Single Channel Double Stopband Nc Yig Filter Simulation And Component Software Technology Research

Because of intensive and complex electromagnetic signals in Modern electroniccountermeasures, interference and anti-jamming capability of the electronic system isincreasingly being taken seriously. To defeat the enemy, the electronic system shouldsolve the interference problem first. Because YIG band-stop filter has wide operatingfrequency range, deep stopband stop bandwidth, broadband live tuning, and otheradvantages, it has become the irreplaceable core components of electroniccountermeasures system.The single-channel dual-reject band YIG filter components by digital controldesigned can barrier any frequency signal from2-6GHz and the same frequency signal;also, it can make adjustment of the stop band width and increase the stop band depth tosome degree. This also makes contribution to the increasing of anti-jamming capabilityof the receiver.At first, this thesis illustrated the history, development and trend of YIG filter.Based on the ferromagnetic resonance principle, combined with digital contral workingprinciple, isolator working principle, the design was fixed that consisted by two YIGband rejection filters, two digital drivers and two isolators.In this paper, electromagnetic simulation software, such as MAXWELL3D andHFSS, was employed to build the simulation model and optimize the design of YIGharmonic oscillator and magnetic circuit. Calculated the structual parameters andanalysed the advantage and disadvantage in actual design. Digital contral technologywill be thoroughly analyzed to compensate the YIG band rejection filter by softwarecompensation; the stop band frequency was controlled by the12TTL level and thusachieving the digital controlling of various operating frequency and width from2-6GHz. HFSS electromagnetic simulation software to sumulate the electromagnetic ofthe isolator, to create a center conductor, the3D model of the ferrite substrate, thecavity and to solve the simulation curve to optimize the design of the isolator.The design of the components within the frequency range of2~6GHz single passband dual-stopband stopband depth of up to-100dB with frequency tuning,different frequency tuning is not only separate software control can also be built-insoftwarestop bandwidth adjustment within a certain range. Dual stopband near thefrequency tuning, the2GHz at-40dB bandwidth adjustable in the range of12~25MHz6GHz at-40dB bandwidth is adjustable from45~90MHz range. Power performancetesting is to meet the design requirements. The majority of performance indicators havea large margin; the passband flatness index is closer to the critical value. Furtherstudies in the future work will researtch the reasons.In summary, this thesis illustrated the working theory, design, software simulationand the final design result of single-channel dual-reject band YIG filter by digitalcontrol in details.