Antenna For Wireless Applications Research Articles

Design and development of Modified Hybrid Fractal Antennas for wireless applications

Design and development of Modified Hybrid Fractal Antennas for wireless applications

Design an ACS-Fed Multi Band Antenna for Wireless Applications Using Defected Ground Structure

Design an ACS-Fed Multi Band Antenna for Wireless Applications Using Defected Ground Structure

Simplified Micro-Strip Wearable Antenna for Wireless Application

Simplified Micro-Strip Wearable Antenna for Wireless Application

Circularly Polarized Slot Antenna for wireless Applications

Circularly Polarized Slot Antenna for wireless Applications

Single-Feed Superstrate Loaded Circularly Polarized Microstrip Antenna for Wireless Applications

The paper presents three single fed circularly polarized square patch antenna structures for wireless communication applications. The antennas resonate from 1.5 to 1.8 GHz and can cover L-band GPS and GSM 1800 band. The antenna-1 consisting of four slits introduced at the boundary of radiating square patch with a cross slot in the centre. The antenna-2 exhibits four slits, a cross slot in the centre with radiating square patch protected using dielectric superstrate. A wider impedance bandwidth of 100 MHz is achieved with superstrate loading. Also, the antenna gain is improved up to a maximum level of 7 dB within the band of operation. Further, stacking of antenna-1 is done using conventional square patch as the parasitic element. The dual-band resonating antenna-3 is achieved with circular polarization in both of the frequency bands. The 3-dB axial ratio bandwidth is 1.1 % for the upper band and 1.3 % for the lower band. Proposed structures are fabricated on the FR-4 epoxy substrate and fed using SMA connector. The measured results are in good agreement with the simulated results.

Compact CPW-fed tri-band antenna with a defected ground structure for GSM, WLAN and WiMAX applications

In this paper we propose and investigate a unique compact FR4 based CPW-fed tri-band antenna for wireless applications. The antenna comprises frequency shifting strips and a defected ground structure (formed by combining of metallic strips and cutting of an L-shaped slot from the ground). The proposed antenna provides three different impedance bandwidths of 0.57, 0.98 and 1.59 GHz which are sufficient to cover the frequency band of GSM 1800/1900, WLAN 5.5/5.8 GHz and WiMAX applications. The developed antenna has a size of 17-20 mm and operates over frequency ranges 1.50–2.08, 5.25–6.23 and 9.10–10.69 GHz centered at 1.702, 5.802 and 10.102 GHz, respectively. The antenna was designed and simulated using Ansoft HFSS software. The antenna’s characteristics such as reflection coefficient, radiation pattern, impedance bandwidth and VSWR are presented.

Dielectric loaded quasi-lumped element resonator antenna circuit model for U-NII/ISM band wireless applications

In this paper, an analytical procedure for characterizing the dielectric loaded quasi-lumped element resonator (QLER) antenna for wireless applications is presented. The procedure is to examine the equivalent circuit model for the dielectric loaded QLER antenna and its feed structure, based on transmission line theory and equivalent lumped-element circuits. The corresponding lumped-circuit parameters of the equivalent circuit are extracted using analytical formulae taken from the literature and validated by comparison with numerical simulations such as a full-wave finite-element computer code and with experiments. The devised equivalent circuit explains its behavior as either a wide bandwidth or dual-band antenna, depending on the spacing between the dielectric resonator (DR) and the coaxial feed probe location.

Simplified Micro-Strip Wearable Antenna for Wireless Application

In this paper basic micro-strip patch antenna used for applications mainly in wireless domain is presented in this paper. The resonant frequency of antenna is around 5 GHz, which is basically used for WLAN application. The design of antenna is done using Polystyrene substrate and copper as conducting material. Antenna parameters like return loss, band-width, gain and radiations patterns and VSWR are studied from this design, moreover design of antenna is planar type and can be flexible for usage.

Analysis of Proximity Coupled Microstrip Patch Antenna for Wireless Applications

Analysis of Proximity Coupled Microstrip Patch Antenna for Wireless Applications

DESIGN AND DEVELOPMENT OF A NOVEL FRACTAL ANTENNA FOR WIRELESS APPLICATIONS

An innovative concept is utilized to develop the fractal antenna by coalesce the Koch prefractal and meander line. This fractal antenna is proposed for multistandard wireless applications. The shape and dimensions of the proposed antenna are chosen to obtain the multiband behaviour as well as miniaturized structure. Initially two different fractal concepts have been chosen through previous research and merged them to obtain more than two resonant frequencies. The proposed design characterizes four bands at resonant frequencies 2.5 GHz, 6.4 GHz, 7.2 GHz and 8.15 GHz with a return loss of -12.05 dB, -16.68 dB, -14.87 dB and -26.51 dB respectively. This design also represents VSWR between the required range of 1 to 2 for the presented resonant frequencies with an appropriate value of gain in dB. The antenna is analysed with Ansoft HFSS-13.0 electromagnetic field solver.

Design of CPW-fed asymmetric slot UWB antenna for wireless application

A compact Ultra-WideBand (UWB) slot antenna is presented in this paper. The slot is modified rectangular in shape and asymmetrically cut in the ground plane. A hexagonal patch with two stepped CoPlanar Waveguide (CPW) feed is used to excite the slot. Wider impedance bandwidth is achieved due to the extra inductive reactance created by the asymmetric slot which neutralizes the capacitive reactance of the hexagonal patch. The measured impedance bandwidth of the proposed antenna is 11.85 GHz (2.9–14.75 GHz). The radiation patterns of the proposed antenna are obtained and found to be omni-directional in H-plane and bi-directional in E-plane.

A high gain compact coplanar stripline fed antenna for wireless applications

This article proposes a novel, open stub loaded high gain, asymmetric coplanar stripline antenna for IEEE 802.11a, HIPERLAN2, HiSWANa, WiMAX (IEEE 802.11e) and ISM 5.8 application bands. The proposed antenna has an overall dimension of 24 × 23 × 1.6 mm3 when printed on a substrate of er = 4.4 and has a 2:1 VSWR bandwidth of 23% at 5.35 GHz. The antenna exhibits a peak gain of 5.20 dBi at 5.35 GHz and a good omnidirectional radiation with an efficiency of 84%, which are validated by measurements. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1822–1826, 2014

Star-L-Shaped Circularly Polarized Ultra-Wideband Microstrip Antenna for Wireless Applications

The deployment of the wireless technology since FCC regulated the UWB technology spectrum was going rapidly. The wireless system that supports UWB, especially the antenna as the transducer should be UWB supported beside the other existed wireless technology, ease to fabricate and low cost. Not only that, The antenna performance should be has circular polarization to reduce misalignment. With the dimension of 60 x 60 mm made from FR-4 epoxy 0.8 mm thickness, and L-shape for the feedline with the star shape as the patch, the microstrip antenna can work at the frequency of 2 up to 9.8 GHz and has circular polarization in the frequency range of 2 up to 3.3 GHz.

Compact triple-band dual-polarized microstrip patch antenna for wireless applications

A compact and simple structure antenna with triple-band and dual-polarized for wireless local-area network (WLAN), worldwide interoperability for microwave access (WiMAX), and UWB applications is presented. This antenna consists of a microstrip feed line, a square annular slot and two embedded inverted L-shaped slots. The dimensions of the proposed antenna are 40 × 40 × 1.5 mm3. Based on the −10-dB return loss, the operating bands can be used in 2.4 GHz with circular polarization for WLAN, 3.8 GHz for WiMAX, and 6.2–8.3 GHz (28% at the operating frequency of 7.1 GHz) for UWB with linear polarization. Both experimental and simulated results show that the antenna is a good candidate for WLAN, WiMAX, and UWB applications. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:778–783, 2014

Design and Analysis of I-Slotted Rectangular Microstrip Patch Antenna for Wireless Application

This paper presents a novel design of a I- slotted patch antenna with compact nature and the study of various antenna parameters. The antenna is fed by inset feeding technique. The proposed patch antenna is designed and simulated on IE3D simulation software. The main aim of proposed work is to obtain a large bandwidth antenna with compact size . The proposed microstrip antenna has a wide bandwidth covering the range from 1.444-2.393 GHz. By using simple Inset feed technique & by introducing I-slotted wide bandwidth of 49.46%, High Gain 5dBi & good radiation efficiency of about 99% has been achieved. DOI: http://dx.doi.org/10.11591/ijece.v4i1.4594 Full Text: PDF

Analysis of L-probe Proximity Fed Annular Ring Patch Antenna for Wireless Applications

In the present paper, annular ring patch antenna with L-probe feeding has been analyzed using modal expansion cavity model. The proposed antenna shows wide band and ultra wide band operation which depends on the position of L-probe feeding and position of the shorting pin. For the fundamental $$\hbox {TM}_{11}$$ TM 11 mode, the bandwidth and gain is found to be 38.85 % and 7.8 dBi while for higher order $$\hbox {TM}_{12}$$ TM 12 mode bandwidth is obtained 58.71 % with corresponding gain of 6.1 dBi. The effect of shorting pin on the proposed antenna is also studied and it is found that the radiating structure is more compact in nature and improves the bandwidth upto 47.37 % with 8.0 dBi gain. Further, the proposed antenna has broadside radiation pattern over the entire bandwidth. The theoretical results are compared with IE3D simulated results which are in good agreement.

A Novel Design Approach of Reconfigurable Patch Antenna for Wireless Applications

In this paper we have proposed an innovative design for a reconfigurable micro strip patch antenna for wireless applications. It has a central patch antenna operating at 7.5 GHz called as driven patch; with two adjacent wing patches which when connected with the central patch reconfigure the operating frequency to 5.5 GHz and 2.9 GHz. The design is performed by using 3D electromagnetic simulator HFSS considering ideal MEMS switches.

Design and Analysis of Multiband Hybrid Coupled Octagonal Microstrip Antenna for Wireless Applications

This study deals with a design procedure of microstrip patch antenna for wireless application. The proposed octagon shaped hybrid coupled microstrip antenna for multiband operation is pertinent in wireless application. By exciting two orthogonal modes by 90° time phase difference in hybrid coupling circular polarization is obtained. The gain is enhanced by introducing tapering at the end of hybrid coupling. The design simulation is done using Method of Moment based software. The proposed antenna is resonating in the frequency range of 2-4 GHz. Hybrid coupled octagonal patch antenna having gain of 9.11 dB and the directivity of 8.98 dB. Power radiated by this antenna is 0.038 watts.

Design of co-axial fed broadband single layer rectangular microstrip patch antenna for wireless applications

In present work, a novel co-axial fed single layer E-shaped rectangular micro strip patch antenna with broadband behavior for wireless local area network (WLAN) and world-wide interoperability for microwave access (Wi-MAX) applications is proposed. The micro strip antenna has a planar geometry that consists of a ground, a substrate, a patch, and a feed. The basic theory about the proposed structural design, impedance matching, and the radiation characteristics are studied and analyzed using method of finite difference time domain technique. Simulation was conducted using computer simulation technology microwave studio software for optimization of antenna's properties. The proposed antenna has a frequency bandwidth of about 712 MHz (5.16-5.88 GHz) at −10 dB return loss which is sufficient to make the antenna useful for 5.2/5.8 GHz WLAN and 5.5 GHz Wi-MAX application. The WLAN standard requires the antenna to cover 5.15-5.35 GHz and 5.725-5.825 GHz frequency bands and Wi-MAX requires the antenna to cover 5.25-5.85 GHz frequency band. Maximum achievable gain over the entire frequency band is 5.5 dBi. To meet the demanding bandwidth specification, a substrate of low dielectric constant is selected to obtain a compact radiating structure. Furthermore, reflection coefficient is below −10 dB over the entire frequency band at the input of the optimized E-shaped micro strip patch antenna with 50-Ω system impedance.

Design of a compact broadband circularly-polarized slot antenna for wireless applications

This article presents design of a compact broadband circularly-polarized square slot antenna with a coplanar waveguide feed.A circular polarization bandwidth larger than 64.7% (3172-6211 MHz) obtained with the proposed antenna by embedding two inverted-L grounded strips and a 45° bended strip around corners, whereas the impedance bandwidth can be greatly improved through the tuning stubs. 3 dB axial ratio bandwidth of the proposed CP antenna is large as 64.7% in a frequency band of 3172-6211 MHz. The CP antenna operates in a frequency range from 2.25 to 6.75 GHz and 8.25 to 10.25 GHz with VSWR < 2 impedance bandwidth. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:413-418, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27303