Simulation Of Circuits For Sending And Receiving Electromagnetic Wave Signal In Physics Courses For High School

Significant changes have been taken place during the revolution of high school physics class. The main propose of this revolution is to improve course teaching and thus help students have practical experience on the process on scientific research and further understanding for scientific methods. Moreover, the purpose to enhance students’experiment ability and have recognition to the impact of physics on scientific and technological progress as well as the cultural, economic and social development, gives high school physics teacher higher requirements.In this thesis, NI Multisim11.0is used for circuit design and virtual simulation of circuits for sending and receiving electromagnetic wave signal, and to help students have a clear and intuitive understanding on electromagnetic waves and information society. We expect to promote the independent learning of high school students and develop their scientific exploring ability.The main contribution of this research through the virtual simulation and analysis of circuits for sending and receiving electromagnetic wavesignal is described below:First, it is the simulation and analysis of circuits for sending and receiving electromagnetic wavesignal. This section contains3parts. First, the introduction gives a overview to the experiment environment in the high school and the need of the virtual experiment. The second part is circuit and simulation for the signal sending circuit, including simulation and analysis of the sine wave oscillator circuit, amplitude modulation circuit and FM circuit. Third, circuit and simulation for the signal receiving is introduced, including circuit design, simulation and analysis on the amplifier circuit, wave detection circuit and frequency discriminator circuit.Secondly, some research is done on the electronic technology-related issues with the NI Multisim with the purpose to let high school students master the basic measurement of high-frequency circuits observation techniques through the Multisim simulation experiments and practice, and learn more about the technical characteristics of the basic electronic components and electronic technology constraints, master the basic features of the components and applications of analytical methods.The simulation results enable high school students to directly sense the generation, modulation, and receiving procedure of electromagnetic wave without analyzing complex circuit schematic. It enhances the interest and enthusiasm of the students to explore and learn electromagnetic wave.