A circular ruler for drawing smith charts
A technology of circular chart and soft ruler, which is applied in the field of teaching aids, can solve the problems of inability to adapt to teaching and high difficulty of software, and achieve the effect of convenient disassembly and simple operation
Active Publication Date: 2021-03-23
AIR FORCE UNIV PLA
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Problems solved by technology
[0007] The purpose of the present invention is to provide a kind of circle chart scale that draws Smith's chart, solves the problem that the existing software of drawing Smith's chart is difficult and can't be adapted to teaching
Method used
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Embodiment Construction
[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] The present invention is a circle ruler for drawing a Smith chart, as shown in Figure 1(a), comprising a first circle ruler 1, a second circle ruler 2, a third circle ruler 3 and a fourth circle ruler 4 , the first circle ruler 1, the second circle ruler 2 and the third circle ruler 3 are all straightedges, and the fourth circle ruler 4 is a ring ruler, as shown in Fig. 1(b), the first circle ruler Both the ruler 1 and the second circle ruler 2 are engraved with reflection coefficient scale lines, reactance value scale lines and resistance value scale lines, the third circle scale ruler 3 is engraved with reactance value scale lines, and the fourth circle scale ruler 4 is engraved with The scale line of reflection coefficient phase, the scale line of the electric length towards the load and the scale line of the electric length towards...
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The circle ruler for drawing the Smith chart disclosed by the present invention comprises a first circle ruler, a second circle ruler, a third circle ruler and a fourth circle ruler, the first circle ruler, the second circle ruler and The third circular scale is a ruler, the fourth circular scale is a circular scale, and the first circular scale and the second circular scale are engraved with reflection coefficient scale lines, reactance value scale lines and resistance value scale lines, The scale line of the reactance value is engraved on the scale of the third circle, the scale line of the reflection coefficient phase, the scale line of the electric length towards the load and the scale line of the electric length towards the signal source are engraved on the scale line of the fourth circle from the inside to the outside. One end of the ruler is movably connected to the first circular ruler, the other end of the second circular ruler is movably connected to the third circular ruler, and one end of the first circular ruler is movably connected to the fourth circular ruler, which solves the problem The existing software for drawing Smith circle diagrams is difficult and cannot be adapted to teaching problems.
Description
technical field [0001] The invention belongs to the technical field of teaching aids, and relates to a circle ruler for drawing a Smith chart. Background technique [0002] A large number of Smith charts are used in the teaching of microwave courses, which are closely related to engineering practice. In order to connect theory with practice, the current measures can be summarized as follows: [0003] In the course of "Microwave Technology and Antenna", on the basis of explaining the basic theory, the Smith chart is used to solve typical problems. It is easy to learn and use, with clear concept and easy operation. However, the problems addressed involve only a few typical applications of the Smith chart. At the same time, in the process of solving the problem, students use the ready-made paper Smith chart. When drawing the matching line, they need to use a variety of tools, and there is no corresponding Smith chart scale on the tool. The measurement and drawing of the circ...
Claims
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IPC IPC(8): B43L13/00
CPCB43L13/00
Inventor 张旭春杨潇谢军伟廖臻亨冯晓宇
Owner AIR FORCE UNIV PLA