Broadband Printed Monopole Antenna Research Articles

A novel compact and broadband printed monopole antenna for circular polarization

In this letter, a compact and broadband printed monopole antenna for circular polarization is proposed. In order to reduce the antenna size and achieve the circular polarization, the ground plane is combined by two elliptical shaped conductors with different size, and the antenna is designed asymmetrically to the microstrip line. The simulated and measured bandwidth of the 10dB-return loss with a 3dB-axial ratio is 57.9% (2.65GHz-4.81GHz) and 52.0% (2.45GHz-4.17GHz). The size of the antenna is 0.178 λc2 (λc is a wavelength in free space at the center frequency).

A Jug-Shaped CPW-Fed Ultra-Wideband Printed Monopole Antenna for Wireless Communications Networks

A type of telecommunication technology called an ultra-wideband (UWB) is used to provide a typical solution for short-range wireless communication due to large bandwidth and low power consumption in transmission and reception. Printed monopole antennas are considered as a preferred platform for implementing this technology because of its alluring characteristics such as light weight, low cost, ease of fabrication, integration capability with other systems, etc. Therefore, a compact-sized ultra-wideband (UWB) printed monopole antenna with improved gain and efficiency is presented in this article. Computer simulation technology microwave studio (CSTMWS) software is used to build and analyze the proposed antenna design technique. This broadband printed monopole antenna contains a jug-shaped radiator fed by a coplanar waveguide (CPW) technique. The designed UWB antenna is fabricated on a low-cost FR-4 substrate with relative permittivity of 4.3, loss tangent of 0.025, and a standard height of 1.6 mm, sized at 25 mm × 22 mm × 1.6 mm, suitable for wireless communication system. The designed UWB antenna works with maximum gain (peak gain of 4.1 dB) across the whole UWB spectrum of 3–11 GHz. The results are simulated, measured, and debated in detail. Different parametric studies based on numerical simulations are involved to arrive at the optimal design through monitoring the effects of adding cuts on the performance of the proposed antennas. Therefore, these parametric studies are optimized to achieve maximum antenna bandwidth with relatively best gain. The proposed patch antenna shape is like a jug with a handle that offers greater bandwidth, good gain, higher efficiency, and compact size.

A novel etched-substrate mechanism for characteristics improvement of X-band broadband printed monopole antenna

A unique tiny wideband antenna with improvements in fundamental features is offered. The antenna consists of a crown-shaped patch and an incomplete ground plane. The proposed patch shape is constructed by introducing multiple truncated circular-shaped arcs, which help to enhance the performance of the designed antenna. A unique strategy of etching the substrate structure, is integrated which aims to provide a useful solution for the excitation of the surface waves within the microstrip antenna. The essential attributes including impedance bandwidth and radiation efficiency of the recommended antenna are strengthened after the removal of these portions. The recommended antenna can be used for X-band applications with a compact size of 30 × 30 mm2. The usable impedance bandwidth (S11 ≤ 10 dB) covered by the proposed antenna is 6.2 GHz and ranges from 5.8 to 12 GHz. The antenna is experimentally tested to confirm the outcomes of the simulation thus, a satisfactory agreement is reached between simulated and measured results that prove the antenna’s validity for wideband operations.

Broadband µ-negative antenna using ELC unit cell

A broadband printed monopole antenna is designed by using ELC (Electric Inductive–Capacitive) based metamaterial element for WLAN applications. The proposed antenna comprises single ring hexagon loaded with ELC metamaterial for broadband radiation. ELC is designed with a square loop nested inside the ring hexagon structure which is coupled by the small metal stub. By introducing ELC, it significantly improves the impedance bandwidth of the antenna due to unique EM wave property. The band characteristics of the ELC and its metamaterial property (negative permeability) are explained through waveguide setup method. The designed antenna involves with dimensions 30 × 30 × 0.8 mm3 and fabricated on a low-cost Flame Retardant-4 substrate having εr = 4.4 and tanδ = 0.02. It yields an impedance bandwidth of 2600 MHz (2.61–5.21 GHz) with a dual resonance of 3.21 GHz and 4.89 GHz, which is usable for WiMAX, C-band and WLAN applications. The measured far-filed pattern exhibits a stable pattern. The proposed antenna has many benefits, such as comprising compact size, simple structure, lower S11 (dB) and capable of broadband characteristics.

A compact and broadband printed monopole antenna for circular polarization

A compact and broadband printed monopole antenna for circular polarization

Very small planar broadband monopole antenna with hybrid trapezoidal–elliptical radiator

A compact and broadband printed monopole antenna (PMA) with a hybrid trapezoidal–elliptical radiator is proposed. An overlap region between the trapezoidal and elliptical patches is introduced to enhance the impedance bandwidth. Meanwhile, by etching two symmetrical quarter-elliptical slots on the ground plane and optimising the ellipticity ratio, further improvement in the impedance bandwidth is achieved. Measured results show that the antenna can cover the frequency range of 2.4–18.6 GHz (|S 11| < −10 dB) while its total size is only 25 × 25 × 1.2 mm3. In addition, omnidirectional radiation patterns, desirable gain, high radiation efficiency and nearly constant group delay are obtained. Compared with recent PMAs, the proposed antenna has a smaller size and wider bandwidth, simultaneously.

A decagon shaped universal compact broadband printed monopole antenna

ABSTRACTIn this article, a decagon shaped universal compact broadband printed monopole antenna has been described which consists of a decagon shaped patch and a valley shaped notch in the partial ground plane for multiple applications, operating at frequency ranges from 3.5 GHz to greater than 100 GHz. The overall dimension of the proposed antenna is 15*20*1.5 cubic millimeter and is fabricated on commercially available low cost FR4 substrate having electrical permittivity (εr) of 4.3 and loss tangent of 0.025. The proposed antenna has some of the range for ultra‐wide band applications, Wi‐Fi, 3.5/5.5GHz WiMAX band, 5.2/5.8GHz WLAN band, 60/90 GHz E‐band military applications, 8/12 GHz X‐band, 12/18 GHz Ku ‐band, 26.5/40 GHz Ka‐band, 40/60 GHz U‐band, 50/75 GHz V‐band, 75/110 GHz W‐band,space and satellite communications etc. The impedance bandwidth (S‐parameter &lt; 10 dB) is more than 188%, radiation efficiency is 78% and the peak gain is 7.6 dB. The simulated return losses, impedance curves, radiation efficiency, gain, surface current and radiation patterns of the proposed antenna are elaborated in this paper.© 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2760–2764, 2016

A compact broadband printed monopole antenna with U-shaped slit and rectangular parasitic patches for multiple applications

This paper presents a compact broadband printed monopole antenna with U-shaped slit in the partial ground plane and rectangular parasitic patches adjacent to the microstrip line for multiple applications. The optimal dimensions of the proposed antenna are 35 × 25 × 1.5 mm3 and is fabricated on commercially available low-cost FR4 substrate with εr = 4.3 and 0.025 loss tangent. Due to introduction of rectangular parasitic patches and U-shaped slit large bandwidth has been achieved. The impedance bandwidth (return loss, magnitude of S11 &lt; 10 dB) of the proposed antenna is 139% (2.9–16.3 GHz). The proposed antenna covers ultra wide band applications, 5.2/5.8 GHz WLAN bands, 3.5/5.5 GHz WiMAX bands, X band (8–12 GHz), satellite communication, and other wireless communication services. The study shows that there is good agreement in simulated and measured results. Nearly stable radiation patterns have been obtained throughout the operating band. Antenna results and details are discussed and elaborated.

Design and implementation of a novel dual band notched antenna for UWB applications

ABSTRACTA novel dual band‐notched antenna with simple structure for ultrawideband (UWB) applications is presented in this letter. The proposed antenna is a broadband printed monopole antenna, consisting of a hexagonal radiation patch and a rectangular ground plane with an etched circular area below the patch. By inserting two pairs of symmetric L‐shaped parasitic branches into the etched circular area, dual notch bands are achieved, respectively, at the WiMAX and WLAN band. The proposed antenna is small in size (30 × 40 mm2) and operates at the band from 2.2 to 12 GHz for VSWR &lt; 2, except for 2.7–3.7 and 4.9–6.0 GHz. A prototype of the antenna is fabricated and measured. The simulated and measured results indicate the antenna has a good prospect for UWB applications. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2922–2925, 2014

Evolution Process of a Broadband Coplanar- Waveguide-fed Monopole Antenna for Wireless Customer Premises Equipment

In this paper a design process of a broadband printed monopole antenna using stepped cut at four corners (CSFC) technique is proposed. The CSFC is a technique that four corners a patch (rectangular/square) of planar monopole antennas are cut in order to enhance the impedance bandwidth. The technique can be used to design any different types of planar monopole antenna in specific frequency ranges. Therefore, to become more acquaintance with the CSFC technique an evolution process of single band to broadband antenna is represented. However, the proposed antenna is designed for wireless indoor customer premises equipment (CPE) using the coplanar waveguide (CPW) feeding technique. Moreover, the antenna is simulated using CST software and also fabricated and tested so as to validate the results. The simulated and measured -10 dB reflection bandwidth is 104% (850MHz to 2.7 GHz) to cover GSM (900 and 1800 MHz), WiFi (2.4 GHz) and LTE (2.6 GHz) applications. High efficiency and gain as well as omnidirectional and quasi-omnidirectional of radiation pattern at lower and upper frequencies have been achieved.

Impedance Mathing Improvement of Half-Cut Broadband Printed Monopole Antenna with Microstrip Feeding

The requirement of wireless access networks and user equipments to support coexistence of many communication standards and frequency bands poses challenge on antenna to be broadband and small. The application of half-cut technique to broadband printed monopole with microstrip feeding worsens the resulted antenna’s impedance. To improve the half-cut antenna impedance mathing, two methods were investigated in this paper: (1) monopole and ground extension, (2) the application of microstrip line transformer and ground extension. The first approach only produces limited improvement, whereas method #2 can enhance the return loss significantly. The application of the second approach potentially produces antenna pair that has low mutual coupling, good return loss, and small size. Considering its radiation pattern, the antenna is suitable for diversity and MIMO. Its application in broadband microwave-photonic access point need special arrangement due to radiation null at 5 GHz band at right side. DOI: http://dx.doi.org/10.11591/ijece.v3i5.3376

A novel compact broadband printed monopole antenna for mobile handsets

AbstractA novel compact broadband printed antenna for mobile handsets is proposed and studied.The proposed antenna occupies an area of 20 × 16 mm2, consisting of an inverted‐S monopole for 2‐GHz band and an inverted‐L branch for 3‐GHz band. It achieves a bandwidth of 560 MHz at the 2‐GHz band (1.66–2.22 GHz) and 500 MHz at the 3‐GHz band (3.24–3.74 GHz) for −10 dB return loss, covering GSM (1710–2170 MHz), DCS (1710–1880 MHz), PCS (1850–1990 MHz), PHS (1880–1930 MHz), UMTS (1920–2170 MHz), and WiMAX (3400–3600 MHz) bands. Numerical simulation and verifying experimental results are presented and discussed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:118–121, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25680

다중 전류 분포 광대역 평면형 모노폴 안테나 해석

In this paper we proposed a novel broadband printed monopole antenna for PCS/IMT-2000/WLAN terminals by widening current flow To compensate narrow bandwidth characteristics which is one of disadvantages of general printed monopole antenna, we add the patch of diamond shape and induce the current in various directions for acquiring broadband characteristics. And frequency characteristics is optimized with Various design parameters. The bandwidth of the realized antenna is (58.72 %) below the return loss of -10 dB which contain the required band-width of PCS/IMT-2000/WLAN band.

Z자형 패치를 갖는 광대역 평판형 모노폴 안테나 설계 및 SAR 해석

This paper proposed a novel broadband printed monopole antenna for PCS/IMT-2000/WLAN terminals. Frequency characteristics are optimized with various design parameters. Two Z-shaped patchs were utilized in order to improve the characteristics of a printed monopole antenna which usually has a narrow bandwidth. The bandwidth of the realized antenna is GHz(48.43 %) below the return loss of -10 dB which contain the required bandwidth of PCS/IMT-2000/WLAN band. The simulated and measured values of 1 g and 10 g averaged peak SAR on human head caused by the proposed antenna on folder-type phone were analyzed and discussed. As a result, the measured 1 g peak SAR value is 0.794 W/kg and 10 g peak SAR value is 0.368 W/kg at 1.8 GHz. The results are smaller than the reference SAR limit values that are respectively 1.6 W/kg and 2 W/kg on 1 g and 10 g averaged SAR values.

New broadband dual‐printed inverted L‐shaped monopole antenna for tri‐band wireless applications

AbstractA broadband printed monopole antenna is proposed for digital communication systems (DCS‐1800), personal communication services (PCS1900), and international mobile telecommunication (IMT‐2000) tri‐band mobile devices. The proposed antenna is composed of two inverted L‐shaped monopoles, and they are back‐to‐back shorted by the center strip of a coplanar waveguide feed. To improve bandwidth and impedance matching, a small gap is introduced in one of the L‐shaped monopoles. As a result, the dual‐monopoles with almost the same size can resonate at two different frequencies with the improved bandwidth and impedance matching. Once two frequencies are close to each other by adjusting the position of the gap, a broadband operation can be achieved to cover DCS, PCS, and IMT tri‐bands. To demonstrate the proposed design, simulated and measured results are presented and discussed. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 278–280, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22107

Low‐profile broadband printed VHF monopole antenna for vehicular applications

AbstractA novel low‐profile broadband printed monopole antenna suitable for VHF operations on vehicles is presented. The proposed monopole antenna is printed on a flexible printed circuit board and then folded onto a cylindrical foam base. A constructed prototype suitable for operation in the 200‐MHz band is demonstrated. The prototype has a low profile of about 11 cm only (about 7% of the wavelength at 200 MHz) and shows a wide bandwidth (2.5:1 VSWR) of larger than 20%. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 349–350, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20301