Cell phone blocker could be kept in the examination room

a ferrite EMI suppression ferrite is a component types of cubic lattice structure of the ferrous magnetic materials and it's manufacturing process and mechanical properties of ceramics with similar color as the gray and black.
This paper describes the basic principles of magnetic and features to explain it in switching power supply electromagnetic compatibility of the importance, in order for the switching power supply product design in the new product to provide more and better choices.
Second, the propagation characteristics of electromagnetic disturbance, that disturbance of how the source of electromagnetic disturbance spread to sensitive equipment, including conduction and radiation harassment harassment.The cell phone jammer has the record inquiry function . The study is conducted disturbances along the conductor transmission of electromagnetic harassment, harassment that is, radiation from the devices, components, cables, cable or antenna systems and equipment ah electromagnetic radiation disturbance Third, anti-jamming capabilities for the study of sensitive equipment . This immunity of electromagnetic susceptibility or immunity often characterized by the heart, the smaller the level of electromagnetic sensitivity, lower immunity, anti-jamming capability worse. Fourth, the measurement method for measuring equipment and data processing methods study due to the complexity of electromagnetic disturbance, measurement and evaluation need many special requirements, such as measurement receivers have a variety of detection methods, a variety of measurement bandwidth, greater than the load factor, the strict IF filter characteristics, also called the spread of measurement sites characteristics agree well with the theoretical value, etc.With the guarantee of security, cell phone blocker could be kept in the examination room. how to evaluate the measurement results, is also a key problem that requires the application of probability theory, mathematical statistics and other mathematical tools. Fifth, for the system, inter-system electromagnetic compatibility studies. system electromagnetic compatibility refers to a given sub-systems within the system, equipment and electromagnetic compatibility between the components, and for a given system and it runs in which the electromagnetic environment, or other electromagnetic systems electromagnetic compatibility between systems that compatibility, research in this area requires extensive theoretical knowledge and rich experience. It should also be pointed out that the anti-electromagnetic interference electromagnetic compatibility is the expansion and extension, it is the focus of the study device or system of non-expected results and non- performance, emission and non-expected non-response is expected, and harassment in the analysis of superposition and the emergence of probability, need to be considered by the most adverse circumstances, the so-called "most negative principle" than the study of these devices or systems of work performance is much more complex.On the premise of security, people could centralizedly control the cell phone jammer. In short, electromagnetic compatibility study is a comprehensive interdisciplinary, the core is still electromagnetic waves, including its theoretical foundation in mathematics, electromagnetic theory, circuit theory, microwave theory and techniques, antennas and radio wave propagation theory, communication theory , materials science, computer and control theory, mechanical technology, nuclear physics, biomedical, and jurisprudence, sociology, etc. Now, EMC has been closely scrutinized for learning the rapid development of the subject is expected in the 21st century, it will also receive a more rapid development. 0 Introduction of electromagnetic compatibility has become the electronic design and manufacture of hot and difficult problems. How to derive the record in cell phone jammer?the practical application of electromagnetic compatibility issues are very complex, not through theoretical knowledge can be resolved, it is more dependent on the majority of electronics engineers practical experience in order to better address the electromagnetic compatibility of electronic products, primarily to consider the ground) circuit and PCB design, cable design and shielding design and other issues.