monopole planar
antennas with different sizes and shapes are reported in literature. In [
15
], a linearly tapered
slot antenna was compacted by etching one side of the tapered shaped patch and introducing
a corrugated pattern of cuts on the right side. This antenna requires an overall size of
36×35×0.8mm3. Recently, a monopole antenna is developed using a wrench-shaped feed
structure, where the antenna entails a dimension of 20×30×1.6mm3 [
16
]. A printed G-shaped
monopole antenna has been proposed for UWB application in [
17
], where the antenna
dimension is 28×35×1.6mm3. In [
18
], a printed antenna with a two-step rectangular radiating patch
and a slot inside the patch is introduced with a partial ground plane for the purpose of
reducing the ground plane effect and realizing a compactness of 25×26×1.6mm3. In [
19
], a printed
monopole antenna with four slots at different corners of a modified radiating patch is
developed for UWB applica (...truncated)