Design and Analysis of Low Temperature Co-Fired Ceramic Filters with Out-of-Band Transmission Zeros

• Main Authors: Kuo-Chiang Chin, 晉國強
• Other Authors: Ching-Wen Tang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/05038811057695586211

碩士 === 國立中正大學 === 電機工程研究所 === 93 === In this thesis, design and analysis of five types of LTCC band-pass and low-pass filter are presented. In the proposed band-pass filters, I use the additional cross coupling such as feedback capacitor between source and load, and grounding inductor among resonators to produce out-of-band transmission zeros and improve the performances of filters. The impedance- and admittance-inverters, and the Y-matrix method are used to derive the initial values of the filters. For low-pass filter, the image parameter method is adopted to calculate the filter’s initial values and the out-of-band transmission zeros. This low-pass filter has broad stop-band. All of the filters mentioned above are simulated by the full-wave EM simulation and fabricated through the LTCC foundry. The measured results match well with simulation has proved the validity and feasibility of the proposed filters.