Polarization synthesis experiment teaching device and operating method
A teaching device and synthetic experiment technology, applied in teaching models, educational tools, instruments, etc., can solve the problems of large device volume, many auxiliary facilities, unfavorable understanding and learning of polarization concepts, etc.
Inactive Publication Date: 2020-06-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
However, the concept of polarization is relatively abstract, and it is difficult for students to understand it. The study of polarization theory has always been the focus and difficulty in the teaching of electromagnetic fields and waves
At present, some domestic colleges and universities use microwave spectrometers and grating plates to carry out the polarization experiment teaching of electromagnetic fields and electromagnetic waves. This type of device mainly focuses on the optical characteristics of electromagnetic waves to carry out demonstration and verification experiments on the optical characteristics of electromagnetic waves. In addition, the device is large in size. There are many auxiliary facilities and the experimental process is cumbersome. The teaching of polarization experiments is complicated and not intuitive enough, which is not conducive to students' understanding and learning of the concept of polarization.
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[0029] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0030] The polarization of a uniform plane wave is an important concept in electromagnetic field theory, which characterizes the time-varying characteristics of the orientation of the electric field intensity vector at a given point in space, and is represented by the trajectory drawn by the tail end of the electric field intensity vector E in space. If the trajectory is a straight line, it is called a linearly polarized wave; if the trajectory is a circle, it is called a circularly polarized wave; if the trajectory is an ellipse, it is called an elliptical polarized wave.
[0031] The electric field vector of a uniform plane electromagnetic wave is always perpendicular to the direction of propagation, and it can generally be expressed as two mutually perpendicular components. by Take the electromagnetic wave in the direction as an example, the electric ...
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The invention relates to a polarization synthesis experiment teaching device and an operating method. The distance between two transmitting antennas which are orthogonal in a polarization mode in thepolarization synthesis experiment device is adjusted; the two beams of electromagnetic waves have different phase differences at the aperture of the receiving antenna, so that the electromagnetic waves with different polarization forms are synthesized. The synthesized electromagnetic wave signals are received by rotating the receiving antenna, and the polarization form of the synthesized electromagnetic waves is judged according to the change of readings of the frequency-selective amplifier at different angles. Therefore, students can more visually understand the synthesis process of differentpolarization modes of electromagnetic waves and verify corresponding principles through the polarization synthesis experiment device.
Description
technical field [0001] The invention relates to the technical field of teaching experiment instruments, in particular to a polarization synthesis experiment teaching device and an operation method. Background technique [0002] "Electromagnetic Field and Electromagnetic Wave" is a professional basic course required for undergraduates majoring in electronic information and electrical information in colleges and universities. The polarization characteristics of electromagnetic waves is a very important theory, and it is another important information that can be used besides time domain, frequency domain and air domain information. It is widely used, so it is of great significance to the study, research and application of polarization theory. However, the concept of polarization is relatively abstract, and it is difficult for students to understand it. The study of polarization theory has always been the focus and difficulty in the teaching of electromagnetic fields and waves....
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IPC IPC(8): G09B23/18
CPCG09B23/181
Inventor 董李静胡冰郑沛孙厚军
Owner BEIJING INSTITUTE OF TECHNOLOGYGY