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Title: | Analysis and designs of symmetrical six-port microstrip couplers | Authors: | CHEN YUAN | Keywords: | Microstrip components, multiport networks, | Issue Date: | 6-Mar-2009 | Citation: | CHEN YUAN (2009-03-06). Analysis and designs of symmetrical six-port microstrip couplers. ScholarBank@NUS Repository. | Abstract: | Transmission-line analysis has been employed to derive closed-form eigen-admittance expressions that can be used to predict the scattering coefficients of symmetrical six-port microstrip couplers which may be implemented in a diversity of structural forms. The compilation of these analytical formulas forms the basis of the computer model. The wide range of add-on design options that are available provides greater flexibility in the optimization search for symmetrical six-port microstrip couplers that are suitable for selected applications. Laboratory measurements have confirmed that the resulting six-port prototypes meet the design specifications over bandwidths of 49% for six-port reflectometer application, 36% for five-way power division/combination application and 6% for three-way crossover application. The experience gained during the analysis and design of the six-port crossover has been extended to analyze and design a four-port crossover. With its reduced structural complexity, the resulting prototype is able to yield a measured bandwidth of 20%. | URI: | http://scholarbank.nus.edu.sg/handle/10635/16651 |
Appears in Collections: | Ph.D Theses (Open) |
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Thesis_Chen Yuan_PH.D._ECE DEPT_2008.pdf | 1.32 MB | Adobe PDF | OPEN | None | View/Download |
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