Improving the High-frequency Characteristics of Coaxial-to-Microstrip Vertical Transitions

• Main Authors: Honw-Wei Huang, 黃鴻瑋
• Other Authors: 李士修
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/wgufx5

碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 99 === The thesis is mainly to discuss the transmission characteristics of coaxial-to-microstrip vertical transitions, and to propose a new SMA connector. The main purpose is to improve the high-frequency characteristics of coaxial-to-misrostrip vertical transitions, and increase its 1-dB passband. The 1-dB passband of traditional coaxial-to-microstrip vertical transitions is only 16.4 GHz. The purpose of designing the thesis is that assembling a metallic ring in the traditional SMA connector with an eccentric perforation on the substrate. It reduces the losses of the electromagnetic field changed between coaxial line and microstip line. The thesis uses the simulation tools, HFSS, which is based on the finite element method, and verifies the design by measurement results. The thesis also estimates the transmission characteristics of the proposed vertical transitions, discussing errors of fabricate and combination, and proposes the solutions to improve the errors. Moreover, the thesis discusses the vertical transitions by different substrates and coaxial connectors. The above characteristics confirm the extensive applicability of the proposed coaxial-to-microstrip vertical transitions.