| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 101 === This thesis is included two parts, the first part introduces a dual-band equal power divider in chapter 3 and the second part of chapter 5 is about dual-band bandpass filter. In order to improve the traditional Wilkinson power divider, the transmission lines have been converted into parallel coupled lines. Moreover, the mathematical analyses are provided to verify and adjust the design of the dual-band power divider.
The second part of chapter 5 is the dual-band bandpass filter. Two kinds of dual-band bandpass filters are introduced. The first one is that series open stub at each end of parallel coupled lines, it makes transmission zeros at two resonant frequency. The other is dual path dual-band bandpass filter, through analysis and verification to design a rectifiable frequency and bandwidth dual-band bandpass filter, and using interdigital capacitance compensation to solve the phase difference between the even mode and odd mode of parallel coupled lines. Finally, combine the dual-band equal power divider and dual-band bandpass filter above, to achieve a filtering function of dual-band equal power divider.
All the circuits are simulated with full-wave electromagnetic simulator. The results are well match between electromagnetic simulations and measurements can evidence the availability of all proposed circuits.
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