From: Julien Hillairet <julien.hillairet@gm...>  20130430 18:59:48

Dear Carsten, Thank you for your schematic. Indeed, there is maybe a way to do something like you proposed, thank you. In fact yes, it can easily be calculated using transmission lines formulas, at least in simple cases. But for more complicated structures, with many parallel/serie assemblies, it would help me. Best regards, JH 2013/4/29 Carsten Kögler <carsten.koegler@...>: > Maybe with a parameter sweep. something like this: (safe content as .sch > file) > > <Qucs Schematic 0.0.16> > <Properties> > <View=0,0,1551,930,0.826446,0,0> > <Grid=10,10,1> > <DataSet=parameter_sweep_coax.dat> > <DataDisplay=parameter_sweep_coax.dpl> > <OpenDisplay=0> > <Script=parameter_sweep_coax.m> > <RunScript=0> > <showFrame=0> > <FrameText0=Titel> > <FrameText1=Gezeichnet von:> > <FrameText2=Datum:> > <FrameText3=Revision:> > </Properties> > <Symbol> > </Symbol> > <Components> > <.SW SW1 1 860 110 0 51 0 0 "AC1" 1 "lin" 1 "L1" 1 "10" 1 "110" 1 "20" 1> > <COAX Line1 1 450 200 26 16 0 0 "2.29" 1 "0.022e6" 0 "1" 0 "2.95 mm" 0 > "0.9 mm" 0 "L1" 1 "4e4" 0 "26.85" 0> > <Pac P1 1 190 290 18 26 0 1 "1" 1 "50 Ohm" 1 "0 dBm" 0 "1 GHz" 0 "26.85" > 0> > <R R1 1 620 290 15 26 0 1 "1 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 > "european" 0> > <C C1 1 750 290 17 26 0 1 "10 pF" 1 "" 0 "neutral" 0> > <VProbe Pr1 1 340 300 28 31 0 0> > <.AC AC1 1 430 550 0 41 0 0 "lin" 1 "99 MHz" 1 "100 MHz" 1 "2" 1 "no" 0> > </Components> > <Wires> > <620 200 620 260 "" 0 0 0 ""> > <480 200 620 200 "" 0 0 0 ""> > <190 200 300 200 "" 0 0 0 ""> > <620 320 620 410 "" 0 0 0 ""> > <190 410 350 410 "" 0 0 0 ""> > <190 320 190 410 "" 0 0 0 ""> > <190 200 190 260 "" 0 0 0 ""> > <620 200 750 200 "" 0 0 0 ""> > <750 200 750 260 "" 0 0 0 ""> > <750 320 750 410 "" 0 0 0 ""> > <620 410 750 410 "" 0 0 0 ""> > <300 320 330 320 "" 0 0 0 ""> > <300 200 420 200 "" 0 0 0 ""> > <300 200 300 320 "" 0 0 0 ""> > <350 410 620 410 "" 0 0 0 ""> > <350 320 350 410 "" 0 0 0 ""> > </Wires> > <Diagrams> > <Rect 730 730 395 290 3 #c0c0c0 1 00 1 0 0.2 1 1 0.1 0.5 1.1 1 0.1 0.5 > 1.1 315 0 225 "" "" ""> > <"Pr1.v" #0000ff 0 3 0 0 0> > </Rect> > <Tab 1161 832 350 732 3 #c0c0c0 1 00 1 0 1 1 1 0 1 1 1 0 1 40 315 0 225 "" > "" ""> > <"Pr1.v" #0000ff 0 3 1 0 0> > </Tab> > </Diagrams> > <Paintings> > </Paintings> > > > But you could easily calculate that directly with some formulas > > Carsten > > > 2013/4/28 Julien Hillairet <julien.hillairet@...> >> >> Dear Carsten, >> >> Well, I did not made the schematic, but the simplest one would be a >> voltage source + a transmission line + a load. >> >> Ideally, I would like to illustrate (to students for example) how the >> voltage vary along the transmission line. Is there a way to export the >> voltage (or current) at a specific location using octave/matlab ? >> Thus, exporting for many points I could get what I want. >> >> Best regards, >> >> JH >> >> 2013/4/26 Carsten Kögler <carsten.koegler@...>: >> > Hi JH, >> > >> > could you provide a sample schematic? >> > If you have a coaxial line component in your simulation and want to know >> > the >> > position of the hightest voltage (= highest efield) you could split the >> > line in 2 and put a voltage probe in between ( in parallel to the coax, >> > of >> > course) >> > Then you adjust the length of your 2 coax lines until you find the >> > position >> > of the hightest voltage ( tryanderror) >> > >> > Carsten >> > >> > >> > 2013/4/11 Julien Hillairet <julien.hillairet@...> >> >> >> >> Dear Qucs users, >> >> >> >> Do you know if there is a way to plot the electric field amplitude >> >> along a >> >> transmission line (e.g. a coaxial line) with Qucs ? >> >> >> >> What I would like to to, is to determine where are the max voltage >> >> location >> >> (with respect to the source distance for example) in a resonant >> >> circuit. >> >> >> >> Best regards, >> >> >> >> JH >> >> >> >> >> >>  >> >> Try New Relic Now & We'll Send You this Cool Shirt >> >> New Relic is the only SaaSbased application performance monitoring >> >> service >> >> that delivers powerful full stack analytics. Optimize and monitor your >> >> browser, app, & servers with just a few lines of code. Try New Relic >> >> and get this awesome Nerd Life shirt! >> >> http://p.sf.net/sfu/newrelic_d2d_apr >> >> _______________________________________________ >> >> Qucshelp mailing list >> >> Qucshelp@... >> >> https://lists.sourceforge.net/lists/listinfo/qucshelp >> > >> > >> >> >>  >> Try New Relic Now & We'll Send You this Cool Shirt >> New Relic is the only SaaSbased application performance monitoring >> service >> that delivers powerful full stack analytics. Optimize and monitor your >> browser, app, & servers with just a few lines of code. Try New Relic >> and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr >> _______________________________________________ >> Qucshelp mailing list >> Qucshelp@... >> https://lists.sourceforge.net/lists/listinfo/qucshelp > > 