RF Utilities V1.2: smcirc(VSWR,linetype) - File Exchange

Code covered by the BSD License

Highlights from
RF Utilities V1.2

Grp=gdelayc(Snn,Freq,Zo,linet... Plot Group Delay
Grp=gdrawc(Snn,Freq,Zo,linety... Phase Delay trace
L1=ildrawc(Snn,Freq,Zo,linety... Mismatch Loss trace
L1=ilossc(Snn,Freq,Zo,linetyp... Plot Insertion Loss
P1=phdelayc(Snn,Freq,Zo,linet... Plot Phase Delay
P1=phdrawc(Snn,Freq,Zo,linety... Phase Delay trace
R1=rldrawc(Z,Freq,Zo,linetype... Return Loss trace
R1=rlossc(Z,Freq,Zo,linetype)... Return Loss Plot
Sinterp=gmarker1(Snn,Freq1,Zo... Group Delay Marker
Sinterp=imarker1(Snn,Freq,Zo,... Return Loss Marker
Sinterp=phmarker1(Snn,Freq,Zo... Phase Delay Marker
Snn=z2s(Z,Zo) Convert complex impedance Z to S-parameter form
T1=mldrawc(Z,Freq,Zo,linetype... Mismatch Loss trace
T1=mlossc(Z,Freq,Zo,linetype)... Plot Mismatch Loss
Z3=junct(Z1,Z2,Freq); Calculate combined impedances
Zinterp=mmarker1(Z,Freq,Zo,Ma... Mismatch Loss Marker
Zinterp=rmarker1(Z,Freq,Zo,Ma... Return Loss Marker
Zinterp=samarker1(Z,Freq,Zo,M... Admittance Chart Marker
Zinterp=smarker1(Z,Freq,Zo,Ma... Smith Chart Marker
Zinterp=vmarker1(Z,Freq,Zo,Ma... VSWR Marker
Zlist=bexp(Zo,Zload,N) Calculate impedance list for a Exponential taper
Zlist=binmatch(Zo,Zload,N) Calculates a Binomial multi-section impedance matching transformer
Zlist=bklop(Zo,Zload,N,RdB) Calculate impedance list for a Klopfenstein taper
Zlist=bmatch(Zo,Zload,N) Calculates a broadband multi-section impedance matching transformer
Zlist=btri(Zo,Zload,N) Calculate impedance list for a Triangular taper
Zout=cseries(Z,C,Freq) Series Capacitor
Zout=cshunt(Z,C,Freq) Shunt Capacitance
Zout=lseries(Z,L,Freq) Series Inductor
Zout=lshunt(Z,L,Freq) Shunt Inductor
Zout=rseries(Z,R,Freq) Series Resistor
Zout=rshunt(Z,R,Freq) Shunt Resistance
Zout=s2z(S,Zo) Convert S-parameter to complex impedance Z
Zout=term(Zin,Freq) Shunt impedance termination
Zpts=gsmpt(npts,Zo) Graphics Point
Zs=trl(ZoT,Zr,l,Freq,Er,LdB) Transmission line model, Impedance transformation
[Dist,R]=tdr(Zin,Zo,Er,Flist)... Time Domain Reflectometry
[S11,Freq]=citi1s(pathname)
[S11,Freq]=citi1s(pathname)
[S11,S12,S13,S14,...
[S11,S21,S12,S22,Freq]=citi2s...
[S11,S21,S12,S22,Freq]=citi2s...
[S11,S21,S12,S22,Freq]=loads2...
[Sd1d1,Sd1d2,Sd2d1,Sd2d2,... Convert 4-port S-parameter to mixed mode S-param
[Z,Freq]=citi1(pathname)
[Ztran,Risol]=bwilk(N,Zo,Fo) Multi Section Wilkinson Divider
bdraw(Zlist,L,Fo,F1,F2,linety... Plots the performance of the N-section impedance transformer
bphysical(Zlist,L,Fo,Er,d,fil... Generates the physical realisation, in microstrip
bplot(Zlist,L,Fo,F1,F2); Plots the performance of the N-section impedance transformer
filename=setfname() Set the default .DXF filename for the examples
hamwin =hamming1(N); Hamming window function
mat2dxfp(Xp,Yp,Zp,pcolour,lay... Converts vertex coordinate list into polygons
pts=gslbl(ltext) Graphics Label
s=vsdrawc(Z,Freq,Zo,linetype)... VSWR trace
s=vswrc(Z,Freq,Zo,linetype); VSWR Plot
sadmit(Scale,Zo) Plot admittance chart gridlines on linear axis set.
sasub1(mS,Yo) Admittance Chart Subroutine1
sasub2(mS,Yo) Admittance Chart Subroutine2
scomb(Scale,Zo) Plot smith chart and admittance gridlines on linear axis set.
scsub1(ohms,Zo) Smith / Admittance Chart Subroutine1
scsub2(ohms,Zo) Smith / Admittance Chart Subroutine2
smcirc(VSWR,linetype) VSWR circle
smdrawc(Z,Zo,linetype) Smith Chart trace
smith(Scale,Zo) Plot smith chart gridlines on linear axis set
smsub1(ohms,Zo) Smith Chart Subroutine1
smsub2(ohms,Zo) Smith Chart Subroutine2
taywin =taylor1(N); Calculation of modified Taylor distribution for monotonically decreasing
textsc(x,y,txt); Places text at screen coords on current figure.
chapprox.m
contents.m
contents.m
dxftest1.m
dxftest2.m
example1.m
example10.m
example11.m
example2.m
example2a.m
example3.m
example4.m
example5.m
example6.m
example7.m
example8.m
example9.m
exb1.m
exb2.m
exb3.m
exb4.m
exbin1.m
exbin2.m
excomp1.m
exexp1.m
exk1.m
exk2.m
ext1.m
ext2.m
ext3.m
extri1.m
exw1.m
exw2.m
View all files

from RF Utilities V1.2 by Neill Tucker
Routines for Smith Chart, TDR, Mixed-Mode S-params, Matching

smcirc(VSWR,linetype)

function smcirc(VSWR,linetype)
% VSWR circle
%
% Plots circle of constant VSWR on a smith chart in a specified colour.
%
% Usage : smcirc(VSWR,linetype)
%
% e.g.    smcirc(2,'b:')

% N.Tucker www.activefrance.com 2008

p=(VSWR-1)./(VSWR+1);
phi=0:.1256:2*pi;
x=abs(p).*cos(phi);
y=abs(p).*sin(phi);
plot(x,y,linetype);

Highlights from RF Utilities V1.2

Highlights from
RF Utilities V1.2