Hello everybody,

I'am new to Genesys, so of course I'am runnig into some difficulties. What I want to use Genesys for is to match a SAW-Filter via some type of RLC-Network to my stripline impedance and make a worst case analysis over the given tolerances for the used components. So far I reached the first goal and used Genesys to find the optimal values for my RLC Network. For that I used a optimization on the VSWR ratio of my input and output ports. Of course Genesys didn't use only standard values to reach the goal, and since I haven't found a way to limit Genesys on standard values, I corrected them manually afterwards.

Now the hard part, the worst case consideration. I want to know what happens to my impedance matching within the given tolerances of my new found optimal part values. For example the Cap has a Value of 10pF and 5% tolerance, the Resistor 1k and 1% and the inductor 4.7mH and 5%. So my first guess was to use another optimization and setting the tuneable components limits to the tolerance borders. C from 9.5 to 10.5 pF R from 990 to 1010 Ohm and L from 4,465 to 4,975 mH. And after that I'am lost. My idea was to find the maximum VSWR for my circuit using the optimization, but I just don't know how to achieve my goal. Optimization only works if you know what value you're trying to reach, but what else can I use to find the worst possible matching for my used parts?

Greetings from Germany,

Christopher

I'am new to Genesys, so of course I'am runnig into some difficulties. What I want to use Genesys for is to match a SAW-Filter via some type of RLC-Network to my stripline impedance and make a worst case analysis over the given tolerances for the used components. So far I reached the first goal and used Genesys to find the optimal values for my RLC Network. For that I used a optimization on the VSWR ratio of my input and output ports. Of course Genesys didn't use only standard values to reach the goal, and since I haven't found a way to limit Genesys on standard values, I corrected them manually afterwards.

Now the hard part, the worst case consideration. I want to know what happens to my impedance matching within the given tolerances of my new found optimal part values. For example the Cap has a Value of 10pF and 5% tolerance, the Resistor 1k and 1% and the inductor 4.7mH and 5%. So my first guess was to use another optimization and setting the tuneable components limits to the tolerance borders. C from 9.5 to 10.5 pF R from 990 to 1010 Ohm and L from 4,465 to 4,975 mH. And after that I'am lost. My idea was to find the maximum VSWR for my circuit using the optimization, but I just don't know how to achieve my goal. Optimization only works if you know what value you're trying to reach, but what else can I use to find the worst possible matching for my used parts?

Greetings from Germany,

Christopher