Design and Analysis of a CPW-Fed Broadband Conical Conformal Antenna

2012 ◽  
Vol 229-231 ◽  
pp. 1622-1625 ◽  
Author(s):  
Zhi Hui Hu ◽  
Yong Hua Jiang ◽  
Xiang Ling
Keyword(s):  
Simple Structure ◽  
Simulation Software ◽  
Electromagnetic Simulation ◽  
Planar Antenna ◽  
Broad Bandwidth ◽  
Conformal Antenna ◽  
Radar Applications ◽  
Influencing Parameters ◽  
The Difference ◽  
Wideband Radar

A CPW-fed microstrip monopole antenna which is conformal to a conical surface is presented in this paper. It has a simple structure printed on a substrate with dielectric constant of 2.55 and thickness of 0.2mm. By the aid of electromagnetic simulation software of CST Microwave Studio, the main influencing parameters of the antenna are simulated and analyzed, the difference between planar antenna and conical conformal antenna has been discussed, and the optimized physical model has been achieved. The simulated result shows the proposed CPW-fed conical conformal antenna has a broad bandwidth property that covers from 6.2 to 20GHz(VSWR 2), and it is suitable for wideband radar applications.

scholarly journals Impact of Modeling Simplifications on Lightning Strike Simulation for Aeroengine

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Yi-fan Qian ◽  
Zhi-feng Ye ◽  
Hai-bo Zhang
Keyword(s):  
Simulation Analysis ◽  
Simulation Software ◽  
Simplified Model ◽  
Lightning Strike ◽  
Electromagnetic Simulation ◽  
Experimental Conditions ◽  
Turbofan Engine ◽  
Engine Model ◽  
Simulation Results ◽  
The Difference

With the development of electromagnetic simulation software and affordable hardware, it is allowed for us to complete simulations for EMC purposes. However, simulation demands will be immense when simulations for models with complex structures, especially aircraft components, have to be solved. Hence, it is meaningful to investigate how to minimize the computational demands. One of the solutions to reduce the simulation expense is the simplification for the simulated model. But the simplified model should be guaranteed to provide credible simulation results which do not deviate from the original model apparently. Generally, the difference between the simulation results and experimental data is estimated, or if the experimental conditions are not achieved, the comparison between the simplified model and the original one has to be analyzed, at least. This paper explores the electromagnetic simulation of a turbofan engine encountering lightning strike. With the simplifications of different components on the turbofan engine, the influences on induced currents of engine controller cables are simulated and analyzed based on the transmission-line matrix method. A combining method of components removal and geometric structure simplification is proposed to simplify the whole engine model. Simplified components include compressor, combustion chamber, turbine, and nozzle. The effects of different simplification methods are quantified, and the rationality of the simplified model is verified by simulation analysis.

scholarly journals Design of Planar and Conformal Microstrip Patch Antenna for Avionics Applications

2019 ◽  
Vol 8 (10) ◽  
pp. 4363-4365
Keyword(s):  
Method Of Moments ◽  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Simulation Software ◽  
Planar Antenna ◽  
Patch Antennas ◽  
Conformal Antenna ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Antenna Configuration

Microstrip patch antennas have an important role on Communication applications on satellites, aircrafts, missiles and other vehicles comparing to other types of antenna because of their conformability nature. In this paper several EM simulations performed on planar and conformal antenna for avionic applications. The design of the proposed planar antenna configuration is analyzed by using IE3D simulation software, it is MOM (Method of Moments) based and conformal antenna is analyzed by using HFSS simulator which is finite element method.In addition we are achieving circular polarization.

Design of Ka-Band Inset-Fed Conical Conformal Patch Antenna

2013 ◽  
Vol 336-338 ◽  
pp. 1699-1702
Author(s):  
Zhi Hui Hu ◽  
Yong Hua Jiang ◽  
Xiang Ling
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Microstrip Patch Antenna ◽  
Planar Antenna ◽  
Ka Band ◽  
Conformal Antenna ◽  
Microstrip Patch ◽  
The Difference ◽  
Effect Of Surface

Conical conformal microstrip patch antenna is very important in wireless communication and microwave instrument. In this paper, a Ka-band rectangular inset-fed microstrip patch antenna which conforms to a conical surface has been designed, the specific designed method and parameters were given. Then a conical conformal microstrip antenna is simulated by CST, the difference between planar antenna and conical conformal antenna has been discussed, and the effect of surface curvature on conical conformal antenna resonant frequency of has been analyzed.

scholarly journals Performance and style in the work of Olgyay and Olgyay

2014 ◽  
Vol 18 (2) ◽  
pp. 167-176 ◽  
Author(s):  
David Leatherbarrow ◽  
Richard Wesley
Keyword(s):  
Graphical Representation ◽  
Building Design ◽  
The United States ◽  
Energy Performance ◽  
Control Device ◽  
Simulation Software ◽  
Open Architecture ◽  
Form Generation ◽  
The Difference ◽  
Building Energy Analysis

The sun control device has to be on the outside of the building, an element of the facade, an element of architecture. And because this device is so important a part of our open architecture, it may develop into as characteristic a form as the Doric column.Victor Olgyay (1910–1970), a Hungarian architect who came to the United States in 1947 with his twin brother and collaborator, Aladár (1910–1963), is best known today as the author of Design with Climate: Bioclimatic Approach to Architectural Regionalism (1963), an important book often referenced in the environmental building design field [1]. As leaders in research in bioclimatic architecture from the early 1950s to the late 1960s, the Olgyay brothers could be considered the ‘fathers’ of contemporary environmental building design. Their research and publications laid the foundation for much of the building simulation software in use today. Other than the difference between working on graph paper and using computer-generated graphics, there is little difference between Autodesk's Ecotect Analysis (simulation and building energy analysis software) and the Olgyays' techniques for the analysis of environmental factors and graphical representation of climate. The manner in which the Olgyays established connections between building design and the science of climate laid the foundation for the development of environmental simulation, one of contemporary architecture's leading methods of form generation. Victor Olgyay's teaching, however, represents another kind of thinking, a broader concern for architecture, beyond energy performance. ‘The primary task of architecture,’ Olgyay announced to his students, ‘is to act in man's favour; to interpose itself between man and his natural surroundings in order to remove the environmental load from his shoulders.

scholarly journals A CUDA-based GPU engine for gprMax: Open source FDTD electromagnetic simulation software

2019 ◽  
Vol 237 ◽  
pp. 208-218 ◽  
Author(s):  
Craig Warren ◽  
Antonios Giannopoulos ◽  
Alan Gray ◽  
Iraklis Giannakis ◽  
Alan Patterson ◽  
...  
Keyword(s):  
Open Source ◽  
Simulation Software ◽  
Electromagnetic Simulation

scholarly journals Design of Two Novel Dual Band-Notched UWB Antennas

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Bing Li ◽  
Jing-song Hong
Keyword(s):  
Time Domain ◽  
Simple Structure ◽  
The Other ◽  
Ultra Wideband ◽  
Dual Band ◽  
Uwb Antennas ◽  
Monopole Antennas ◽  
Printed Monopole ◽  
The Difference ◽  
The Time Domain

Two novel dual band-notched ultra-wideband (UWB) printed monopole antennas with simple structure and small size are presented. The size of both antennas is25×25×0.8 mm3. The bandwidth of one of the proposed antenna can be from 2.7 GHz to 36.8 GHz, except the bandwidth of 3.2–3.9 GHz for WiMAX applications and 5.14–5.94 GHz for WLAN applications. The bandwidth of the other is ranging for 2.7 to 41.1 GHz, except the bandwidth of 3.2–3.9 GHz for WiMAX applications and 4.8–5.9 GHz for WLAN applications. Bandwidths of the antennas are about 512% and 455% wider than those of conventional band-notched UWB antennas, respectively. In addition, the time-domain characteristics of the two antennas are investigated to show the difference between both antennas.

scholarly journals Explainable Post-Occupancy Evaluation Using a Humanoid Robot

2020 ◽  
Vol 10 (21) ◽  
pp. 7906
Author(s):  
Marina Bonomolo ◽  
Patrizia Ribino ◽  
Gianpaolo Vitale
Keyword(s):  
Humanoid Robot ◽  
Evaluation Method ◽  
Methodological Approach ◽  
False Negative ◽  
Simulation Software ◽  
Technical Standards ◽  
True Negative ◽  
Post Occupancy Evaluation ◽  
The Difference ◽  
Environmental Measures

The paper proposes a new methodological approach for evaluating the comfort condition using the concept of explainable post occupancy to make the user aware of the environmental state in which (s)he works. Such an approach was implemented on a humanoid robot with social capabilities that aims to enforce human engagement to follow recommendations. The humanoid robot helps the user to position the sensors correctly to acquire environmental measures corresponding to the temperature, humidity, noise level, and illuminance. The distribution of the last parameter due to its high variability is also retrieved by the simulation software Dialux. Using the post occupancy evaluation method, the robot also proposes a questionnaire to the user for collecting his/her preferences and sensations. In the end, the robot explains to the user the difference between the suggested values by the technical standards and the real measures comparing the results with his/her preferences and perceptions. Finally, it provides a new classification into four clusters: true positive, true negative, false positive, and false negative. This study shows that the user is able to improve her/his condition based on the explanation given by the robot.

scholarly journals Low Elevation Angle Estimation with Range Super-Resolution in Wideband Radar

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3104 ◽  
Author(s):  
Sha Huan ◽  
Man Zhang ◽  
Gane Dai ◽  
Huaguo Gan
Keyword(s):  
Grazing Angle ◽  
Elevation Angle ◽  
Super Resolution ◽  
Robust Estimator ◽  
Frequency Diversity ◽  
Angle Estimation ◽  
Structure Relationship ◽  
Radar Waveforms ◽  
Radar Applications ◽  
Wideband Radar

Height detection of a low elevation angle target is crucial in radar applications. Due to the presence of the multiple path reflections, elevation angle estimation is difficult with conventional narrowband radar waveforms. The reflection ground area parameters are especially hard to obtain for modeling. In this paper, we proposed a wideband, low elevation angle estimator based on range super-resolution, achieving a high robustness to variations in reflection coefficients. A relaxation (RELAX) algorithm was applied as the range super-resolution algorithm to separate the direct target echo and the reflected signal thanks to the relatively abundant frequency diversity. The grazing angle was obtained by synthesizing the steering vector of the direct signal and the range structure relationship between the two signal components. Theoretical analysis and simulation results confirmed the improved behavior of the proposed robust estimator in contrast to other conventional algorithms.

scholarly journals Three-dimensional electromagnetic simulation of monolithic radial transmission lines for Z-pinch

2014 ◽  
Vol 32 (4) ◽  
pp. 599-603 ◽  
Author(s):  
Chongyang Mao ◽  
Xiaobing Zou ◽  
Xinxin Wang
Keyword(s):  
Transmission Lines ◽  
Power Efficiency ◽  
Circuit Simulation ◽  
Three Dimensional ◽  
Electromagnetic Simulation ◽  
Transmitted Power ◽  
Hyperbolic Line ◽  
Tem Mode ◽  
The Difference ◽  
Z Pinch

AbstractThe electromagnetic simulation of the monolithic radial transmission lines for future Z-pinch was performed. Focusing on the difference in the maximum transmitted power efficiency between the electromagnetic simulation and the circuit simulation, the monolithic radial transmission lines with different impedance profile (exponential, Gaussian, hyperbolic) were compared. The power efficiency for the exponential line is higher than that for the Gaussian lines and the hyperbolic line, which is similar to that from the circuit simulation. However, all the power efficiencies obtained with the electromagnetic simulation are about 15% lower than those obtained with the circuit simulation, indicating the existence of considerable non-TEM modes and a non-ignorable error in the circuit simulation based on the quasi-TEM mode approximation. In consideration of several monolithic radial transmission lines being stacked together and the flat electrodes required by the stacked lines, the hyperbolic line was compared with the exponential line with several wide radial slots cut on the flat electrodes. While the hyperbolic line has a little bit lower transmitted power efficiency than that of the exponential line, it is much easier in fabrication. For this reason, the hyperbolic line was recommended as the best choice.

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