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Add another RF example, drawn from fig. 13.2 of 

https://qucs-help.readthedocs.io/en/spice4qucs/RF.html
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Holger Vogt 2022-01-14 18:33:01 +01:00
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commit 36da24e251
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Example of VSRC as voltage ports
* https://qucs-help.readthedocs.io/en/spice4qucs/RF.html fig. 13.2
*
*
V1 in 0 dc 0 ac 1 portnum 1 z0 50 ; pwr 0.001 freq 2.3e9
C1 in 0 318.3n
L1 in out 1.592m
C2 out 0 318.3n
V2 out 0 dc 0 ac 0 portnum 2 z0 50 ; pwr 0.002 freq 3.2e9
.sp dec 100 1 1e6 0
.control
run
display
set xbrushwidth=2
plot mag(S_1_1) mag(S_1_2) mag(S_2_1) mag(S_2_2)
plot S_1_1 smithgrid
plot S_1_2 polar
.endc
.end