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In this Paper firstly, the CSE (Conducted Spurious Emission) problem induced by shielding can in smart mobile phone design is experimentally analyzed, and the feasible solution is found. Then, the elements of circuits, which can be influenced by shielding can in smart mobile phone are classified into two categories, and they are the components and the micro-strip line. At last, by method of CST simulation...
Directivity, as a characteristic parameter of electromagnetic radiation source, could be used to classify different radiation sources, and the ESD events could be considered as typical sources. The parameter could be measured by electric field intensity radiating in all directions in the space. In this paper, we would build three basic antenna models which are all working at 3GHz and set cube receiving...
Digital modulation error parameters, such as error vector magnitude EVM, is important in test and measurement of information system. This paper introduces the technology research progress in the metrology of digital modulation error parameters. First, we point out the basic problems existing in the field, which is about traceability and parameter range of calibration, and describe the relevant research,...
Electromagnetic Radiation Source Identification (ERSI) is a key technology that is widely used in military and radiation management and in electromagnetic interference diagnostics. The discriminative capability of machine learning methods has recently been used for facilitating ERSI. This paper presents a new approach to improve ERSI by adopting support vector machines, which are proven to be effective...
This paper introduces one method of base station electromagnetic radiation prediction. This method takes geographical features around base station into account and uses 3D ray-tracing algorithm based on antenna pattern of base station in simulation. The method can realize a fast simulation of base station electromagnetic radiation. To verify this method, the paper takes a certain GSM base station...
This paper proposes a kind of multi-resolution terrain which can be used in simulation of electromagnetic wave propagation in complex terrain. Using this kind of terrain can accelerate simulation in a large scale while keeping a high-accuracy result. It can be used as the terrain model when simulating electromagnetic wave propagation. In this paper, the author constructs a multi-resolution terrain...
Wireless power transfer technology via electromagnetic coupling has been widely used in the planar contactless charging platform. In this paper, a current distribution is deduced to ensure axial component of magnetic field is uniformly distributed in the charging region and zero outside the region. Based on continuous current distributions that can generate even axial component of magnetic field,...
This paper presents an anti-interference biconical antenna which is used for wireless communication systems existing an Electromagnetic interference source (EMI). A new method is used to realize directionality without the need for increase in size, which is different from general methods such as using array antenna or adding reflector. The H-plane radiation pattern of the proposed antenna is directional,...
The proliferation of wireless local area network (WLAN) devices has placed a renewed focus on small, integrated, low cost antennas. In this paper, an improved low cost inverted F antenna with two parasitic elements is presented. Compared with conventional inverted F antenna, this antenna can produce wider frequency bandwidth by adding parasitic elements. It can be concluded from the good results of...
It is my pleasure to welcome all friends from home and abroad to attend the Fifth Asia-Pacific Conference on Environmental Electromagnetics, held in Xi'an, China.
Discharge parameters, affected by electrode approach speed, appear their limits for charge voltage Vc =800 V in electrostatic discharge through a handheld-approaching-small rod from charged human body, which reveal the transition to avalanche from surface emission in short-gap ESD. Discharge process is dominated by avalanche phase for Vc = 800 V, which produce discharge current with blunt peak. Discharge...
The effect of the load property on the electrostatic discharge (ESD) current is great. In this paper, the factors affecting the ESD current are analyzed by transmission line theory when the load is linearity. The result indicates that the geometry of the load influences the rise time and the peak value of the ESD current. All the presented results are valuable in researching the electromagnetic interference...
Arbitrary multilayer plate shielding is investigated by equivalent nonuniform transmission line method. A general formula which can be applied to analyze arbitrary multiplayer plate shielding is proposed. This new method utilizes network parameter matrix of nonuniform transmission line to analyze plate shielding effectiveness for the first time. Owing to the discontinuity of nonuniform transmission...
The author has done some research on these issues brought forward in the introduction and given her original opinion by the way of theoretical analysis and experimental validation. There are two great innovative points in this paper. The first one is that the author has used the signal of IS 95 mobile communication system to simulate the stochastic pulses which makes the experiment designed in this...
On discussing GaAs process RF LNA performance of gain, unconditionally stability, noise figure, the design with EMC analysis of a 2.1 GHz low noise amplifier (LNA) implemented with GaAs technology is presented here. Simulation results show this LNA works well centered at 2.1 GHz frequency, with a 16 dB forward power gain (S21) and a noise figure (NF) less than 0.8 dB, also unconditionally stability
At present, the monitoring system of 40 Hz-26 GHz electromagnetic radiation has been accomplished (Zhang Dan, 2005), basing on which , the author puts up the research of the monitoring system of electromagnetic radiation (40 Hz-40 GHz). The article emphatically introduces the software control flow, and presents parts of test results
This paper describes the process of field uniformity calibration of the practical reverberation chamber which has been built in China Academy of Electronics and Information Technology (CAEIT). According to the IEC 61000-4-21 standard, the data which is obtained from the calibration is processed and compared with the IEC standard. In consequence, the advantage that high radiant electric field strength...
With the development of the information technology, especially the wireless communications, the electromagnetic compatibility (EMC) problem between systems becomes more and more important. This paper uses Simulink to analyze the interference between the UAV system and the CDMA system, besides giving some discussion on the result
To research the systems' EMC problem between UAV (unmanned aerial vehicle) and UWB (ultra wide band) is very important and practical to multi-communication-system corporate working. This paper chooses a wireless channel model to research the EMI problem between UAV and UWB systems, which based on Matlab/Simulink. And it gives the simulation experimental analytical results
In this paper, the transmission line theory was used to analyze the electrostatic discharge (ESD) transient process. Finite-difference time-domain (FDTD) method is used to simulate the discharge current being prescribed in the IEC 61000-4-2. The factors influencing the current parameters were examined, the suggestion for designing ESD generator was put forward
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