Design of Parallel Coupled Coplanar Waveguide Filter

• Main Authors: Jean,You-ken, 簡有崑
• Other Authors: Ruey Beei Wu
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/49620164377369970986

碩士 === 國立臺灣大學 === 電機工程研究所 === 84 === This thesis presents the design of three new coplanar waveguide filters, including the fork type、grounded type bandstop filters and the fork grounded type bandpass filter. The filters are built from cascading several sections of quarter wavelength coupled transmission lines. After a suitable analysis based on the model decomposition theory, each section is maded equivalent to an admittance inverter essential in the filter design. Several design charts are provided in yielding the geometrical parameters of each section to implement the desired admittance inverter. By neglecting the eqasi-static equivalent lumped circuit models of the discontinuities near the points of two sections, the equivalent models of coupled transmission lines are evaluated and incorporated into SPICE simulation to investigate more thoroughly the filter characteristics. The agreement between simulation results and experimental data justifies the design procedure and validates the present analysis approach.