![]() But I'm not 100% satisfied with my solution. But that was all L and C matching because it was just for a couple 100 MHz, so no transmission line matching there) (All this is kind of embarrassing because 5 years back I worked in an RF lab and working with the SC was a common task for me. I'm totally lost, Monday is exam and I'm totally crapping my pants here So if anyone has a good explanation for a panicking student I'll be incredible grateful. That makes things a bit more complicated. Matching with Parallel / series L or C But no explanation on how to find the ZL if I have a series open/short stub with a given length Additional "boundary condition" to the solution: AFAIK in the exam we are only given a Impedance Smith chart, no admittance Smith Chart. Inserting parallel Open/short stubs and finding out the length 4. ![]() Inserting series open/short stub with ZL=Z0 and finding out the length 3. Matching a real Zload to a real Z by inserting a series Transmission line (not series open/short stub) with ZL unequal to Z0 and finding out ZL 2. I already watched several videos and documents explaining smith chart matching. 3.75GHz 200 Ohm Generator -> lambda/8 Parallel open stub -> lambda/8 series short stub -> 50 Ohm load (Length is lambda/8 because it should filter out 7.5GHz for which the 10mm are lambda/4) The goal is to find the impedances ZL1 and ZL2 of the transmission lines. ![]() I have a circuit like in the attached image. ![]()
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