Electromagnetic Compatibility Analysis Method for FBAR Devices

2015 ◽  
Vol 719-720 ◽  
pp. 452-460
Author(s):  
Yang Gao ◽  
Bin Zhou ◽  
Yi He ◽  
Wan Jing He
Keyword(s):  
Electric Fields ◽  
Electromagnetic Interference ◽  
High Frequency ◽  
Electromagnetic Compatibility ◽  
Effective Permittivity ◽  
Element Model ◽  
Acoustic Resonator ◽  
Simulation Software ◽  
Property A ◽  
Compatibility Analysis

With the increasing of resonant frequency and integration of film bulk acoustic resonator (FBAR), the electromagnetic interference (EMI) of FBAR devices appears to be extremely important. The electric fields of the common electrical model and finite element model are assumed to be quasi-static and cannot simulate the electromagnetic (EM) property. A 3-D EM model of FBAR is achieved by means of high frequency EM simulation software HFSS. A real-time simulation of EM distributed effects, EM coupling and piezoelectric effects is achieved by employing an effective permittivity in the EM model. The effects of the high frequency EM distributed effects and the EM coupling on resonant characteristics are analyzed. By optimizing the distance between FBAR and components, introducing substrate materials with different permittivity, the EM coupling is effectively reduced.

Novel Thermal-Electrical-Mechanical Model for Simulating Coupled Phenomena in High-Frequency Electronic Devices

2013 ◽  
Vol 538 ◽  
pp. 173-176
Author(s):  
Jing Zhang
Keyword(s):  
Finite Element ◽  
Electric Fields ◽  
High Frequency ◽  
Electronic Devices ◽  
High Stress ◽  
Element Model ◽  
Wide Bandgap ◽  
Operating Conditions ◽  
Element Approach ◽  
High Electric Fields

We present a fully coupled thermal-electrical-mechanical finite element based model to study material degradation behaviors of high-frequency electronic devices. The mechanisms of degradation and ultimately failure in wide bandgap (WBG) devices are very complex. Under operating conditions, the devices are usually subject to high electric fields, high stress/strain fields, high current densities, high temperatures and high thermal gradients. Moreover, these phenomena are coupled together. The presented finite element model is capable of computing stress, temperature, and electric fields based on an innovative finite element approach for the solution of non-linear coupled thermal-electrical-mechanical problems. The model can be applied to wide bandgap electronic devices to address major issues of performance and lifetime.

Reliability Design of Control Circuit for Quartz Crystal Feeding System

2014 ◽  
Vol 722 ◽  
pp. 222-225
Author(s):  
Tao Yan ◽  
Gui Qin Jin ◽  
Ze Ding Wei
Keyword(s):  
Electromagnetic Interference ◽  
High Frequency ◽  
Electromagnetic Compatibility ◽  
Quartz Crystal ◽  
Feeding System ◽  
Large Power ◽  
Laser Marking ◽  
Reliability Design ◽  
Crystal Laser ◽  
Design And Manufacturing

Quartz crystal laser marking is the last process of quartz crystal production, and quartz crystal automatic feeding system works in harsh environment, like high frequency, strong electromagnetic interference, static electricity and large power, and feeding system itself also contains many electromagnetic interference factors, To ensure the system working stably and reliably, in the design and manufacturing of control system, using high quality components, the reasonable wiring and grounding, in the aspect of electromagnetic compatibility, hardware and software anti-interference measures were taken. Through a lot of test working in the laboratory and field, and the design scheme was modified for many times, it finally makes that the feeding system is so stable in the workplace that it could meet the requirements of the customer, and it has a certain guiding significance for the design of other mechanical and electrical products production.

scholarly journals Analysis of Permanent Magnet Motors in High Frequency—A Review

2021 ◽  
Vol 11 (14) ◽  
pp. 6334
Author(s):  
Yerai Moreno ◽  
Gaizka Almandoz ◽  
Aritz Egea ◽  
Beñat Arribas ◽  
Ander Urdangarin
Keyword(s):  
Finite Element ◽  
Electromagnetic Interference ◽  
High Frequency ◽  
Electromagnetic Compatibility ◽  
Equivalent Circuit Model ◽  
Design Parameters ◽  
Electrical Machine ◽  
Element Analysis ◽  
Electrical Equivalent Circuit ◽  
Electric Drives

Electric drives consume a great amount of the world’s energy, and it will keep increasing due to the electromobility trend. Thus, the efficiency of electric drives must be improved to reach the desired sustainability goal. The Silicon Carbide devices contribute to this objective due to their high working frequency and lower switching losses. However, working at higher frequencies may bring serious Electromagnetic Compatibility (EMC) problems, as well as insulation stress and higher bearing currents. Hence, it is important to have an electrical machine electrical equivalent circuit model to predict the electromagnetic interference levels. This review summarizes the current state of the art in electrical machine modeling and analysis in high frequency. The main analysis tools as Finite Element Methods, analytic and measurement-based tools are compared in their application on high-frequency electrical machine analysis. Then, different machine high-frequency models are reported, detailing their individual features. Additionally, the influence of the machine design parameters in EMC behavior is outlined for future analysis. All in all, Finite Element analysis is the most accurate tool for high-frequency analysis, provided that mesh size is thinner than the skin depth. It is also concluded that the winding placement is an essential parameter to define the high-frequency behavior of the machine.

Prediction Analysis of Electromagnetic Interference Based on Gray Prediction Theory

2010 ◽  
Vol 44-47 ◽  
pp. 3731-3735
Author(s):  
Hui Juan Zhang ◽  
Yan Ting Wang ◽  
Shi Tao Wang ◽  
Meng Wu
Keyword(s):  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Simulation Software ◽  
Electromagnetic Simulation ◽  
Test Results ◽  
Prediction Theory ◽  
Prediction Analysis ◽  
Electromagnetic Transient ◽  
Gray Prediction ◽  
Electromagnetic Transient Simulation

The paper introduces a new method for prediction of electromagnetic compatibility in the power system, and use the Electromagnetic simulation software ATP. By comparing the actual test results to the simulation results, it is proved that electromagnetic transient simulation is reliable and effective. It also introduces the Gray prediction theory to predict the next Electromagnetic Interference (EMI) of the substation. It is high practical to research and analyze the substation electromagnetic compatibility, and feasible to use the Gray prediction theory with multivariable for the model EMI prediction analysis.

scholarly journals Electromagnetic Spectrum of the Corona Discharge and Their Fundamental Frequency

2021 ◽  
Author(s):  
Luis E. Martínez Santos ◽  
Roberto Linares y Miranda ◽  
Fermín P. Espino-Cortés
Keyword(s):  
Corona Discharge ◽  
Electromagnetic Interference ◽  
High Frequency ◽  
Communication Systems ◽  
Electromagnetic Compatibility ◽  
Design Criterion ◽  
Past Century ◽  
Electromagnetic Spectrum ◽  
Radio Communication ◽  
High Voltage Direct Current

Historically, the Electromagnetic Compatibility (EMC) began with the disturbances at the radio navigation systems generated by the electrical power distribution lines; hence it was referred to as Radio Interference (RI). This disturbance is an Electromagnetic Interference (EMI). Although this type of EMI has been studied since the first decades of the past century, it still maintains a continued interest of the researchers, especially with the Corona Discharge (CD), generated by High Voltage Direct Current (HVDC) systems. Because of its design criterion and the concern that this phenomenon may affect the new radio communication systems in the very high frequency (VHF), ultra high frequency (UHF), and microwave bands, interest in their studies continues. In this chapter, an analysis of the electromagnetic spectrum of the CD is presented. The CD is generated at a short transmission line located within a semi-anechoic chamber. To be sure of the phenomenon, the CD is identified by its current pulse, which is well studied. The instruments used are an oscilloscope of 2 GHz and 2 GS/s, a spectrum analyzer, and an EMI test receiver. The results show that the CD concentrates its energy at frequencies below 70 MHz. In the UHF band, only narrowband signals very separated were found, with levels that cannot affect radio communication systems.

High Frequency Impedance Model of Electric Vehicle Traction Battery

2013 ◽  
Vol 668 ◽  
pp. 506-509
Author(s):  
Zong Yu An ◽  
Quan Di Wang ◽  
Yong Ming Yang
Keyword(s):  
Single Cell ◽  
Electric Fields ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Impedance Measurement ◽  
Impedance Model ◽  
In Series ◽  
Impedance Curve ◽  
High Voltage Supply ◽  
Motor Drive System

The application of the high-voltage supply system and the motor drive system in electric and hybrid-electric vehicles can leads to a significant increase in electromagnetic compatibility. The influence of traction batteries as part of the electromagnetic interference path must be considered. In this paper models of single cell, cells connected in series and cells connected in parallel are developed based on the measured impedance curve of single cell, the models are formulized in the frequency domain and verified by impedance measurement on Ni-MH batteries, the results allow the simulation of batteries as interference path and the prediction of external electric fields and magnetic fields.

scholarly journals High-Frequency Electromagnetic Interference Diagnostics

2021 ◽  
Author(s):  
Ling Zhang ◽  
Yuru Feng ◽  
Jun Fan ◽  
Er-Ping Li
Keyword(s):  
Statistical Analysis ◽  
Electromagnetic Interference ◽  
High Frequency ◽  
Electromagnetic Compatibility ◽  
Measurement Techniques ◽  
Emission Source ◽  
Far Field ◽  
Large Network ◽  
Typical Type ◽  
Coupling Path

Electromagnetic interference (EMI) is becoming more troublesome in modern electronic systems due to the continuous increase of communication data rates. This chapter reviews some new methodologies for high-frequency EMI diagnostics in recent researches. Optical modules, as a typical type of gigahertz radiator, are studied in this chapter. First, the dominant radiation modules and EMI coupling paths in an explicit optical module are analyzed using simulation and measurement techniques. Correspondingly, practical mitigation approaches are proposed to suppress the radiation in real product applications. Moreover, an emission source microscopy (ESM) method, which can rapidly localize far-field radiators, is applied to diagnose multiple optical modules and identify the dominant sources. Finally, when numerous optical modules work simultaneously in a large network router, a formula based on statistical analysis can estimate the maximum far-field emission and the probability of passing electromagnetic compatibility (EMC) regulations. This chapter reviews a systematic procedure for EMI diagnostics at high frequencies, including EMI coupling path analysis and mitigation, emission source localization, and radiation estimation using statistical analysis.

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