Microwave Tube Electromagnetic Focusing System Cad Technology

The microwave tube is the main component of microwave band transmitter. To satisfy the equipment demand, many research institutes and factories carried on fruitful development in the latest years. This subject begins according to this background. Author's main work is to complete the focusing system CAD technical research in the microwave tube, concretely, using C to imitate electromagnetic focusing system.The magnetic system is the important component of the microwave electronic tube. It influences working frequency, power, efficiency, noise coefficient , stability, duration of the microwave electronics tube directly. And the weight of the microwave electronics tube is mainly decided by the weight of magnetic system. Therefore, the establishment of the magnetic field, the design manufacturing of magnetic system is an important content of microwave electronics tube developing.In the microwave tube, it's function is largely decided by the quality of the electronics injection, that is layer flowing, rigid, passing rate etc, so acquiring high quality electronics injection is also an important question. Because electronic injection is the electronical gathering, existing space charge force. If we don't take special measures, the electronics injection will immediately dissipate when it outputs anode. To keep the shape of the electronics injection, we have to use external force to banlance the dissipate force of the space electric. The binding force in addition can be produced by the static electricity field, using magnetic field to produce as well. These two kinds of methods are all once used in the history. We used electricity coil to get the magnetic field at the earliest time, With its physical volume and the weight becoming big, and needing the storm drain of the weakness of electric current and the powers, permanent magnet focusing gradually replace electricity coil focusing. But, with the improvement of material and technology, electricity coil focusing still desirable at some situation. How to design magnet focusing system is very important. Focusing system is the important component of microwave electronics optics ,the main research work of this article is:Focusing system is the important component of microwave electronics optics, the main research work of this article is:(1)Author introduces several common numerical integration methods and electromagnetics calculation methodThe common numerical integration methods are mechanical quadrature, Newton-Cotes, Gauss, rehabilitation quadrature, Romberg accelerated algorithm and so on. And introduces Romberg accelerated algorithm. Finally introduces the flow chart of Romberg accelerated algorithm.(2) Then author discusses the basic theory of microwave electronic tube electromagnetic focusing systemFinally author discusses the designing of focusing system. Author elaborates the basic methods and advantage and disadvantage of line package focusing.(3)Electromagnetic focusing system simulationFinally, Author makes numerical integration and simulation for two kinds of helix solenoids, obserbvating the results of simulation. And author discusses the magnetic distribution of two kinds of helix solenoids.