Comprehensive Study on the Application of Periodically-Loaded Coupled Line Coupler for Bandpass Filter
碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 101 === A comprehensive study on the applications of periodical-loaded for coupled line coupler for bandpass filter is described in this thesis. Filters normally present themselves as a partial design of transceiver and serve the purpose of removing unwanted frequenc...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2013
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| Online Access: | http://ndltd.ncl.edu.tw/handle/9628w7 |
| Summary: | 碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 101 === A comprehensive study on the applications of periodical-loaded for coupled line coupler for bandpass filter is described in this thesis. Filters normally present themselves as a partial design of transceiver and serve the purpose of removing unwanted frequency components. Traditional coupled line coupler for bandpass filter suffer from oversize problems at lower frequencies, which lead to many restrictions in circuit layouts. These problems can be solved by employing periodical structures for circuit designs to achieve the goal of size reduction. In this thesis, the application of trans-directional periodical structures and contradirectional periodical structures for coupled line coupler for bandpass filter is analyzes. A quarter-wavelength coupled line is to be replaced by a shorter line loaded with periodical transmission-line stubs. In this study, the commercial EM simulator HFSS will be chosen to conduct the required simulations. The simulation results will be confirmed experimentally to prove that the proposed periodical structures can effectively reduce the size of coupled line coupler for bandpass filter.
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