Synthesis Of The Filter With Transmission Zeros

This thesis gave emphasis to the synthesis and design of the filters with transmission zeros. And studied related theories and technologies.Firstly, the synthesis and design of the conventional filters (Butterworth, Chebshev, cauer) and frequency transformation was given as the basic theory; Further more, the general Chebshev filters with transmission zeros was introduced, and a method to extract multi transmission zeros of general Chebyshev filters was presented; Then the general Butterworth filters was brought forward according to the basic idea of the general Chebshev filters with transmission zeros, and the way to synthesis the general Butterworth filters was given out; lastly some typical filters were designed based on the synthesis theory of the filters given before, the result of the simulation and experimentation were matched very well, so the validation and efficiency of the synthesis method was demonstrated.Additionally, the method to design single resonator of the coaxial filters and the way to design the cross-coupling were introduced. And these methods' validation and efficiency were illustrated.