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A microstrip leaf-shaped printed monopole antenna bioinspired on the Inga marginata leaves is presented in this paper for UWB applications. A parametric study of the proposed antenna bioinspired geometry was conducted in order to verify their resonant properties. Numerical and experimental results were obtained. The results show an impedance bandwidth superior to Wireless communication systems have become increasingly popular due to the diversity of services offered, requiring portable communication devices that operate in multiple frequency bands. To meet the requirements of different systems, the use of embedded antennas with small size, ease of integration, desired gain pattern, large bandwidth, among other features that come with the device miniaturization and low-cost manufacture.

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A microstrip leaf-shaped printed monopole antenna bioinspired on the Inga marginata leaves is presented in this paper for UWB applications. A parametric study of the proposed antenna bioinspired geometry was conducted in order to verify their resonant properties. Numerical and experimental results were obtained. The results show an impedance bandwidth superior to Wireless communication systems have become increasingly popular due to the diversity of services offered, requiring portable communication devices that operate in multiple frequency bands.

To meet the requirements of different systems, the use of embedded antennas with small size, ease of integration, desired gain pattern, large bandwidth, among other features that come with the device miniaturization and low-cost manufacture. Therefore, it appears that the microstrip antennas are promising candidates to address these specific requirements, as well as to operate at different frequency bands.

The study of microstrip antennas with models bioinspired on leaves leaf-shaped antennas has aroused the interest of researchers due to the good results. The leaf serves as a model because of its characteristics which are similar to the antennas with respect to the reception of electromagnetic waves, as the leaves act in the capture of sunlight for conversion into chemical energy.

Among the research on antennas bioinspired on leaves, some works can be cited with operation in the UWB range ultra-wideband , such as Neyestanak [ 1 ], consisting of the model of a flower of four petals built in microstrip showing good results for return loss in the 4. In recent research, an antenna bioinspired on sugarcane leaf for being used in fourth-generation mobile communication systems 4G LTE [ 3 ] was designed. UWB antennas are used in military, commercial, medical, radar and mobile communications applications [ 4 ].

Among other applications, you can use them with the function of replacing the telecommunications cables between electronic devices over short distances around 10 meters , preferably indoors as offices and homes [ 5 ]. The UWB systems assume greater noise immunity, low-cost equipment, low-power operation, among other advantages. Due to these characteristics, this technology stands out among the wireless communications systems alternatives for short distances, especially on the fourth generation 4G of mobile communications [ 7 ].

This paper presents a parametric study of the monopole antenna printed on microstrip which is bioinspired on the Inga marginata leaf for applications in UWB systems. The printed monopole antennas PMA have as main features the compact size and a wide bandwidth, with different applications.

In Fig. The technique presented in [ 9 ] is used for a better impedance matching. This technique proposes a rectangular opening slit in the ground plan with L S and W S dimensions. The distribution of the electric current density in this antenna is concentrated mainly on the edges of the radiating patch. Thus, by increasing the perimeter p , there is a consequent increase on the wavelength, which, as a result, decreases the lowest resonance frequency [ 10 ].

The bioinspired motivation from which was developed the antenna design came from the observation of the arrangement of the leaves of a tropical plant, scientifically named Inga marginata Willd [ 11 ], see Fig. Taking the PMA dimensions shown in Fig. An image of built leaf-shaped PMA prototype is shown in Fig. In particular, W s and L s dimensions were set for impedance matching purposes while the dimensions R 1, R 2 and R 3 were adjusted for tuning the antenna operating frequency band.

To obtain a better impedance matching in the UWB band, ground plane slit dimensions W s , L s have been simulated in the ranges: 0. From this parametric study, it was found that 1. With the increase of R 1 the perimeter of the radiating patch antenna also increases and therefore the first resonance frequency of the operating range is reduced. This behavior can be observed in Fig. For other simulated values of R 1 , a good impedance matching over the entire range and excellent bandwidth were obtained.

For values less than 6. The results are satisfactory for all the other R 2 values. There was little change in the resonant behavior of the antenna with the increase of R 3.

The bandwidth set for a return loss less than dB presents a 2. In all measured range, the VSWR presents values below 2, indicating that the antenna has minimal reflections and the signal injected in it can be transmitted, what is a necessary condition for operations in UWB applications.

These results are shown in Table 2. A bandwidth greater than the bandwidth considered UWB, which is 7. It can be seen by Fig. This is due to the truncated ground plane, thus allowing the possibility of being applied to various portable communication devices. Higher current densities are notice on microstrip feedline, ground plane slitted-edge and leaf-shaped edges.

A parametric study and experimental verification of proposed microstrip leaf-shaped PMA bioinspired on Inga marginata leaf was presented in this paper for UWB applications.

The resonant behavior of the proposed antenna with variation of its main dimensions was analyzed. The experimental results indicate a bandwidth higher than Simulated radiation patterns, impedance on Smith chart and distribution of current density for the proposed PMA were presented and analyzed.

Simulated and measured results for return loss and VSWR are in consonance. Thus, considering the simplicity, compact structure, low cost and the consistent results, the proposed Inga marginata leaf-shaped printed monopole antenna appears to be quite efficient and with potential for UWB applications.

Haraz and A. INTEC , pp. Ghavami, R. Michael and L. Ri de Janeiro: LTC, Londrina, Chen and M. Chichester: Wiley, Bao, M. Microwave Opt. Ahmed, A. Acesso em: 12 Jan. Pickering, G. This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Services on Demand Journal. Abstract A microstrip leaf-shaped printed monopole antenna bioinspired on the Inga marginata leaves is presented in this paper for UWB applications. Introduction Wireless communication systems have become increasingly popular due to the diversity of services offered, requiring portable communication devices that operate in multiple frequency bands. Printed Monopole Antenna The printed monopole antennas PMA have as main features the compact size and a wide bandwidth, with different applications.

UWB Antenna Bioinspired on the Inga marginata leaf The bioinspired motivation from which was developed the antenna design came from the observation of the arrangement of the leaves of a tropical plant, scientifically named Inga marginata Willd [ 11 ], see Fig. Conclusions A parametric study and experimental verification of proposed microstrip leaf-shaped PMA bioinspired on Inga marginata leaf was presented in this paper for UWB applications.

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You are currently using the site but have requested a page in the site. Would you like to change to the site? Constantine A. Updated with color and gray scale illustrations, a companion website housing supplementary material, and new sections covering recent developments in antenna analysis and design This book introduces the fundamental principles of antenna theory and explains how to apply them to the analysis, design, and measurements of antennas. Due to the variety of methods of analysis and design, and the different antenna structures available, the applications covered in this book are made to some of the most basic and practical antenna configurations.

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Estimated delivery business days. Format Hardcover. Condition Brand New. Description Updated with color and gray scale illustrations, a companion website housing supplementary material, and new sections covering recent developments in antenna analysis and design This book introduces the fundamental principles of antenna theory and explains how to apply them to the analysis, design, and measurements of antennas.

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