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Proceedings ArticleDOI

A comparative study of different notches for WLAN rejection in a planar UWB antenna

28 Sep 2015-pp 82-85
TL;DR: In this paper, a planar ultra-wideband antenna (UWB) is analyzed and different methods for creating notches are adopted for efficient WLAN frequency rejection.
Abstract: In this paper, a planar ultra- wideband antenna (UWB) is analyzed and different methods for creating notches are adopted for efficient WLAN frequency rejection. The antenna is mounted on a dielectric substrate having a value of 3.38. The antenna has a bandwidth of 7.22 GHz and a gain of 1.13 dB. Three different novel approaches for creating notches are presented followed by their comparative study. Efficient stop-bands can be obtained in the frequency range of 5–6 GHz thereby rejecting WLAN frequency. The antenna exhibits stable radiation patterns. All the analysis is done in HFSS 2013.
Citations
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Proceedings ArticleDOI
01 Jun 2018
TL;DR: A study of different models with fractal geometry implemented in Ultra Wide-Band (UWB) antennas design improves bandwidth, efficiency, and radiation properties, generating options that will serve as a starting point for the development and design of antennas in the future.
Abstract: In this article we present a study of different models with fractal geometry implemented in Ultra Wide-Band (UWB) antennas design. With different methods and geometric variants applied to this type of antennas, frequency ranges between 1-20GHz are obtained, generating an efficiency greater than 90% in its operating band, considering the variation of different parameters such as iterations, shape, slots, among other things; Bandwidths greater than 15GHz have been achieved, this has generated a wide range of applications for fractal antennas. An analysis was carried out based on the similarity of the models, the operating ranges, and the constructive characteristics, with the aim of improving bandwidth, efficiency, and radiation properties, generating options that will serve as a starting point for the development and design of antennas in the future.

5 citations


Cites background from "A comparative study of different no..."

  • ...In [46, 47], what is analyzed is presented, in this case each branch exhibits an angle of 180o and in [46, 48], the authors present an angle of 120o....

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References
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Journal ArticleDOI
TL;DR: In this article, a planar monopole antenna with a staircase shape and small volume (25times26times1 mm3) was proposed for ultrawideband (UWB) systems.
Abstract: A planar monopole antenna with a staircase shape and small volume (25times26times1 mm3) is proposed in this paper. With the use of a half-bowtie radiating element, the staircase-shape, and a modified ground plane structure, the proposed antenna has a very wide impedance bandwidth measured at about 11.6 GHz (2.9-14.5 GHz, bandwidth ratio about 1:5) below VSWR 2 including the WLAN band notched in the vicinity of 5 GHz. An omnidirectional radiation pattern is obtained. The group delay which is an indication of linearity between two proposed antennas is less than 1 ns. The electrical characteristics in terms of frequency and time domains and physical ones of the proposed antenna make it attractive for use in ultrawideband (UWB) systems

433 citations

Journal ArticleDOI
TL;DR: In this paper, a simple and compact ultrawideband (UWB) aperture antenna with extended band-notched designs is presented, which consists of a rectangular aperture on a printed circuit board ground plane and a T-shaped exciting stub.
Abstract: A simple and compact ultrawideband (UWB) aperture antenna with extended band-notched designs is presented. The antenna consists of a rectangular aperture on a printed circuit board ground plane and a T-shaped exciting stub. The proposed planar coplanar waveguide fed antenna is easy to be integrated with radio-frequency/microwave circuitry for low manufacturing cost. The antenna is successfully designed, implemented, and measured. A compact aperture area of 13 times23mm2 is obtained with promising performances, including broadband matched impedance, stable radiation patterns, and constant group delay. The correlation between the mode-based field distributions and radiation patterns is discussed. Extended from the proposed antenna, three advanced band-notched (5-6 GHz) designs are also presented as a desirable feature for UWB applications

351 citations

Journal ArticleDOI
TL;DR: In this article, a planar ultrawideband (UWB) antenna with dual notched bands is proposed and investigated, where a T-shaped stub embedded in the square slot of the radiation patch and a pair of U-shaped parasitic strips beside the feed line is used.
Abstract: A novel planar ultrawideband (UWB) antenna with dual notched bands is proposed and investigated. The antenna consists of a square patch and a modified grounded plane. To realize dual notched bands characteristics, a T-shaped stub embedded in the square slot of the radiation patch and a pair of U-shaped parasitic strips beside the feed line is used. The advantage of this antenna is the high rejection level in the stopband. The measured results show that the proposed dual-notched-bands planar antenna shows a very wide bandwidth from 2.8 to 11.0 GHz defined by voltage standing wave ratio VSWR <; 2, with two notched bands of 3.3-4.0 GHz (WiMAX band) and 5.05-5.90 GHz (WLAN band), respectively. Both the experimental and simulated results of the proposed antenna are presented, indicating that the antenna is a good candidate for various UWB applications.

170 citations


"A comparative study of different no..." refers background in this paper

  • ...Keywords—UWB technology, notch, return loss, gain I. INTRODUCTION (HEADING 1) Ultra-wideband refers to a system or a signal that has a significantly large absolute or relative bandwidth [1]....

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Journal ArticleDOI
TL;DR: In this paper, a microstrip-fed printed dual band antenna for Bluetooth (2.4{2.484GHz) and UWB (3.1{ 10.6GHz) applications with WLAN (5.15{5.825GHz) band-notched characteristics is proposed.
Abstract: In this article, a compact microstrip-fed printed dual band antenna for Bluetooth (2.4{2.484GHz) and UWB (3.1{ 10.6GHz) applications with WLAN (5.15{5.825GHz) band-notched characteristics is proposed. It is demonstrated that dual band characteristics with desired bandwidth can be obtained by using a fork shaped radiating patch, whereas, band-notched characteristics can be obtained by etching two L-shaped slots and two symmetrical step slots on the rectangular ground plane. The proposed antenna is simulated, fabricated and tested. The structure is fabricated on a low cost FR4 substrate having dimensions of 50mm (Lsub) £ 24mm (Wsub) £ 1:6 (H)mm and fed by a 50› microstrip line. The proposed antenna has S11 • i10dB over 2.18{2.59GHz, Bluetooth band, 3.098{5.15GHz and 5.948{11.434GHz, UWB band with WLAN band notch. The structure exhibits nearly omnidirectional radiation patterns, stable gain, and small group delay variation over the desired bands.

49 citations

Proceedings ArticleDOI
16 Oct 2014
TL;DR: This paper presents the simulation analysis of small planar antennas using different antenna miniaturization techniques to defineminiaturization methods by which the authors can estimate the use of micro strip antennas.
Abstract: In wireless communication, antenna miniaturization is a vital issue these days. This paper presents the simulation analysis of small planar antennas using different antenna miniaturization techniques. They have brought to define miniaturization methods by which we can estimate the use of micro strip antennas. Various govt. and private sector organizations made use of these techniques to solve the problem of antenna fabrication in mobiles, satellites, missiles, radar navigational aids and military applications. These techniques are used to reduce the physical size but to increase the bandwidth and efficiency of antenna. Some approaches for antenna miniaturization are introduction of slots, slits, short meandering and novel geometries like fractals or by using higher dielectrics constant. The effect of miniaturization in various antenna parameters like, radiation efficiency, gain and bandwidth are discussed. Finally the paper reports a brief description of miniaturization of antenna by using suitable and efficient methods that includes use of double layered substrate structure in microstrip patch antenna.

36 citations