Antenna For Wireless Applications Research Articles

New compact UWB microstrip-fed printed planar antenna for wireless applications

A proposed circular patch antenna with notchcut fed by a simple microstrip line is described in this paper. It is designed for ultra-wideband (UWB) wireless communications and applications over the band 3.1–10.6 GHz. This antenna consists of a circular patch with notchcut fed by a microstrip line, one transition step, and a partial ground plane. The 2:1 voltage standing wave ratio (VSWR) bandwidth (S11< − 10 dB) of the proposed antenna covers the entire UWB application range specified by Federal Communications Commission (FCC) that is from 3.1 to 10.6 GHz. The proposed antenna is able to achieve an impedance bandwidth about 8.6 GHz (2.4–11 GHz). The return loss, VSWR, radiation pattern, radiation efficiency, gain, group delay, and current distribution of the proposed antenna are included in this paper. The simulation results and proposed antenna design details are presented by CST Microwave Studio.

Dual band dielectric resonator antenna for wireless application

The proposed technique is an integration of a slot antenna and a dielectric resonator antenna (DRA). This is designed without compromising miniaturisation and efficiency. It is observed that the integration of slot and dielectric structure itself may be merged to achieve extremely wide bandwidth over which the antenna polarisation and radiation pattern are preserved. Here the effect of slot size on the radiation performance of the DRA is studied. The antenna structure is simulated using the CST software. The simulated results are presented and compared with the measured result. This DRA has a gain of 7.1 and 6.3 dBi at 5.7 and 8.1 GHz, respectively, its 10 dB return impedance bandwidth of nearly 4.5% and 5.5% at two resonating frequencies. A total of 98% efficiency has been achieved from the configuration. It is shown that the size of the slot can significantly affect the radiation properties of the DRA and there are good agreements between simulation and measured results.

A single-feed tri-band circularly polarized dual-annular slot antenna for wireless applications

A novel single-feed tri-band circularly polarized (CP) dual-annular slot antenna is presented. The antenna structure is composed of two nonconcentric annular slots fed by a novel inverted h-shaped microstrip line configuration. Compared to most of the previously reported tri-band CP antenna structures, the proposed antenna has low profile, compact in size, and easy to fabricate on the single-layer PCB. It is easy for the antenna to match all the three frequency bands by employing an h-shaped feeding line. The antenna also can provide a conical radiation pattern at the third band. A sample design of a tri-band CP antenna operated at 1.58, 2.42, and 3.0 GHz is realized. Details of the experimental results compared with simulated results are presented and discussed. The proposed compact tri-band CP antenna design is suitable for mounting onto the mobile communication devices and portable positioning systems.

Printed dual ring loop antenna for wireless applications

A wideband printed dual ring loop antenna is presented for the 5.2/5.4/5.8 GHz wide local area network (WLAN) and intelligent transfer system (ITS) band applications. The proposed antenna consists of dual ring loops, which are radiating ring loop and modified ring loop by ground plane. This antenna is fed by a coplanar waveguide. This provides wideband performance and relatively good matching. Considering a return loss criterion of less than 10 dB, the antenna operates in frequency bands of 4.83–6.25 GHz. A parametric study has also been conducted by varying the spacing between the dual rings to analyze its effect on the resonant frequency. The operating frequency bands of the antenna are able to support WLAN (5.15–5.825 GHz) and ITS (5.75–6.25 GHz) bands. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1093–1097, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26701

Plus Shape Slotted Fractal Antenna for Wireless Applications

Fractal antennas are characterized by space filling and self-similarity properties which results in considerable size reduction and multiband operation as compared to conventional microstrip antenna. This paper outlines a multiband antenna design based on fractal concepts. Fractal antennas show multiband behavior due to self-similarity in their structure. The plus shaped fractal antenna has been designed on a substrate of dielectric constant EURr = 4.4 and thickness 1.6mm. The proposed antenna is characterized by a compact size and it is microstrip feed fractal patch of order 1/3. It is observed that the antenna is radiating at multiple resonant frequencies. The resonant frequency is reduced from 2.2 GHz to 900 MHz after I & II iterations respectively. Thus considerable size reduction of 81.77% & overall bandwidth of 12.92% are achieved. The proposed antenna is simulated using the method of moment based commercial software (IE3D) and it is found that simulated results are in good agreement with the experimental results.

High Gain Array of Monopoles-Coupled Antennas for Wireless Applications

An array of monopole antennas over a ground plane that radiates a directive lobe in the end-fire direction are described in this paper. The design uses the rigorous method described by Drouet et al. 2008 in order to synthesize the radiation through the strong cumulative coupling between the monopoles. A gain higher than 20 dB was achieved in the end-fire direction over a 4.5% bandwidth. However, the antenna has been tilted in order to compensate the beam deviation caused by the edge diffraction. A prototype with 12 elements has been manufactured in order to validate the antenna principle and the whole antenna is successfully measured. The prototype was studied with the software CST-Microwave Studio and the feed network has been designed with Agilent ADS.

Design Analysis of Slotted Planar Antenna for Wireless Applications

Design Analysis of Slotted Planar Antenna for Wireless Applications

CPW-fed-slot planar antenna for wireless applications

A compact dual-band antenna for wireless applications is proposed. The proposed antenna provides 2:1 voltage standing wave ratio (VSWR) impedance bandwidth of 590 MHz centered at 2.6 GHz and 3.09 GHz centered at 6.19 GHz. The antenna is fabricated on a substrate of dielectric constant 4.4 and thickness 1.6 mm, occupies an area of 36.9 × 18 mm2. Details of the proposed antenna design along with experimental and simulation results are presented. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2501–2504, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26315

Computer Aided Design and Simulation of a Multiobjective Microstrip Patch Antenna for Wireless Applications

The utility and attractiveness of microstrip antennas has made it ever more important to find ways to precisely determine the radiation patterns of these antennas. Taking benefit of the added processing power of today’s computers, electromagnetic simulators are emerging to perform both planar and 3D analysis of high-frequency structures. One such tool studied was IE3D, which is a program that utilizes method of moment. This paper makes an investigation of the method used by the program, and then uses IE3D software to construct microstrip antennas and analyze the simulation results. The antenna offers good electrical performance and at the same time preserves the advantages of microstrip antennas such as small size, easy to manufacture as no lumped components are employed in the design and thus, is low cost; and most importantly, it serves multiple wireless applications.

A novel dual-band square piece patch antenna for wireless applications

A novel dual-band square microstrip patch antenna for bandwidth improvement and antenna size reduction in a single design is proposed. It can operate at dual frequencies of 1.7 GHz and 5.5 GHz. The fundamental parameters of the antenna such as bandwidth, return loss, gain, radiation pattern, and polarization are obtained. This square piece patch antenna has less return loss of −40 dB with bandwidth of 40 MHz and 200 MHz in two bands, respectively. The sensitivity of patch antenna towards its patch shape is also discussed. Simulation tool, based on the method of moments (ZELAND IE3D version 12.0) has been used to analyze and optimize the antenna. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1513–1516, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25270

Novel printed CPW‐FED slot antenna for wireless applications

AbstractA novel design of compact coplanar waveguide (CPW)‐fed slot antenna for wireless applications is presented. It can operate in the IEEE 802.11a frequency band from 5 GHz to 5.5 GHz. The antenna is designed on a RT/duroid 5880 substrate with a permittivity 2.22 and with the size of 18.8 mm × 12.3 mm × 3.175 mm. The antenna has a 5% voltage standing wave ratio (VSWR) (2.3:1) bandwidth around 5.24 GHz. The fundamental parameters of the antenna, such as impedance, return loss, VSWR, and polarization are obtained. All meets the acceptable antenna standards. Simulation tool, based on the method of moments (ZELAND IE3D version 12.0), has been used to analyze and optimize the antenna. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1258–1261, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25210

Dual-feed PIFA diversity antenna for wireless applications

A novel dual-feed planar inverted-F antenna (PIFA) suitable for wireless diversity/MIMO applications is presented. By exploiting the pattern diversity, successful provision of two isolated feeding ports using one common radiating plate has been achieved. The main technique introduced is to etch the ground plane under the radiating plate to reduce the mutual coupling between the two ports. It is found that the envelope cross-correlation is less than 0.02 and the ratio of the mean effective gain between the two ports is close to unity. Thus, this new PIFA antenna can provide a better solution than two separate antennas for diversity and MIMO applications by saving space and cost. Simulated and measured results verify the conclusion.

Triple-frequency meandered monopole antenna with shorted parasitic strips for wireless application

The performance of a triple-frequency meandered-strip monopole antenna for wireless application is presented. The proposed antenna comprises of a microstrip-fed monopole with an additional meandered strip and a ground plane with three protrudent strips on the opposite side of the substrate. By adding these shorted parasitic strips to this monopole, good impedance matching for multi-band application is obtained. Tuning effects of the additional shorted strips to the different resonant modes were examined and prototype of the proposed antenna had been constructed and experimentally studied. The measured results explore a broadband triple-frequency operation covering the required bandwidths of the PCS-1900/UMTS-2100 and the 2.4/5.2/5.8 GHz WLAN standards, a near-directive radiation pattern and a good antenna gain for this design.

Design of planar inverted - F antenna for wireless applications

The design of single feed dual band PIFA operating at 2.25and 3.546 GHz is presented. Two dimensional method of moments (MOM) electromagnetic simulator, IE3D version: 12, is used in the design simu...

A new broadband hybrid bow‐tie antenna for wireless applications

AbstractThe main goal of this letter is to increase the impedance bandwidth of a hybrid bow‐tie antenna with end‐fire radiation pattern by combining with slots and a patch radiator. The proposed antenna simplify the structure of an antenna with the merits of light weight, low cost, ease fabrication for many wireless and mobile applications. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1905–1908, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24463

Electromagnetic simulation of complex and electrically large structures in WIPL-D Pro [Application Notes

This article has demonstrated the application of higher order basis functions, smart reduction of expansion orders, and multilevel fast multipole method in efficient 3-D EM simulation of complex and electrically large structures (from compact multiband antenna for wireless applications to 160 lambda long aircraft scatterer) at a desktop computer.

A Novel Broadband Design of a Printed Hexangular Slot Antenna for Wireless Applications

A novel compact hexangular slot antenna with small hexangular slots that are placed at the each corner of hexagon printed on a dielectric substrate and fed by a 50Ω microstrip is presented. Both impedance and radiation characteristics of this antenna are studied. Experimental results indicate that a 2:1 VSWR bandwidth of 3.5 GHz is achieved at operating frequencies from approximately 2.1 to 5.6 GHz, which is several times that of a convectional printed wide-slot antenna. The good radiation characteristics of the constructed prototype antenna are also shown in this article. The broadband bandwidth and good radiation properties of the proposed design are suitable for most wireless applications.

Novel ultrawideband and multiband triangular planar inverted F antenna for wireless applications

AbstractA novel multi‐ and ultrawideband operation of a single feed triangular antenna are presented. For multi and UWB operation, the proposed design are achieved by inserting U shaped slot on the triangular PIFA with unequal arms, choosing between multi and ultrawide band by adjusting feeding position. Five resonant band of multi band operation is obtained in S‐band, Q‐band, bluetooth band, and WLAN band with acceptable impedance bandwidth. There is an increase in the number of resonant operating frequencies by etching U slot on the shorting feed plate. Ultrawideband is achieved by adjusting coaxial feed to obtained impedance bandwidth 27%. Enhancement impedance bandwidth by using folded shorting plate to improving bandwidth to achieve ultrawide bandwidth around 53%. The proposed antennas have acceptable gain around 11.5 dB. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2039–2043, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22576

Development of Multi-Broadband Planar Wire Antennas for Wireless Applications

A new type of multi-broadband antennas is developed for wireless applications. The broadband performance of this type of antennas is achieved by introducing a small gap on a wire loop while the multi-band operation is realized by simultaneously exciting one or more additional wire elements. Three antenna configurations are investigated for single-, dual-, and triple-broadband operations. The dual-broadband operation is obtained by employing a combination of a loop and a monopole. The triple-broadband antenna consists of a loop, a monopole, and an inverted-L structure. It is demonstrated that the multi-broadband antennas can achieve a bandwidth of 30% in the 1GHz band, 50% in the 2 GHz band, and 40% in the 5 GHz band, which cover the frequency bands for AMPS/PCS, GSM/DCS, PDC/PHS, and IMT-2000 mobile communications as well as for 2.4-GHz and 5-GHz wireless applications.

Reconfigurable dual-band circularly polarized microstrip patch antenna for wireless applications

A new design of reconfigurable single-feed circular patch microstrip antenna for dual-band circular polarization application is proposed. The dual-band functionality is realized through incorporating cross-slots of equal slot length in the circular patch and utilizing two PIN diodes to switch the slots on or off. A pairs of tuning stubs are used to tune the circular polarization performance. The design process is presented and good results were obtained.