Angebote zu "Fractal" (11 Treffer)

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Broadband Circularly Polarized Fractal Boundary...
39,90 € *
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Broadband Circularly Polarized Fractal Boundary Microstrip Antennas ab 39.9 EURO

Anbieter: ebook.de
Stand: 14.08.2020
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Quasi-Fractal Microstrip Filters with Extremely...
45,90 € *
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In this notebook, condensed microstrip filters based on dual-mode resonator have been designed as bandpass and bandstop filters. They use quasi fractal resonator as slotted patch EM elements. The presented quasi fractal BPF has been designed for ISM band wireless application with hugely narrow fractional bandwidth of less than 1 %. On the other hand, quasi fractal BSF has been designed for single or multi narrow rejection band frequency responses that can be employed in broadband wireless systems sensitive to fixed frequency interferences for applications of ISM and C band wireless systems. Both microstrip filters have interesting compactness and satisfactory simulated S11 and S21 responses that are well matched with the measurements.

Anbieter: Dodax
Stand: 14.08.2020
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On the Optimization of Multi Resonant compact P...
39,90 € *
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Nowadays, the cellular industry requires antenna systems capable of performing over many desired sub-bands within the frequency range extended from LTE up to Wi-Max frequencies. Many antennas have been implemented to cover the whole band from 700 MHz up to 6 GHz with good enough electrical characteristics, however, these antennas unfortunately cover some frequencies that are not in use and are out of interest. This comes in the expense of increasing the size of the designed antenna, which makes it inconvenient and impractical for the applications under consideration. The aim of this work is to design a single patch antenna system capable of resonating at the desired sub-bands with good enough directional characteristics (exceeding 3 dB within the frequency range) and with a size not exceeding (7 x 7 x 1) cm3. In comparison with other broadband antennas for the same purpose, the fractal slots would generate multiple resonances at the desired sub-bands without increasing the size of the patch. Manipulating the fractal dimensions, positions and shapes allows us to select the point of resonance as well as the efficiency of the antenna system.

Anbieter: Dodax
Stand: 14.08.2020
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Sidelobe reduction on conformal array using gen...
39,90 € *
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Fractal geometry has been applied to numerous designs of antenna arrays with the improvement in sidelobe reduction and broadband coverage. Moreover, the concept of fractal gives the self-similar characteristic and space-filling capability. Various fractal geometries have been observed such as Koch curves, Sierpinski curves, Peano curves, and so on which are widely employed in many applications. In this study, the objective is to analyze the fractal array behavior in sidelobe reduction when conformed to various surfaces. We use Genetic algorithm (GA) to determine the sidelobe level through the vast space of solution. GA is an optimization method based on the theory of natural selection which is suitable for a large number of parameters like excitation on each element of fractal arrays.

Anbieter: Dodax
Stand: 14.08.2020
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Antenna and EM Modeling with Matlab
327,00 CHF *
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An accessible and practical tool for effective antenna design Due to the rapid development of wireless communications, the modeling of radiation and scattering is becoming more important in the design of antennas. Consequently, it is increasingly important for antenna designers and students of antenna design to have a comprehensive simulation tool. Sergey Makarov's text utilizes the widely used Matlab(r) software, which offers a more flexible and affordable alternative to other antenna and electromagnetic modeling tools currently available. After providing the basic background in electromagnetic theory necessary to utilize the software, the author describes the benefits and many practical uses of the Matlab package. The text demonstrates how Matlab solves basic radiation/scattering antenna problems in structures that range from simple dipoles to patch antennas and patch antenna arrays. Specialized antenna types like fractal antennas and frequency selective surfaces are considered as well. Finally, the text introduces Matlab applications to more advanced problems such as broadband and loaded antennas, UWB pulse antennas, and microstrip antenna arrays. For students and professionals in the field of antenna design, Antenna and EM Modeling with Matlab: * Strikes an important balance between text and programming manual * Provides numerous examples on how to calculate important antenna/target parameters * Provides means for modifying existing codes for various individual projects * Includes a CD-ROM with Matlab codes and antenna geometry files

Anbieter: Orell Fuessli CH
Stand: 14.08.2020
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Quasi-Fractal Microstrip Filters with Extremely...
75,90 CHF *
ggf. zzgl. Versand

In this notebook, condensed microstrip filters based on dual-mode resonator have been designed as bandpass and bandstop filters. They use quasi fractal resonator as slotted patch EM elements. The presented quasi fractal BPF has been designed for ISM band wireless application with hugely narrow fractional bandwidth of less than 1 %. On the other hand, quasi fractal BSF has been designed for single or multi narrow rejection band frequency responses that can be employed in broadband wireless systems sensitive to fixed frequency interferences for applications of ISM and C band wireless systems. Both microstrip filters have interesting compactness and satisfactory simulated S11 and S21 responses that are well matched with the measurements.

Anbieter: Orell Fuessli CH
Stand: 14.08.2020
Zum Angebot
Sidelobe reduction on conformal array using gen...
61,90 CHF *
ggf. zzgl. Versand

Fractal geometry has been applied to numerous designs of antenna arrays with the improvement in sidelobe reduction and broadband coverage. Moreover, the concept of fractal gives the self-similar characteristic and space-filling capability. Various fractal geometries have been observed such as Koch curves, Sierpinski curves, Peano curves, and so on which are widely employed in many applications. In this study, the objective is to analyze the fractal array behavior in sidelobe reduction when conformed to various surfaces. We use Genetic algorithm (GA) to determine the sidelobe level through the vast space of solution. GA is an optimization method based on the theory of natural selection which is suitable for a large number of parameters like excitation on each element of fractal arrays.

Anbieter: Orell Fuessli CH
Stand: 14.08.2020
Zum Angebot
Antenna and EM Modeling with Matlab
199,99 € *
ggf. zzgl. Versand

An accessible and practical tool for effective antenna design Due to the rapid development of wireless communications, the modeling of radiation and scattering is becoming more important in the design of antennas. Consequently, it is increasingly important for antenna designers and students of antenna design to have a comprehensive simulation tool. Sergey Makarov's text utilizes the widely used Matlab(r) software, which offers a more flexible and affordable alternative to other antenna and electromagnetic modeling tools currently available. After providing the basic background in electromagnetic theory necessary to utilize the software, the author describes the benefits and many practical uses of the Matlab package. The text demonstrates how Matlab solves basic radiation/scattering antenna problems in structures that range from simple dipoles to patch antennas and patch antenna arrays. Specialized antenna types like fractal antennas and frequency selective surfaces are considered as well. Finally, the text introduces Matlab applications to more advanced problems such as broadband and loaded antennas, UWB pulse antennas, and microstrip antenna arrays. For students and professionals in the field of antenna design, Antenna and EM Modeling with Matlab: * Strikes an important balance between text and programming manual * Provides numerous examples on how to calculate important antenna/target parameters * Provides means for modifying existing codes for various individual projects * Includes a CD-ROM with Matlab codes and antenna geometry files

Anbieter: Thalia AT
Stand: 14.08.2020
Zum Angebot
Sidelobe reduction on conformal array using gen...
35,99 € *
ggf. zzgl. Versand

Fractal geometry has been applied to numerous designs of antenna arrays with the improvement in sidelobe reduction and broadband coverage. Moreover, the concept of fractal gives the self-similar characteristic and space-filling capability. Various fractal geometries have been observed such as Koch curves, Sierpinski curves, Peano curves, and so on which are widely employed in many applications. In this study, the objective is to analyze the fractal array behavior in sidelobe reduction when conformed to various surfaces. We use Genetic algorithm (GA) to determine the sidelobe level through the vast space of solution. GA is an optimization method based on the theory of natural selection which is suitable for a large number of parameters like excitation on each element of fractal arrays.

Anbieter: Thalia AT
Stand: 14.08.2020
Zum Angebot