Optimization of Planar Monopole Wideband Antenna for Wireless Communication System

PLOS ONE, Dec 2019

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 arc-shaped 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 (8-12GHz), and Ku band (12-18GHz).

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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). - 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)


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Mohammed Nazmus Shakib, Mahmoud Moghavvemi, Wan Nor Liza Mahadi. Optimization of Planar Monopole Wideband Antenna for Wireless Communication System, PLOS ONE, 2016, Volume 11, Issue 12, DOI: 10.1371/journal.pone.0168013