scholarly journals A Novel “回” Pattern Branch Antenna for 3G\4G\WLAN\Bluetooth\Navigation Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Tangyao Xie ◽  
Jianguo Yu ◽  
Yao Li ◽  
Zhen Yu ◽  
Ziheng Lin
Keyword(s):  
Mobile Communication ◽  
Simulation Software ◽  
Electromagnetic Simulation ◽  
Network Coverage ◽  
Multiple Frequency ◽  
Radiation Characteristics ◽  
Feeding Mode ◽  
Pattern Structure ◽  
Classical Pattern ◽  
Test Result

This study proposes and designs a multiband branch antenna with a structure that imitates the Chinese classical pattern structure. The antenna radiator’s structure is a symmetrical rectangular stub fused with a Chinese classical pattern structure, and the rectangular stub is bent so that the outer and inner stubs are coupled to each other to generate multiple frequency bands. Microstrip line feeding is the feeding mode, and the grounding plate is a trapezoidal structure formed by subtracting two triangles from a rectangle. The overall size of the antenna is 60 × 60 × 1.6 mm3, and the dielectric board adopts FR4. The substrate dielectric constant εr = 4.4, the thickness h = 1.6 mm, and the dielectric loss tangent tanδ = 0.02. For antenna modeling and parameter optimization, HFSS electromagnetic simulation software is used. The antenna can cover 1.49 to 1.60 GHz, 1.87 to 2.51 GHz, and 4.63 to 5.34 GHz and generate three main frequencies: 1.57, 2.15, and 5.06 GHz, according to test result. The antenna has omnidirectional radiation characteristics and can be widely used in future mobile communication network coverage.

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 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.

A Design of Printed Inverted-F Antenna for RFID Tag at 5.8 GHz

2013 ◽  
Vol 427-429 ◽  
pp. 1293-1296
Author(s):  
Yan Zhong Yu ◽  
Ji Zhen Ni ◽  
Xian Hui Li
Keyword(s):  
High Frequency ◽  
Printed Circuit Board ◽  
Ground Plane ◽  
Simulation Software ◽  
Circuit Board ◽  
Electromagnetic Simulation ◽  
Antenna Structure ◽  
Rfid Tag ◽  
Printed Circuit ◽  
Substrate Layer

A printed inverted-F antenna for RFID tag at 5.8 GHz is designed in this paper. The antenna structure consists of an inverted-F patch, a substrate layer, and a ground plane. To reduce costs, the FR4 is selected as the material of substrate layer, which is used commonly in PCB (Printed Circuit Board). Its relative permittivity is 4.4 and a loss tangent is 0.02. The inverted-F patch and ground plane are laid on/under the substrate layer respectively. The designed antenna is modeled, simulated and optimized by using HFSS (high frequency electromagnetic simulation software). Simulation results demonstrate that the printed inverted-F antenna can satisfy the requirements of RFID Tag applications.

Simulation and Analysis for New Contact System of Control and Protective Switching Based on Ansoft Maxwell

2012 ◽  
Vol 229-231 ◽  
pp. 1963-1966
Author(s):  
Zhi Yuan Cai ◽  
Zhan Nan Guo
Keyword(s):  
Low Voltage ◽  
Simulation Software ◽  
Contact System ◽  
Field Analysis ◽  
Practical Significance ◽  
Electromagnetic Simulation ◽  
Circuit Breakers ◽  
Magnetic Field Analysis ◽  
Overall Performance ◽  
Breaking Time

CPS (control and protective switching) one of the smart integrated include the function of circuit breakers, contactors, and low-voltage electrical appliances. The contact system is different from the traditional low-voltage electrical function. Well-designed structure of the contact system has important practical significance for overall performance of CPS. The paper proposes a new contact system. The simulation analyze the electrical repulsion of the traditional contact system and a new contact system under different current size, breaking time, blowing arc magnetic field analysis by electromagnetic simulation software. According to the results of the simulation comparison, prove that the new contactor structure making the function of CPS increased.

Simulation on Probe-Fed Rectangular Patch Antenna with the Minkowski Fractal Structure

2014 ◽  
Vol 971-973 ◽  
pp. 1148-1151
Author(s):  
Ruo Yan Han ◽  
Wei He ◽  
Ping Lu ◽  
He Ling Cai ◽  
Jiao Hong
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
High Frequency ◽  
Fractal Structure ◽  
Simulation Software ◽  
Electromagnetic Simulation ◽  
Rectangular Patch ◽  
Simulation Results ◽  
Application Requirements ◽  
Minkowski Fractal

The probe-fed rectangular patch antenna with the Minkowski fractal structure which for 2.45GHz was simulated by using high frequency electromagnetic simulation software HFSS V11.The Simulation results showed that it was similar to side-fed square patch antenna with the Minkowski fractal structure. The resonant frequency decreased with fractal iteration, and the size of the antenna could be miniaturized. And antenna pattern unchanged with fractal iteration mostly, which meet the application requirements basically.

Design and Simulation of K Band RF MEMS Tunable Combline Filter

2014 ◽  
Vol 875-877 ◽  
pp. 2219-2223 ◽  
Author(s):  
Zhong Liang Deng ◽  
Xing Jie Cao
Keyword(s):  
Mobile Communication ◽  
Communication Systems ◽  
Bandpass Filter ◽  
Rf Mems ◽  
Bandpass Filters ◽  
Simulation Software ◽  
Frequency Range ◽  
Mobile Communication Systems ◽  
Simulation Results ◽  
Tunable Frequency

Tunable bandpass filters are generally preferred and are used extensively in the mobile communication systems. In this paper, a design of the RF MEMS tunable combline bandpass filter is proposed. Firstly, the theory of the RF MEMS tunable combline bandpass filter is presented. Secondly, a combline bandpass filter which have a tunable frequency range from 18GHz to 27GHz is designed and simulated by using the EDA simulation software. Its bandwidth is about 1GHz in the tunable frequency range. From the simulation results, the designed filter is not only compact and effortless to fabricate but also relatively superior in some aspects.

Study of the Search and Rescue Robot’s Motion System in the Underground Environment

2012 ◽  
Vol 588-589 ◽  
pp. 1480-1483
Author(s):  
Juan Li ◽  
Shi Zhong Li ◽  
Xiao Xue Guo
Keyword(s):  
High Mobility ◽  
Extreme Environment ◽  
Simulation Software ◽  
Search And Rescue ◽  
Working Environment ◽  
Ground Model ◽  
Motion System ◽  
Unstructured Environment ◽  
Walking Mechanism ◽  
Test Result

For the unstructured extreme environment of coal mine underground accidents, this paper puts forward a multi section crawler search robots. Based on the analysis of the working environment of the robot, underground search robot of crawler - ground model is built , overall configuration of robot that can cross obstacles flexibly in the complicated unstructured environment is put forward, high mobility of walking mechanism and joint module are designed and simulate by simulation software MATLAB, which provides the basis for establishing systematic engineering prototype and completing engineering test result.

Micro-Defects Test Simulation Analysis and Experiment Research under Alternating Electromagnetic Excitation

2013 ◽  
Vol 798-799 ◽  
pp. 452-455
Author(s):  
Xia Yu ◽  
Wei Ming Zhang ◽  
Zhong Chao Qiu ◽  
Cheng Feng Chen
Keyword(s):  
Simulation Analysis ◽  
Crack Depth ◽  
Simulation Software ◽  
Good Effect ◽  
Electromagnetic Simulation ◽  
Test Results ◽  
Current Field ◽  
Electromagnetic Excitation ◽  
Simulation Results ◽  
Alternating Magnetic Fields

Alternating current field Measurement is one of the important progresses about electromagnetic nondestructive testing in recent years. Alternating magnetic fields excitation testing model is established by using electromagnetic simulation software ANSOFT, a flat plate crack defects are simulated. By analyzing its principle, crack depth and the width change influence on test results, finally the simulation results are verified by the method of experiment. The experimental results are consistent with the simulation results. The results show that this differential probe has good effect on crack defects test.

Sign in / Sign up

Export Citation Format

Share Document