This subject aims at designing a series of broadband and medium power solid state amplifier which work in 2~4GHz、4~6 GHz frequency range , using packaged GaAs MMIC and HMIC technology ,power combination technology , basing on analyzing and searching broadband matching technology .

The results of this study indicate that the caustic insert in broadband matching 3 GHz lowpass is less than 1.

To solve the coupled network problem of the communication system, this paper takes an example of designing the lossless equlizer which bases on lowpass Butterworth 20 MHz filter, and use broadband matching to equlize the resistance signal source and frequency dependent load , to get the transducer power gain character which was fixed in advance.

The linear variable gain controlling, input wideband matching and noise optimization methods are analyzed in detail.

Template matching technique is one of the important methods in target recognition.

The radiated field into the half space, the reflected field in the waveguide, and the surface currents on the conducting plane are calculated by means of matching technique between the waveguide cavity and the plane wave expansion of the free space field.

In the paper,the factor influencing the matching technique about LPG used in cars of the frigid zone and the capability of engine in the low temperature condition is studied.