碩士 / 國立交通大學 / 電信工程研究所 / 102 / In this thesis, we develop the improved mounting structure of a W-band waveguide finline bandpass filter and realize the bifurcated finline diplexer. The proposed W-band finline bandpass filter are implemented with Rogers RT-Duroud 5880TM substrate with a dielectric constant of 2.2, a thickness of 5mil, and a loss tangent of 0.0009. The design procedures of the waveguide finline filter are briefly described as following. Firstly, decide the center frequency, the fractional bandwidth, and the order of filter. Then, obtain the Chebyshev low-pass prototype parameters, and transfer these low-pass prototype parameters into a series of coupling coefficients and external quality factor. Finally, by using the 3D EM simulation software HFSSTM get the physical dimensions of the filter. The finline bandpass filters are designed with the center frequencies of 85GHz and 94GHz. The filters are categorized as the unilateral finline filter with 3-orser and 4-order and a fractional bandwidth of 3%, and the bilateral finline filter with 3-order and 4-order and a fractional bandwidth of 1% and 3%. All of the filters are with the proposed mounting structure to improve the repeatability of the assembling process. Applying the bifurcated structure, we design a diplexer with center frequencies of 85GHz and 94GHz both with a unilateral 3-order and 3% filters. In order to improve the efficiency of simulation, we use circuit simulation software ADS combined with the HFSS to simplify our simulation process.
| Identifer | oai:union.ndltd.org:TW/102NCTU5435130 |
| Date | January 2014 |
| Creators | Chiu, Shih-Liang, 邱士量 |
| Contributors | Chang, Chi-Yang, 張志揚 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 74 |
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