Hello, I get different volt calculated vs. measured in node 2 of simulation below. Can anyone point to where my mistake is?
It should be 0.5 V for 50 Ohm input impedance but only measures to less than 200 mV. Replacing circuit 50 Ohm BNC terminator gives me the correct 500mV. My stuff is available in: http://turkos.aspodata.se/git/openhw/rfid/ the schematics and pcb files are in a flux currently. /// $ cat Todo/antenna_simulation.ckt antenna_simulation V1 1 0 generator(1) ac 1 Ro 1 2 50 C1a 2 4 7.39e-10 C1b 0 3 7.39e-10 C2 2 0 1.65e-09 Cpar 4 3 1e-11 L 4 3 4.4e-07 Rpar 4 3 1500 .option nopage .print ac I(L) V(2) .AC 12.5Meg 14.5Meg 10k > Todo/antenna_simulation.dat .end $ I can calculate resonane, upper and lower 3dB points and Q MHz I(L) V(2) f1: 13.220 0.052022 0.26108 max: 13.560 0.073039 0.49553 f2: 13.900 0.051076 0.43503 Q = 19.9 and I can verifies ok with a loop probe, except that the V(2) comes out at < 200 mV. More details in are available in antenna_simulation.readme. Regards, /Karl Hammar ----------------------------------------------------------------------- Aspö Data Lilla Aspö 148 S-742 94 Östhammar Sweden +46 173 140 57 _______________________________________________ Help-gnucap mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-gnucap
