Bandwidth enhancement of capacitive fed monopole antenna using parasitic patches

2015 ◽  
Vol 8 (2) ◽  
pp. 301-307 ◽  
Author(s):  
Kamalaveni Ayyadurai ◽  
Ganesh Madhan Muthu
Keyword(s):  
Near Field ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Bandwidth Enhancement ◽  
System A ◽  
Radiating Element ◽  
The One ◽  
Radio Band ◽  
5 Ghz

This paper proposed a compact planar monopole antenna operating at 5 GHz (5.180–5.825 GHz) industrial, scientific and medical (ISM) radio band. The antenna constructed with 20 mm × 12 mm radiating element and 25 mm square of the ground plane in FR4 substrate provided −10 dB bandwidth of 1 GHz (5.4–6.4 GHz). To improve the bandwidth, parasitic elements are added with the monopole antenna. A capacitive feed is also incorporated in the design. It observed that the proposed antenna with parasitic elements provides a larger impedance bandwidth of about 3 GHz (5.1–8.1 GHz), which is three-fold improvements over the one without parasitic patches. The prototype of the antenna that operates at 5.8 GHz frequency range is fabricated and characterized using a near-field measurement system. A good agreement is found between the simulation and measured results.

scholarly journals Compact Planar Super-Wideband Monopole Antenna with Four Notched Bands

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1204 ◽  
Author(s):  
Sachin Kumar ◽  
Gwan Hui Lee ◽  
Dong Hwi Kim ◽  
Nashuha Syifa Haunan ◽  
Hyun Chul Choi ◽  
...  
Keyword(s):  
Satellite Communication ◽  
Ground Plane ◽  
High Gain ◽  
Split Ring Resonator ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Directional Radiation ◽  
X Band ◽  
Radio Band ◽  
Good Agreement

A compact-sized planar super-wideband (SWB) monopole antenna with four notched bands is presented in this paper. The antenna consists of a rectangular ground plane and a circular radiator that is fed by a tapered microstrip feed line. The overall size of the antenna is 18 mm × 12 mm × 0.5 mm, and its impedance bandwidth (S11 ≤ −10 dB) ranges from 2.5 GHz to 40 GHz (bandwidth ratio of 16:1). Four notched bands are obtained using two inverted U-shaped slots, a split-ring resonator (SRR), and a meandered slot. The notched frequency bands can be adjustable by changing the parameters of parasitic slot elements, and the realized notched bands in this paper are Wi-MAX band (3.5 GHz), WLAN band (5.5 GHz), satellite communication X-band (7.5 GHz), and amateur radio band (10.5 GHz). The simulated and experimental results show good agreement with each other. The antenna possesses a high gain, super-wide impedance bandwidth, and omni-directional radiation patterns.

scholarly journals Bandwidth Enhancement of a Dual Band Planar Monopole Antenna Using Meandered Microstrip Feeding

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
M. R. Ahsan ◽  
M. T. Islam ◽  
M. Habib Ullah ◽  
N. Misran
Keyword(s):  
Dielectric Material ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Performance Criteria ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Uhf Rfid ◽  
Bandwidth Enhancement ◽  
Lower Band ◽  
High Dielectric

A meandered-microstrip fed circular shaped monopole antenna loaded with vertical slots on a high dielectric material substrate(εr=15)is proposed in this paper. The performance criteria of the proposed antenna have been experimentally verified by fabricating a printed prototype. The experimental results show that the proposed antenna has achieved wider bandwidth with satisfactory gain by introducing meandered-microstrip feeding in assistant of partial ground plane. It is observed that, the −10 dB impedance bandwidth of the proposed antenna at lower band is 44.4% (600 MHz–1 GHz) and at upper band is 28% (2.25 GHz–2.95 GHz). The measured maximum gains of −1.18 dBi and 4.87 dBi with maximum radiation efficiencies have been observed at lower band and upper band, respectively. The antenna configuration and parametric study have been carried out with the help of commercially available computer-aided EM simulator, and a good accordance is perceived in between the simulated and measured results. The analysis of performance criteria and almost consistent radiation pattern make the proposed antenna a suitable candidate for UHF RFID, WiMAX, and WLAN applications.

A bandwidth enhancement and size reduction of monopole microstrip antenna for ultra wideband application

2018 ◽  
Vol 15 (3) ◽  
pp. 330-335
Author(s):  
Saadi Djidel ◽  
Mohamed Bouamar ◽  
Djamel Khedrouche
Keyword(s):  
Ground Plane ◽  
Antenna System ◽  
Monopole Antenna ◽  
Size Reduction ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Content Type ◽  
Bandwidth Enhancement ◽  
Compact Size ◽  
Microstrip Monopole Antenna

PurposeModern wireless communication application requires an antenna system to meet the requirements of miniaturization and wideband characteristic. In recent years, several antenna designs, that meet these requirements, have been proposed in the literature. In this context, the purpose of this paper is to design a new microstrip monopole antenna with a bandwidth enhancement and size reduction for ultra wideband application.Design/methodology/approachThe patch, of leaf of a plant shape, the feed line and the ground plane are printed on the inexpensive FR4 substrate material with permittivity 4.4 and loss tangent 0.02. To obtain optimal dimensions, a parametric study is conducted through numerical computations by using electromagnetic simulators HFSS and CST. A prototype of the optimized antenna is fabricated and subjected to a series of simulations and measurements.FindingsThe measurement results show a −10 dB impedance bandwidth of 6.7 GHz (3.5 GHz-10.2 GHz) which can cover the whole bandwidth requirements of an ultra wideband application. The designed antenna exhibits nearly symmetric and omnidirectional radiations patterns over the operating band, which is a sought-after behavior in microstrip patch antennas and has overall size of 35 × 31 mm2.Originality/valueThe proposed microstrip monopole antenna is very useful for modern wireless communications systems because of its compact size, its capability of covering the whole ultra wideband frequency band and its good radiation characteristics.

A compact dual port UWB-MIMO/diversity antenna for indoor application

2017 ◽  
Vol 10 (3) ◽  
pp. 360-367 ◽  
Author(s):  
Sonika Priyadarsini Biswal ◽  
Sushrut Das
Keyword(s):  
Mimo System ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Open Circuit ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Good Prospect ◽  
Mimo Antenna ◽  
Radiating Element ◽  
Input Multiple Output

A compact printed quadrant shaped monopole antenna is introduced in this paper as a good prospect for ultra wideband- multiple-input multiple-output (UWB-MIMO) system. The proposed MIMO antenna comprises two perpendicularly oriented monopoles to employ polarization diversity. An open circuit folded stub is extended from the ground plane of each radiating element to enhance the impedance bandwidth satisfying the UWB criteria. Two ‘L’ shaped slots are further etched on the radiator to provide good isolation performance between two radiators. The desirable radiator performances and diversity performances are ensured by simulation and/or measurement of the reflection coefficient, radiation pattern, realized peak gain, envelope correlation coefficient (ECC), diversity gain, mean effective gain (MEG) ratio and channel capacity loss (CCL). Results indicate that the proposed antenna exhibits 2.9–11 GHz 10 dB return loss bandwidth, mutual coupling <−20 dB, ECC < 0.003, MEG ratio ≈ 1, and CCL < 0.038 Bpsec/Hz, making it a good candidate for UWB and MIMO diversity application.

scholarly journals A Novel High Gain Monopole Antenna Array for 60 GHz Millimeter-Wave Communications

2020 ◽  
Vol 10 (13) ◽  
pp. 4546
Author(s):  
Tarek S. Mneesy ◽  
Radwa K. Hamad ◽  
Amira I. Zaki ◽  
Wael A. E. Ali
Keyword(s):  
Antenna Array ◽  
Communication Systems ◽  
Ground Plane ◽  
High Gain ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Single Element ◽  
60 Ghz ◽  
Defected Ground Structure ◽  
Element Array

This paper presented the design and implementation of a 60 GHz single element monopole antenna as well as a two-element array made of two 60 GHz monopole antennas. The proposed antenna array was used for 5G applications with radiation characteristics that conformed to the requirements of wireless communication systems. The proposed single element was designed and optimized to work at 60 GHz with a bandwidth of 6.6 GHz (57.2–63.8 GHz) and a maximum gain of 11.6 dB. The design was optimized by double T-shaped structures that were added in the rectangular slots, as well as two external stubs in order to achieve a highly directed radiation pattern. Moreover, ring and circular slots were made in the partial ground plane at an optimized distance as a defected ground structure (DGS) to improve the impedance bandwidth in the desired band. The two-element array was fed by a feed network, thus improving both the impedance bandwidth and gain. The single element and array were fabricated, and the measured and simulated results mimicked each other in both return loss and antenna gain.

scholarly journals Bandwidth Enhancement Technique of the Meandered Monopole Antenna

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Chien-Jen Wang ◽  
Dai-Heng Hsieh
Keyword(s):  
Communication Systems ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Matching Condition ◽  
Resonant Mode ◽  
Monopole Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Feeding Structure

A small dual-band monopole antenna with coplanar waveguide (CPW) feeding structure is presented in this paper. The antenna is composed of a meandered monopole, an extended conductor tail, and an asymmetrical ground plane. Tuning geometrical structure of the ground plane excites an additional resonant frequency band and thus enhances the impedance bandwidth of the meandered monopole antenna. Unlike the conventional monopole antenna, the new resonant mode is excited by a slot trace of the CPW transmission line. The radiation performance of the slot mode is as similar as that of the monopole. The parametrical effect of the size of the one-side ground plane on impedance matching condition has been derived by the simulation. The measured impedance bandwidths, which are defined by the reflection coefficient of −6 dB, are 186 MHz (863–1049 MHz, 19.4%) at the lower resonant band and 1320 MHz (1490–2810 MHz, 61.3%) at the upper band. From the results of the reflection coefficients of the proposed monopole antenna, the operated bandwidths of the commercial wireless communication systems, such as GSM 900, DCS, IMT-2000, UMTS, WLAN, LTE 2300, and LTE 2500, are covered for uses.

scholarly journals Electromagnetic Bandgap Structured CPW Fed Circular Monopole Antenna with Bandwidth Enhancement for Wideband Applications

2019 ◽  
Vol 8 (10) ◽  
pp. 879-882
Keyword(s):  
Satellite Communication ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Dual Band ◽  
Complete Analysis ◽  
Electromagnetic Bandgap ◽  
Bandwidth Enhancement ◽  
Proposed Model ◽  
Current Design ◽  
Band Gap Structure

A circular monopole antenna with coplanar wave guide feeding is constructed with the combination of Electromagnetic Band Gap structure for the improvement of bandwidth. A plus shaped defected ground is etched on the ground plane to obtain the EBG characteristics in the proposed antenna model. A complete analysis with respect to reflection coefficient, VSWR, impedance, radiation pattern, current distribution, gain and efficiency are presented in this work. The proposed model occupying the dimension of 50X50X1.6 mm on FR4 substrate with dielectric constant of 4.3. Antenna operating in the dual band of 1.5-3.6 GHz (GPS, LTE, Bluetooth and Wi-Fi applications) and 4.8-15 GHz (WLAN, X-Band and Satellite communication applications) with bandwidth of 2.1 and 10.2 GHz respectively. A peak realized gain of 4.8 dB and peak efficiency more than 80% are the key features of the current design.

scholarly journals Bandwidth Enhancement of a Bell-shaped UWB Antenna for Indoor Localization Systems

2021 ◽  
Vol 11 (1) ◽  
pp. 6691-6695
Author(s):  
M. S. Karoui ◽  
N. Ghariani ◽  
M. Lahiani ◽  
H. Ghariani
Keyword(s):  
Indoor Localization ◽  
Low Cost ◽  
Ground Plane ◽  
Wide Band ◽  
Impedance Bandwidth ◽  
Uwb Antenna ◽  
Simple Method ◽  
Bandwidth Enhancement ◽  
Measured Impedance ◽  
Localization Systems

In this paper, a simple method of enhancing the bandwidth of the Bell-shaped UWB Antenna for indoor localization systems is proposed. Therefore, a modified version of the bell-shaped Ultra-Wide Band (UWB) antenna for indoor localization systems is presented. The proposed antenna is printed on a low-cost FR-4 substrate of 21×27×1.6mm3 size. It is composed of a bell-shaped radiating patch and a multi-slotted ground plane. The measured results show that the proposed antenna has an impedance bandwidth of about 11.2GHz ranging from 3.16GHz to 14.36GHz at S11<−10dB. Compared to the original version, an enhancement of about 5.56GHz in the measured impedance bandwidth was observed.

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