Analysis And Design Of Microwave Bandpass Filter

Band-pass filter (BPF) is the most used in the filters of all, the most important and also the most difficult to design a filter. Through analysis of the characteristics of microwave filters, research step impedance resonator (SIR) the characteristics of using SIR structure of the microwave band-pass filter design to bring about such an efficient filter rapid design. Meanwhile, with the improvement of computer performance, as well as microwave for the further development of CAD technology, high-frequency electromagnetic simulation software simulation accuracy and efficiency continuously improve, can be the equivalent circuit of traditional design methods with high-frequency electromagnetic simulation software integration, improve design the accuracy and shorten the development cycle of microwave filters, the use of CAD software technology to achieve microwave filter design and theoretical research also has practical significance.In this paper, microwave band-pass filter design, the new structure, suppression filter stopband filter and the improvement of a small analysis and research. Major work include the following:1. Step impedance analysis resonator (SIR) structure and related principles, with emphasis on analysis of the fundamental characteristics such as SIR: resonant conditions, resonant length, frequency and spurious Equivalent circuit.2. The research designs the microwave bandpass filter with the SIRprinciple the design method, and analysis different impedance ratiomicrowave bandpass filter between characteristic.3. Research SIR filter stopband inhibited improvements to eliminate the effects of parasitic passband.4. Using EDA tools filter design method. The use of EDA tools for analog filter design experiments, in order to design filters, the formation of a filter design of a simple and efficient common method, especially for the complex geometry of the filter.