Reseach On Marching-on In-time Scheme And The Fast Algorithm Of Time Domain Integral Equation

With the continuous development of communication technology,the mode of communication in human applications are constantly updated and changed.Short-wave communication,an important traditional communication mode,is being challenged by the development of the modern communication technology,it still has many advantages such as the simple structure,low cost,high invulnerability and maneuverability,capability of adapting complex terrain and so on over other communication methods.Through our research,this paper designs a 125 watts shortwave power amplifier.It mainly includes the research value and practical significance of the power amplifier also with the current abroad and domestic technology situation;by made a brief discussion of the principle of several sorts of power amplifier and filters,the paper confirmed design idea of the 125 watts power amplifier and put forward a schemed to be adopted;the paper also explained the design plan of each module,reliability,environmental adaptability and other design emphases in detail,besides,we verified t he design rationality by simulation,debugging and assembling the PCBs,proposed solutions to the spotted problems during debugging period;at last,we tested and verified the 125 watts power amplifier which meets the requirements to the system and summarized.Project mainly focuses on the following aspects:1)Design of the function block diagram and the whole frame of the 125 watts shortwave power amplifier;2)power amplifier module's design and test,index of power amplifier;3)Filter module's design and test;4)Other factors during system design;5)Joint debugging and testing;Simulation and test result show that the 125 watts power amplifier technical targets meet the requirements of system;it can play an important role as a part of transmitter system.