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Journal ArticleDOI

UWB Antenna With Single or Dual Band-Notches for Lower WLAN Band and Upper WLAN Band

14 Jul 2009-IEEE Transactions on Antennas and Propagation (IEEE)-Vol. 57, Iss: 12, pp 3942-3950
TL;DR: In this paper, the authors proposed a band-notched ultrawideband (UWB) antenna with independent controllable strips in terms of the notch frequency and the width of the band notches.
Abstract: To prevent interference problems due to existing nearby communication systems within an ultrawideband (UWB) operating frequency, the significance of an efficient band-notched design is increased. Here, the band-notches are realized by adding independent controllable strips in terms of the notch frequency and the width of the band-notches to the fork shape of the UWB antenna. The size of the flat type band-notched UWB antenna is etched on 24 times 36 mm2 substrate. Two novel antennas are presented. One antenna is designed for single band-notch with a separated strip to cover the 5.15-5.825 GHz band. The second antenna is designed for dual band-notches using two separated strips to cover the 5.15-5.35 GHz band and 5.725-5.825 GHz band. The simulation and measurement show that the proposed antenna achieves a wide bandwidth from 3 to 12 GHz with the dual band-notches successfully.
Citations
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Journal ArticleDOI
TL;DR: In this paper, a new approach is proposed to reject certain bands within the passband of an ultra-wideband planar monopole antenna, which utilizes a mushroom-type electromagnetic-bandgap (EBG) structure.
Abstract: A new approach is proposed to reject certain bands within the passband of an ultra-wideband planar monopole antenna. The proposed approach that utilizes a mushroom-type electromagnetic-bandgap (EBG) structure is proven to be an effective way for band-notched designs. The approach has many advantages, such as notch-frequency tunability, notch-band width controllable capacity, efficient dual-notch design, and stable radiation patterns. Several design examples using conventional mushroom-type EBG and edge-located vias mushroom-type EBG are presented. The examples exhibit good bandstop characteristics to reject the wireless local-area network interference bands (5.2- and 5.8-GHz bands). Besides, the causes that lead to the discrepancies between the simulations and measurements are discussed.

180 citations


Cites background or methods from "UWB Antenna With Single or Dual Ban..."

  • ...In [14] and [22], multielements are used to generate multinotches....

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  • ...It is due to the space restriction and the coupling between the two strips....

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  • ...The conventional methods are cutting slots on the patch/ground plane [8]–[12] and putting parasitic elements close to the radiator [13]–[16]....

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Journal ArticleDOI
TL;DR: In this article, a small-size microstrip-fed multi-band planar monopole antenna is presented, which covers the frequency bands 1.3, 1.8, 2.4 and 3.6 GHz.
Abstract: A small-size microstrip-fed multi-band planar monopole antenna is presented. The base of the proposed antenna is a diamond-shaped-patch (DSP) that covers the ultrawideband (UWB) frequency range. To create a multi-band antenna, several narrow strips, acting as resonance paths, can be integrated with the DSP antenna. It is shown that by removing the centre part of the DSP antenna, without distorting the UWB behavior, quarter-wavelength strips can be added to the notched region. This will not affect the dimension of the base antenna. The designed quad-band antenna has a substrate size of 16 × 22 mm2 and covers the frequency bands 1.3, 1.8, 2.4 and 3.1-10.6 GHz which includes GPS, GSM, WLAN and UWB. Dual-, triple- and quad-band antennas are simulated and good results are obtained. The antennas have omnidirectional and stable radiation patterns across all the relevant bands. Moreover, relatively consistent group delays across the UWB frequencies are noticed for the base, dual- and triple-band antennas, and slightly distorted for the quad-band antenna. A prototype of the quad-band antenna is fabricated and measured results are compared with simulated results.

162 citations


Cites background from "UWB Antenna With Single or Dual Ban..."

  • ...multi-band behavior, notches are then introduced into the antenna [10],...

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Journal ArticleDOI
TL;DR: A compact triple band-notch UWB antenna, designed for the rejection of interference with Worldwide Interoperability for Microwave Access (WiMAX), lower and upper wireless local area networks (WLANs), and three notched bands by only one structure with simple design is presented in this communication.
Abstract: In order to prevent interference problem due to existing nearby communication systems within the UWB operating frequency, a compact triple band-notch UWB antenna is presented in this communication. This antenna, designed for the rejection of interference with Worldwide Interoperability for Microwave Access (WiMAX), lower and upper wireless local area networks (WLANs) covering 3.3-3.6 GHz, 5.15-5.35 GHz and 5.725-5.825 GHz, provides three notched bands by only one structure with simple design. Based on simulation and measurement, it shows that the proposed antenna can guarantee a wide bandwidth from 3.03 to 11.4 GHz with triple unwanted band-notches successfully.

151 citations


Cites methods from "UWB Antenna With Single or Dual Ban..."

  • ...Generally, the existing techniques in extensive use can be classified into the following two categories: One method focuses on loading diverse parasitic elements on the antennas, such as strip near patch [8], split ring resonators (SRRs) or stepped impedance...

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  • ...Based on the UWB antenna techniques in literatures [2], [8] and [22], a compact planar UWB antenna is presented in Fig....

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Journal ArticleDOI
TL;DR: In this article, four band-notched antennas suitable for ultra-wideband (UWB) applications are proposed, and the results of both simulation and measurement confirm that the gain suppression of the single and multiple band notched antennas in each desired notched band are over 15 dB and 10 dB, respectively.
Abstract: To mitigate potential interferences with coexisting wireless systems operating over 3.3-3.6 GHz, 5.15-5.35 GHz, or 5.725-5.825 GHz bands, four novel band-notched antennas suitable for ultra-wideband (UWB) applications are proposed. These include UWB antennas with a single wide notched band, a single narrow notched band, dual notched bands, and triple notched bands. Each antenna comprises a half-circle shaped patch with an open rectangular slot and a half-circle shaped ground plane. Good band-notched performance is achieved by using high permittivity and low dielectric loss substrate, and inserting quarter-wavelength horizontal/vertical stubs or alternatively embedding quarter-wavelength open-ended slots within the feed line. The results of both simulation and measurement confirm that the gain suppression of the single and multiple band-notched antennas in each desired notched band are over 15 dB and 10 dB , respectively. The radiation pattern of the proposed triple band-notched design is relatively stable across the operating frequency band.

128 citations


Cites background or methods from "UWB Antenna With Single or Dual Ban..."

  • ...Some designs with dual band-notched property are achieved by utilizing a couple of half-wavelength parasitic elements in an open rectangular slot [21], embedding dual C-shaped slots on the radiator [22], or inserting dual quarter-wavelength stubs [23]....

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  • ...The corresponding highest at these notched bands are 0.24 dB, 0.86 dB, and 0.79 dB which represent 72.39, 20.22, and 22 of VSWR values, respectively....

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  • ...The highest for the lower and upper notched bands are 0.62 dB and 0.7 dB which are equivalent to 28.03 and 24.83 of VSWR, respectively....

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  • ...VSWR [21], [22], [24] at each notched frequency or limited gain suppression 10 dB in the notched band [21]–[23]....

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  • ...It is also interestingly found that the at 5.8 GHz is dB which is corresponding to 54.29 of VSWR....

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Journal ArticleDOI
TL;DR: In this article, a printed reconfigurable ultra-wideband (UWB) monopole antenna with triple narrow band-notched characteristics is proposed for cognitive radio applications, which can work at eight modes by controlling switches ON and OFF.
Abstract: A printed reconfigurable ultra-wideband (UWB) monopole antenna with triple narrow band-notched characteristics is proposed for cognitive radio applications in this paper. The triple narrow band-notched frequencies are obtained using a defected microstrip structure (DMS) band stop filter (BSF) embedded in the microstrip feed line and an inverted π-shaped slot etched in the rectangular radiation patch, respectively. Reconfigurable characteristics of the proposed cognitive radio antenna (CRA) are achieved by means of four ideal switches integrated on the DMS-BSF and the inverted π-shaped slot. The proposed UWB CRA can work at eight modes by controlling switches ON and OFF. Moreover, impedance bandwidth, design procedures, and radiation patterns are presented for analysis and explanation of this antenna. The designed antenna operates over the frequency band between 3.1 GHz and 14 GHz (bandwidth of 127.5%), with three notched bands from 4.2 GHz to 6.2 GHz (38.5%), 6.6 GHz to 7.0 GHz (6%), and 12.2 GHz to 14 GHz (13.7%). The antenna is successfully simulated, fabricated, and measured. The results show that it has wide impedance bandwidth, multimodes characteristics, stable gain, and omnidirectional radiation patterns.

119 citations

References
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Journal ArticleDOI
TL;DR: In this paper, a small printed antenna with a reduced groundplane effect for ultrawideband (UWB) applications is described, where a notch is cut from the radiator while a strip is asymmetrically attached to the radiator.
Abstract: A small printed antenna is described with a reduced ground-plane effect for ultrawideband (UWB) applications. The radiator and ground plane of the antenna are etched onto a piece of printed circuit board (PCB) with an overall size of 25mmtimes25 mmtimes1.5 mm. A notch is cut from the radiator while a strip is asymmetrically attached to the radiator. The simulation and measurement show that the miniaturized antenna achieves a broad operating bandwidth of 2.9-11.6 GHz for a 10-dB return loss. In particular, the ground-plane effect on impedance performance is greatly reduced by cutting the notch from the radiator because the electric currents on the ground plane are significantly suppressed at the lower edge operating frequencies. The antenna features three-dimensional omni-directional radiation with high radiation efficiency of 79%-95% across the UWB bandwidth. In addition, a parametric study of the geometric and electric parameters of the proposed antenna will be able to provide antenna engineers with more design information

420 citations


"UWB Antenna With Single or Dual Ban..." refers background in this paper

  • ...Therefore, the ground plane effect can be reduced [21]....

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Journal ArticleDOI
TL;DR: In this article, the authors proposed a planar monopole antenna with dual band-notched characteristics, which is suitable for creating ultra-wideband antenna with narrow frequency notches or for creating multiband antennas.
Abstract: Wideband planar monopole antennas with dual band-notched characteristics are presented. The proposed antenna consists of a wideband planar monopole antenna and the multiple cup-, cap-, and inverted L-shaped slots, producing band-notched characteristics. In order to generate dual band-notched characteristic, we propose nine types of planar monopole antennas, which have two or three cap (cup or inverted L)-shaped slots in the radiator. This technique is suitable for creating ultra-wideband antenna with narrow frequency notches or for creating multiband antennas

308 citations

Journal ArticleDOI
TL;DR: In this article, the finite-difference time-domain (FDTD) method using Berenger's perfectly matched layer absorbing boundary condition (PML-ABC) is employed for simulation and the measurement is carried out in indoor environment.
Abstract: Backscattering of ultrawideband (UWB) antennas is theoretically and experimentally studied in this letter. The finite-difference time-domain (FDTD) method using Berenger's perfectly matched layer absorbing boundary condition (PML-ABC) is employed for simulation and the measurement is carried out in indoor environment. Monostatic radar cross section (RCS) of square-slot antenna and printed circular-disc monopole antenna (PCDMA) terminated with three different kinds of loads are numerically calculated and experimentally verified. They are in good agreement in the frequency range from 3 to 11 GHz. Afterwards, scattering characteristics of the structural and antenna modes of two kinds of UWB antenna structures are extensively characterized in both the frequency domain and time domain

105 citations


"UWB Antenna With Single or Dual Ban..." refers background in this paper

  • ...The most popular antenna designs with frequency band rejected function approaches are embedding slots (arc-slot [12], U-slot [13], square-slot [14], pi-slot [15]), attaching bar [16], the U-shaped bar [12], and slit from the radiator or ground plane [17]....

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Journal ArticleDOI
TL;DR: In this article, a simple arc-shaped slot in a circular-disk monopole antenna is used to obtain UWB operation with a notched frequency band for rejecting the 5.8-GHz WLAN band.
Abstract: By embedding a simple arc-shaped slot in a circular-disk monopole antenna, an ultra-wideband (UWB, 3.1–10.6 GHz) operation with a controlled notched frequency band can be obtained. The arc-shaped slot is placed close to the boundary of the circular-disk monopole and has a length of about one-half wavelength of the desired notched frequency. The proposed slotted circular-disk monopole antenna showing UWB operation with a notched frequency band for rejecting the 5.8-GHz WLAN band is demonstrated. The effects of the dimensions of the arc-shaped slot on the notched frequency band are also analyzed. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 188–191, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20766

101 citations

Journal ArticleDOI
TL;DR: In this paper, the characteristics of four planar dipoles are studied and compared based on the design considerations of ultrawide-band (UWB) antennas and their impedance matching, realized gain, and polarization over the UWB band are investigated.
Abstract: The characteristics of four planar dipoles are studied and compared based on the design considerations of ultrawide-band (UWB) antennas. Their impedance matching, realized gain, and polarization over the UWB band are investigated. The current distributions on the dipoles are illustrated to interpret their different radiation characteristics. Furthermore, pulses radiated in different directions are presented for both single-band and multiband schemes in UWB applications.

92 citations