Microwave Circuit Design Basics Basic Knowledge of Microwave Circuit and Design 1. Basic Knowledge of Microwave Circuit 2. Microwave Network and Network Parameters 3. Smith Chart 4. Simple Matching Circuit Design 5. Computer-Aided Design Technology of Microwave Circuit and Commonly Used CAD Software 6. Commonly Used Microwave Components and Their Main Technical Specifications 7. Design, Calculation and Specification Allocation of Microwave Channel Subsystem 8. Test and Test Instrument 9. Application Circuit Examples Microwave Circuit and Design 1. Overview Microwave circuits usually refer to circuits with a wavelength of 10m to 1cm (i.e. 30MHz to 30GHz) in the working frequency band. In addition, there are millimeter waves (30 to 300GHz) and submillimeter waves (150GHz to 3000GHz). In fact, circuits with higher working frequencies are often called \"high-frequency circuits\" or \"radio frequency (RF) circuits\" and so on. Since microwave circuits have higher working frequencies, they have many differences and unique features compared with general low-frequency circuits and digital circuits in terms of materials, structures, circuit forms, components and design methods. As an independent professional field, microwave circuit technology has developed very maturely in terms of theory, materials, processes, components, and design technology, and its application fields are becoming more and more extensive. In addition, with the rapid development of large-scale integrated circuit technology, the current operating speed of chips has exceeded 1GHz. In the design of chips, packages, and application circuits of these high-speed circuits, some microwave circuit design technologies have also been fully applied. The boundaries between traditional low-frequency circuits and digital circuits and microwave circuits will become increasingly blurred, and there will be more and more mutual reference and comprehensive technical applications. 2. Basic knowledge of microwave circuits 2.1 Circuit classification 2.1.1 Classification by transmission line Microwave circuits can be classified according to the properties of transmission lines, such as: Figure 1 Microstrip line Figure 2 Stripline Figure 3 Coaxial line Figure 4 Waveguide Figure 5 Coplanar waveguide 2.1.2 Classification by process Microwave hybrid integrated circuit: hybrid integration using discrete components and distributed parameter circuits. Microwave integrated circuit (MIC): using tube core and ceramic substrate. ……
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