Basic knowledge of microwave circuits and design 6-9 6. Microwave circuit computer-aided design technology and commonly used CAD software Since the 1970s, microwave circuit CAD technology has made great progress. On the one hand, various CAD software manufacturers have launched many general and special microwave circuit CAD software products, including electrical schematic input and microwave circuit graphic input, circuit simulation and optimization, tolerance analysis, layout generation and output, and interface with test instruments. There are many circuit model libraries, component libraries, linear model libraries and nonlinear model libraries of semiconductor devices to choose from. It can be said that it is powerful, easy to use, and has everything. On the other hand, microwave circuit CAD software has also been widely used in the design of various microwave circuits and has become a design tool that microwave engineers must master. 6.1 Commonly used microwave circuit CAD software Microwave circuit CAD software can be roughly divided into the following categories: ① Linear/nonlinear microwave circuit simulation software; ② 2.5D planar circuit electromagnetic field simulation software; ③ 3D electromagnetic field simulation software; ④ System simulation software; ⑤ Design software for special circuits. ⑥ Typesetting software Table 2 Introduction to main microwave circuit CAD software | Serial number | Name | Main performance | Manufacturer | | 1 | ADS | Comprehensive software package | Agilent | | 2 | Serenade | Comprehensive software ...
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