Design On Dual-mode Microstrip Bandpass Filters

Microstrip dual-mode resonator offers a new method to realize miniature filter. In this thesis, different kinds of new structure filters have been designed by using different microstrip dual-mode resonators.And this thesis studys the cascaded filters.The major job of this paper can be listed as follow:(1)A new structure filter has been designed by using microstrip dual-mode triangular resonator. And the design has been sent to the factory to produce.After testing,make sure the design is true.(2) A new structure filter has been designed by using microstrip dual-mode square resonator.And the design has also been sent to the factory to produce.After testing,make sure the design is true.(3)Study the problem of filter cascading.By using different ways to cascade, two kinds of cascaded filters have been designed. These filters have been sent to the factory to produce. These designs have been proved to be true by testing.