Antenna For Ultra-wideband Applications Research Articles

Design of a square ring shape slot antenna for UWB polarization–diversity applications

In this paper, a dual polarized slot antenna for ultra wideband applications is proposed. The slot has an overall shape of a square ring whose four arms are identical and stepped rectangular. While two adjacent arms of the ring are microstrip fed and are responsible for the orthogonally polarized fields, the other two arms are introduced to make the structure symmetric and reduce the cross polarization. The impedance matching and isolation are controlled by properly shaping the slot arms and the feed section and by insertion of several narrow metallic and slot stubs. The measured impedance bandwidth is 116% (from 3.2GHz to 12.0GHz) for both the ports. The isolation is better than 20dB from 4.4GHz onwards. With the help of radiation patterns and electric field distribution inside the slot, the dual polarized nature of the antenna is justified. A modified design having measured isolation of 18dB from 3.5GHz onwards is also presented. With compact features, huge impedance bandwidth, good isolation and acceptable cross polar levels along the boresight direction, the antenna is expected to be useful for UWB transmission incorporating MIMO, radar and medical imaging applications.

Novel ACS-fed monopole antenna for UWB applications with sharp selectivity notched band and additional bluetooth band characteristics

A novel asymmetric coplanar strip feed (ACS-fed) ultra-wideband (UWB) antenna with sharp selectivity band-notched characteristics is proposed and fabricated in this paper. The high selectivity notched band, ranging from 5.0 GHz to 5.9 GHz, is achieved by coupling the parasitic strip embedded in the ground plane and the slit etched on the radiation patch. The notched band can be easily controlled by adjusting the width or the length of the strip and the slit. Moreover, due to the unique antenna structure, the proposed antenna obtains a Bluetooth band (2.4–2.5 GHz) and two stop bands (3.3–3.8 GHz and 5.0–5.9 GHz). The antenna is printed on a very small (10 mm × 25 mm × 1 mm) substrate. Finally, the proposed compact ACS-fed UWB antenna is successfully simulated, designed and measured, showing good impedance matching, stable gain and near omni-directional radiation patterns.

Reconfigurable dual‐port UWB diversity antenna with high port isolation

A reconfigurable dual-port diversity antenna for ultra-wideband application is presented. The proposed design can be configured either in stacked/back-to-back arrangement by placing radiating elements facing in the opposite directions or in orthogonal arrangement. The proposed designs are realised on FR4 substrate of dimensions 40 × 36 × 1.5 mm. By introducing an efficient decoupling structure in the ground plane, both configurations maintain an isolation better than 25 dB over the complete band. Performance of the proposed design is verified by the measured results including s-parameters, envelope correlation coefficient, total active reflection coefficient and channel capacity loss. The proposed design is suitable for integration in three-dimensional (3D) system-in-package applications.

Analysis of Fractal Antenna for Ultra Wideband Application

Aims of this study are to design a simple and compact microstrip-fed Ultra Wide Band (UWB) printed fractal antenna and analyze the performance of the antenna for different iterations. A second iteration of a triangle patch antenna is proposed to perform UWB. Based on the result, the proposed antenna occupies about 6.73 GHz bandwidth covering 3.52-10.24 GHz. The bandwidth is increased about 54.15% for the first iteration of proposed antenna and 69.5% increased for second iteration. A radiation pattern in H-plane and E-plane is also obtained. H-plane of radiation pattern is performed as omni directional and E-plane perfomed like a dipole antenna. Coplanar wave guide is approached to obtain ultra wideband.

CPW-Fed Ring Antenna For UWB Applications

This paper presents a Coplanar waveguide feed ( CPW) monopole ring antenna for ultra wideband applications. The proposed antenna consist of ring type patch embedded with horizontal strip in the patch. The parametric study is performed to understand the characteristics of the proposed antenna. The antenna exhibits impedance bandwidth from 3.7 GHz to 10.7 GHz. The various antenna parameters are studied. The proposed antenna is suitable for UWB applications.

Dual Band-Notched Small Monopole Antenna with Enhanced Bandwidth for UWB Applications

This article proposes a novel printed monopole antenna for ultra wideband applications with dual band-notch function. The antenna consists of a disc-shaped radiating patch with a pair of folded str...

Design of horizontally polarized stepped slot antenna for ultra-wideband applications

A horizontally polarized ultra wideband stepped slot antenna is proposed in this paper. First, a stepped-slot structure is fed by an L shaped microstrip feed to achieve multiple resonances. Then a parasitic slot is introduced near the vertical arm of the L-shaped feed to get better impedance matching over the bandwidth of 3.7 GHz (5.0–8.7 GHz). Further, an impedance step is introduced in the feed line and the measured −10 dB impedance bandwidth covering from 2.8 to 12.8 GHz is achieved. The measured peak gain is around 4.5 dBi throughout the band. The measured radiation patterns are bidirectional in E plane and omnidirectional in H plane. The experimental results are in close agreement with the simulated results. This antenna can be used for ultra-wideband communication devices, medical imaging and vehicular radars.

A Compact planar diversity antenna for ultra-wideband application with band-notched function

A compact two-element diversity planar antenna for ultra-wideband (UWB) application with band-notch function is proposed. By adapting two symmetrical rectangular patches with three bevels cutting in the edge of the radiators, the antenna provides wideband impedance matching characteristics over the desired frequency range. The wideband isolation can be achieved through uniform branch length ratio used in the ground plane. Measured S-parameters show that the antenna is able to cover the entire UWB band from 3.1–10.6 GHz and good isolation of less than -25 dB. Also it has a band-notch function to avoid overlap with the 3.5 GHz WiMAX band. The radiation pattern, realized gain, envelope correlation, and pulse handling capacity are measured. From the results, it is observed that the proposed diversity antenna can be suitable for UWB application. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:758–762, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27435

A SIMPLE UWB ANTENNA WITH DUAL STOP-BAND PERFORMANCE USING RECTANGULAR SLOT AND STRIP LINE ENDED UP SHORTING PIN

This paper presents a new rectangle-slot antenna for ultra wideband applications with 3.5/5.5GHz dual stop-band characteristics. The antenna contains a simple square radiating patch and a rectangle-slot ground plane, which provides a wide bandwidth from 2.6GHz up to 14.1GHz. In order to obtain dual stop-band properties at 3.5 and 5.5GHz, a rectangular-shaped slot is etched ofi the ground plane, and a strip line ended up a shorting pin is applied, respectively. The antenna is simple in conflguration and has a compact dimension of 20£22mm 2 . The proposed antenna is designed, simulated and fabricated. The measured results exhibit a acceptable agreement with the simulated data. The antenna provides nearly omnidirectional radiation patterns, relatively ∞at gain over the entire UWB frequency excluding the two stop bands.

Multiobjective-Optimized Design of a New UWB Antenna for UWB Applications

A multiobjective genetic algorithm has been applied to design a new printed, bow-tie antenna for ultrawideband applications, that is, ground penetrating radar, short range and high data rate communications, and so forth. The ultrawideband performance with respect to antenna impedance and gain is achieved by an optimized resistive loading profile and flare angle. A low-cost prototype is manufactured and numerical simulations are validated with measurements.

Directive Stacked Patch Antenna for UWB Applications

Directional ultrawideband (UWB) antennas are popular in wireless signal-tracking and body-area networks. This paper presents a stacked microstrip antenna with an ultrawide impedance bandwidth of 114%, implemented by introducing defects on the radiating patches and the ground plane. The compact (20×34 mm) antenna exhibits a directive radiation patterns for all frequencies of the 3–10.6 GHz band. The optimized reflection response and the radiation pattern are experimentally verified. The designed UWB antenna is used to maximize the received power of a software-defined radio (SDR) platform. For an ultrawideband impulse radio system, this class of antennas is essential to improve the performance of the communication channels.

Compact ultra-wideband CPW-fed fan-shaped antenna with dual band-notched characteristics using ARC-shaped slots

In this article, a compact coplanar waveguide-fed fan-shaped monopole antenna for ultra-wideband applications with dual band-notched characteristics is proposed and studied. The antenna with fan-shaped structure occupies a small size of 35 × 30 mm2. With a pair of arc-shaped slots introduced on the radiating patch, two frequency-notched responses at 3.5/5.5 GHz are obtained. The antenna structure is designed, fabricated, and tested. The band-notched characteristics, VSWR, radiation patterns, gains within the operating band have been observed. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:368–371, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27328

Compact ultra-wideband coplanar waveguide fed fan-shaped antenna with band-notched characteristic

In this article, a compact coplanar waveguide fed fan-shaped monopole antenna for ultra-wideband applications with band-notched characteristic is presented. The antenna with fan-shaped structure occupies a small size of 35 × 30 mm2. An arc-shaped slot locating on the radiating element is used to create the 3.5 GHz band-notch characteristic. And, good radiation patterns and gains within the operating band have been observed. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:62–65, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27224

Band‐notched small square slot antenna for ultra‐wideband applications

AbstractIn this article, a novel printed slot antenna for ultra wideband applications with variable frequency band‐notch characteristic is presented.The proposed antenna consists of a modified radiating stub with a pair of L‐shaped slits and a ground plane with two T‐shaped parasitic structures, which provides a wide usable fractional bandwidth of more than 135% (2.81–5.1 GHz) while showing the band rejection performance in the frequency band of 5 to 6 GHz. By cutting a pair of L‐shaped slits with variable dimensions on the radiating stub frequency band‐stop performance is generated and we can control its characteristics such as band‐notch frequency and its bandwidth. The designed antenna has a small size of 20 × 20 mm2. Simulated and experimental results obtained for this antenna show that it exhibits good radiation behavior within the UWB frequency range. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1138–1143, 2012

Band‐notched low profile monopole antenna with enhanced bandwidth by using an inverted T‐shaped parasitic structure and a pair of G‐shaped slots

AbstractIn this letter, a novel printed monopole antenna for ultra wideband applications with variable frequency band‐notch characteristic is presented.The proposed antenna consists of a forked‐shaped radiating patch with an inverted T‐shaped parasitic structure and a ground plane with a pair of G‐shaped slots, which provides a wide usable fractional bandwidth of more than 130% (2.9–14.1 GHz). To generate frequency band‐stop performance, the forked‐shaped strips are folded back and result in a pair of coupled lines on the radiating patch that we can control band‐stop performance characteristics such as band‐notch frequency. By inserting an inverted T‐shaped parasitic structure on the radiating patch and also by cutting a pair of G‐shaped slots with variable dimensions on the ground plane, additional resonances are excited and hence much wider impedance bandwidth can be produced, especially at the higher band. The designed antenna has a small size of 10 × 16 mm2 while showing the band rejection performance in the frequency band of 5–6 GHz. Simulated and experimental results obtained for this antenna show that it exhibits good radiation behavior within the UWB frequency range. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1123–1127, 2012

Design of printed dipole antenna for ultra wideband applications

Design and performance measures of an ultra wideband (UWB) printed dipole antenna suitable for UWB systems are presented. The proposed antenna operates in the frequency range 3.18–12.45 GHz with impedance bandwidth (VSWR < 2) of 9.27 GHz and maximum gain of 6.04 dBi. It consists of five dipole strips of different resonant length combined orthogonally for effective signal reception and better performance. The radiation pattern is nearly omnidirectional in both elevation and azimuth plane, the consistency of the radiation pattern exists for all frequency within the operating band. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:748–751, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26611

Compact Bow-Tie Quasi-Self-Complementary Antenna for UWB Applications

In this letter, a bow-tie quasi-self-complementary antenna (QSCA) for ultrawideband (UWB) applications is presented and discussed. By a coplanar waveguide (CPW)-like matching technique, the proposed antenna provides a broad VSWR <; 2:1 impedance bandwidth from 3.04 to 11.47 GHz. This feature is in favor of covering the required bandwidth from 3.1 to 10.6-GHz UWB operations. Additionally, the compact size (10 × 35 mm2) of the antenna is favorable for integration with wireless communication devices on restricted radio-frequency elements space.

A triple band‐notched planar monopole antenna for ultrawide band applications

AbstractThis article presents the compact planar antenna with 3.5/5.5/8.2 GHz triple band‐notched characteristics. The antenna consists of an octagon shape patch with 50 Ω transmission line. By etching two C‐shaped slots in the patch and adding pair of L‐shaped resonator coupled to the radiating patch, band‐rejected filtering properties in the WiMAX/WLAN/ITU bands are achieved. The proposed ultrawide band (UWB) antenna is optimized to operate in the frequency band from 3 to 11 GHz for VSWR &lt; 2. Measured results confirm that the antenna is suitable for UWB applications because of its compact size and high performance. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:539–543, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26581

Enhanced bandwidth small E‐Shaped monopole antenna for UWB applications with variable frequency band‐notch function

AbstractIn this article, a novel printed monopole antenna for ultra wideband applications with variable frequency band‐notch characteristic is presented.The proposed antenna consists of an E‐shaped radiating patch with two L‐shaped arms and a T‐shaped arm which provides a wide usable fractional bandwidth of more than 130% (2.9–14 GHz). By inserting two modified L‐shaped arms with variable dimensions on the E‐shaped radiating patch frequency band‐stop performance is generated and also by inserting T‐shaped arm this performance is improved. We can control band‐stop performance characteristics such as band‐notch frequency and its bandwidth. The designed antenna has a small size of 10 × 17 mm2 while showing the band rejection performance in the frequency band of 5.01–5.98 GHz. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:267–271, 2012 View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26487

On the design of inscribed pentagonal‐cut fractal antenna for ultra wideband applications

AbstractThe article presents the CPW‐feed inscribed pentagonal‐cut fractal antenna. This planar monopole antenna has been designed on low cost FR4 substrate of εr = 4.3 and thickness h = 1.53 mm. The proposed antenna has been fabricated with optimized dimension. The experimental result of this antenna exhibits the ultra wideband from 2.5 to 15 GHz. The antenna has been simulated using EM simulator based on finite element method. The experimental and simulated results are in good agreement. The radiation patterns of this antenna are omnidirectional in H‐plane and bidirectional in E‐plane, respectively. The measured group delay is almost flat throughout the band. This antenna can be useful for UWB system, microwave imaging and vehicular radar. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2828–2830, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26415