| Summary: | 碩士 === 國立交通大學 === 電信工程系所 === 94 === In this thesis, first we introduce a new structure of dual bandpass filter applying for IEEE 802.11a/b/g. By a serial configuration of a inductive coupled-line (ICL) filter and a capacitive coupled-line filter (CCL) filter, a dual bandpass filter can be designed with a transmission zero between the two passbands. By the two-poles Z matrix analysis, we find that the transmission coefficient of the dual bandpass filter has approximately the same behavior as the individual single-band filter around the corresponding pass-band. The measurements results also agree quite well with the simulation ones. In the next part, a front-end module applied for digital video broadcasting-handheld (DVB-H) is proposed. The module which passband is 470~702MHz includes a bandpass filter, a low noise amplifier (LNA), and a lowpass filter. We integrate the active/passive components by LTCC technology and the measurements almost conform to the specifications.
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