Angebote zu "Antenna" (6 Treffer)

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Design a 1.3 GHz Microstrip Patch Antenna for a...
28,90 € *
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This book is concerned with the design, construction and testing of a 1.3GHz microstrip rectangular patch antenna. The patch antenna incorporated a feed-line on the PCB board. The first part of the design of the antenna involved the computation of the dimensions of the patch to achieve a fundamental frequency of 1.3GHz. The accuracy of the computed dimensions was confirmed on an Ansoft Designer simulation package by examining the return loss of the antenna at the resonant frequencies. The second part of the design of the antenna involved the computation of the performance of the antenna. A number of parameters were evaluated which included electric field, E and H planes, radiation pattern, radiation, conductance, directivity and efficiency. The use of approximate formulas, the MAPLE computer algebra package and the MATLAB package were used to evaluate the formulas for predicting the antenna parameters. Computations of the various performance parameters were confirmed on the Ansoft Designer simulator. The microstrip rectangular patch antenna was constructed in the laboratory and tested on a Network Analyzer. The responses showed good agreement with the Ansoft simulation results.

Anbieter: Dodax
Stand: 04.04.2020
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Design, Testing and Fabrication Of Ultra Wide B...
49,00 € *
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In this project, an ultra wide band antenna is designed with the help of a square shape. By the method of Fractal technique, the square is reduced in the terms of size, volume. The basic structure considered is a square. The iteration function which is to be applied on the generator which is basic structure is obtained by dividing a square into nine squares of equal size. Same small squares are removed and this gives rise to the first order. Process is then repeated for n number of times to get nth iteration. The directivity and gain is same for the fractal square antenna obtained at the second order. For the fractal second order antenna, the frequency attained is 3.1 to 10.6GHz which is simulated in CST Micro wave studio. The same antenna is fabricated and measured with Network Analyzer and the measured results and simulated results are matched. Here the ground technique used for the antenna is half-arc ground plane. We used half arc ground plane because there will be a soft transmission of current from port to feed so that maximum bandwith can be attained even after the reduction of dimension of the antenna.

Anbieter: Dodax
Stand: 04.04.2020
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Bandwidth Enhanced Antipodal Vivaldi Antenna fo...
49,90 € *
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In this work a novel antipodal Vivaldi antenna is designed to operate between L to KU band communication and applications. The proposed antenna modal consisting of a sepal type of tapered slot edge structure in the design The simulation of the antenna modal is carried on finite element based ANSYS HFSS electromagnetic tools a prototype of the proposed antenna is fabricated on FR4 substrate an experimentally studied the antenna parameters ZNB 20 vector network analyzer. The simulated and the measured results are having good argument each other and which gives the motivation for the applicability of the proposed antenna in the desired band communication and applications.

Anbieter: Dodax
Stand: 04.04.2020
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Doubler/Amplifier Building Block for CW-Radar
45,90 CHF *
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Inhaltsangabe:Abstract: For the measurement of velocity of, e.g., cars on the street or objects in industrial fabrication scenarios we use microwave radiation from so-called CW-Radar systems. The CW-Radar measures the Doppler-frequency of the microwave radiation: A wave of fixed frequency (Continuous Wave, CW) is radiated through a high-gain antenna onto a moving target where it is reflected and the reflected wave is received by the radar antenna again. The reflected wave exhibits a frequency shift (Doppler-frequency) which is proportional to the radial velocity of the target and proportional to the frequency of the transmitted wave. This wave has frequency 24GHz, generated in the transmitter and after that there are some of parts. The thesis task is to build one part of a radar system which operates at 24 GHz, namely the building block that takes-in the 12 GHz oscillator signal to double the frequency to 24 GHz and amplify it as a driver signal for the transmit amplifier. This circuit uses RT/Duroid 5870 substrate with 0.25 mm thickness. The measured resonance frequency occurs at 24 GHz. To reduce the effects and the losses in the high frequency, the spacing between the microstrip lines can be increased, where a thinner RT/Duroid 5870 substrate of 0.25 mm is correspondingly used. And most of the connectors are tested for 24GHz, and the best way to have high performance and low losses between changing from the coaxial cable to the microstrip, where there the most of the losses in the circuits for very high frequency. And there are a radiation in the space, can be considered also. Inhaltsverzeichnis:INTRODUCTION9 1Continuous-Wave (CW) Radar9 2Microwave elements and simulation tools13 2.1Microstrip13 2.2Analysis Electromagnetic Simulation Tools16 2.3Microstrip radial stub:19 2.4Interdigital Capacitors :21 2.5Test Equipment and Techniques:23 2.5.1Connectors:23 2.5.2Normal connectors(SMA):27 3Doubler Frequency : 29 3.1Balanced Doubler :29 3.2With Nonlinear effects:37 4Amplifier 24 GHz:41 4.1Amplifier Characterization:41 4.1.1Power Gain:41 4.1.2Stability:44 4.2Power Adjustment:47 5The Fabrication and Measurement50 5.1Doubler frequency:50 5.2The 24 GHz Amplifier55 5.3Measurement for all system58 6Conclusions53 Appendix A60 Appendix B63 Appendix C66 Appendix D70 Appendix E72 REFERENCE75 Textprobe:Text Sample: Chapter 2.5, Test Equipment and Techniques: An Agilent 8722 network analyzer was used for most of the published [...]

Anbieter: Orell Fuessli CH
Stand: 04.04.2020
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Doubler/Amplifier Building Block for CW-Radar
38,00 € *
ggf. zzgl. Versand

Inhaltsangabe:Abstract: For the measurement of velocity of, e.g., cars on the street or objects in industrial fabrication scenarios we use microwave radiation from so-called CW-Radar systems. The CW-Radar measures the Doppler-frequency of the microwave radiation: A wave of fixed frequency (Continuous Wave, CW) is radiated through a high-gain antenna onto a moving target where it is reflected and the reflected wave is received by the radar antenna again. The reflected wave exhibits a frequency shift (Doppler-frequency) which is proportional to the radial velocity of the target and proportional to the frequency of the transmitted wave. This wave has frequency 24GHz, generated in the transmitter and after that there are some of parts. The thesis task is to build one part of a radar system which operates at 24 GHz, namely the building block that takes-in the 12 GHz oscillator signal to double the frequency to 24 GHz and amplify it as a driver signal for the transmit amplifier. This circuit uses RT/Duroid 5870 substrate with 0.25 mm thickness. The measured resonance frequency occurs at 24 GHz. To reduce the effects and the losses in the high frequency, the spacing between the microstrip lines can be increased, where a thinner RT/Duroid 5870 substrate of 0.25 mm is correspondingly used. And most of the connectors are tested for 24GHz, and the best way to have high performance and low losses between changing from the coaxial cable to the microstrip, where there the most of the losses in the circuits for very high frequency. And there are a radiation in the space, can be considered also. Inhaltsverzeichnis:INTRODUCTION9 1Continuous-Wave (CW) Radar9 2Microwave elements and simulation tools13 2.1Microstrip13 2.2Analysis Electromagnetic Simulation Tools16 2.3Microstrip radial stub:19 2.4Interdigital Capacitors :21 2.5Test Equipment and Techniques:23 2.5.1Connectors:23 2.5.2Normal connectors(SMA):27 3Doubler Frequency : 29 3.1Balanced Doubler :29 3.2With Nonlinear effects:37 4Amplifier 24 GHz:41 4.1Amplifier Characterization:41 4.1.1Power Gain:41 4.1.2Stability:44 4.2Power Adjustment:47 5The Fabrication and Measurement50 5.1Doubler frequency:50 5.2The 24 GHz Amplifier55 5.3Measurement for all system58 6Conclusions53 Appendix A60 Appendix B63 Appendix C66 Appendix D70 Appendix E72 REFERENCE75 Textprobe:Text Sample: Chapter 2.5, Test Equipment and Techniques: An Agilent 8722 network analyzer was used for most of the published [...]

Anbieter: Thalia AT
Stand: 04.04.2020
Zum Angebot