TAILIEUCHUNG - ADS Tutorial #4 Filter Design Oklahoma State University

ADS Tutorial #4 Filter Design Oklahoma State University Part I Synthesis Filters with Lumped Circuit Elements From the top menu click “tool”, and then select “E-Syn” to start it. Click on the “Select Type” button on the top right corner, a menu will pop up and we can select the type of filters. Suppose we need to synthesis 3rd order Chebyshev LPF, and then we can fill the parameter table. Next we click the button for synthesis, and a small window will pop up. Click on the “synthesis” button on the lower left corner, two designs are available, one is CLC circuit. | ADS Tutorial 4 Filter Design Oklahoma State University Part I Synthesis Filters with Lumped Circuit Elements From the top menu click tool and then select E-Syn to start it. Click on the Select Type button on the top right corner a menu will pop up and we can select the type of filters. Suppose we need to synthesis 3rd order Chebyshev LPF and then we can fill the parameter table. Next we click the button for synthesis and a small window will pop up. Click on the synthesis button on the lower left corner two designs are available one is CLC circuit and the other is the LCL circuit where the value of the components are available Design I LCL circuit Input Term Resistive R 50 Ohm IND SE L nH CAP PG C pF IND SE L nH Output Term Resistive R 50 Ohm Design II --- CLC circuit Input Term Resistive R 50 Ohm cAp pg C pF IND SE L nH CAP PG C pF Output Term Resistive R 50 Ohm And then one can simulate the design by clicking the Analyze button which is the top one on the right column in the same small window. Another window will pop up where we can input the simulation parameters. The simulation result can be shown by click the Data Display button on top of the large menu which is the same as the one we used previously. The simulated insertion loss and group delay are show in the following. freq GHz freq GHz For comparison the Bessel linear phase LPF is synthesized and simulated in the same way the results are shown in the following 1 25 We can generate a customized system level filter in the schematic design window click Tool E-Syn Place New Design for Synthesized Network after we input the name of it a filter symbol will appear on the schematic design sheet. One can check its subcircuit by clicking the icon with a downward arrow. In the future we can use it as a system level part which can be found in the library we can have a check and put another copy on it onto the design sheet. Port P1 Num 1 C----------- C1 C pF

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