Design of a dual-band bandpass filter with a wide rejection band
Date Issued
2009
Date
2009
Author(s)
Huang, Wei-Shiang
Abstract
We use two methods to suppress the spurious frequency of three dual band bandpass filters in this thesis. The first 3rd dual band filter was composed of stepped impedance resonators. We can achieve dual band and a wide rejection band effectively by arranging the relationship between the base frequency and the spurious frequency skillfully. For the second filter, we introduce interdigital capacitance with stubs and open stubs to produce zeros, and try to locate these zeros in the location of the spurious frequency, therefore we also can achieve a wide rejection band. We also use open stubs to produce zeros and achieve a wide rejection band in the last filter design. The three filters have their pros and cons respectively. Users can choose the best one according to the range and specification of applications. Also, the experimental results show that our filter design is feasible.
Subjects
wide rejection band
dual band
filter
Type
thesis
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