Electromagnetic Waves & Antennas Toolbox: swr(Gamma) - File Exchange

Code covered by the BSD License

Highlights from
Electromagnetic Waves & Antennas Toolbox

I0(x) I0.m - modified Bessel function of 1st kind and 0th order.
ab(Gdb)
abadd(type, style, th, g, ray... abadd.m - add gain in absolute units
abadd2(type, style, th, g, ra... abadd2.m - add gain in absolute units - 2pi angle range
abp(th, g, rays, width)
abp(th, g, rays, width) abp.m - polar gain plot in absolute units
abz(phi, g, rays, width) abz.m - azimuthal gain plot in absolute units
abz2(phi, g, rays, width) abz2.m - azimuthal gain plot in absolute units - 2pi angle range
addbwp(Dth, style)
addbwz(Dphi, style) addbwz.m - add 3-dB angle width in azimuthal plots
addcirc(R, Rm, style) addcirc.m - add grid circle in polar or azimuthal plots
addline(phi, style) addline.m - add grid ray line in azimuthal or polar plots
addray(phi, style) addray.m - add ray in azimuthal or polar plots
array(d, a, Nph) array.m - gain computation for 1D equally-spaced isotropic array
binomial(d, ph0, N) binomial.m - binomial array weights
bkwrec(a,b) bkwrec.m - order-decreasing backward layer recursion - from a,b to r
blockmat(d1,d2,n,m,Z,A) blockmat.m - manipulate block matrices
brewster(na,nb) brewster.m - calculates Brewster and critical angles
bwidth(d, ph0, dpsi) bwidth.m - beamwidth mapping from psi-space to phi-space
c2p(z) c2p.m - complex number to phasor form
chebarray(M, sldb) CHEBARRAY Compute chebyshev excitation coefficients for a linear array.
chebtr(na,nb,A,DF) chebtr.m - Chebyshev design of broadband reflectionless quarter-wave transformer
chebtr2(na,nb,M,DF) chebtr2.m - Chebyshev design of broadband reflectionless quarter-wave transformer
chebtr3(na,nb,M,A) chebtr3.m - Chebyshev design of broadband reflectionless quarter-wave transformer
circint(c1,r1,c2,r2) circint.m - circle intersection on Gamma-plane
circtan(c1,r1,c2) circtan.m - point of tangency between the two circles
db(Gab)
dbadd(type, style, th, g, ray...
dbadd2(type, style, th, g, ra...
dbp(th, g, rays, Rm, width)
dbp(th, g, rays, Rm, width)
dbz(phi, g, rays, Rm, width)
dbz2(phi, g, rays, Rm, width)
dguide(f,a,n1,n2,Nit) dguide.m - TE modes in dielectric slab waveguide
diffint(v,s,a,c1,c2) diffint.m - generalized Fresnel diffraction integral
diffr(v) diffr.m - knife-edge diffraction coefficient
dipole(L, Nth) dipole.m - gain of center-fed linear dipole of length L
dmax(th, g) dmax.m - computes directivity and beam solid angle of g(th) gain
dolph(d, ph0, N, R) dolph.m - Dolph-Chebyshev array weights
dolph2(d, ph0, N, R) dolph2.m - Riblet-Pritchard version of Dolph-Chebyshev
dolph3(type, d, N, R) dolph3.m - DuHamel version of endfire Dolph-Chebyshev
dsinc(x)
dslab(R,Nit) dslab.m - solves for the TE-mode cutoff wavenumbers in a dielectric slab
dtft(x, w)
dualband(Z0, ZL, r) dualband.m - two-section dual-band Chebyshev impedance transformer
dualbw(ZL,Z0,r,GB) dualbw.m - two-section dual-band transformer bandwidths
ellipse(A,B,phi) ellipse.m - polarization ellipse parameters
etac(n)
ewa_license
fcs(x)
fcs2(x)
flip(x)
fresnel(na,nb,theta) fresnel.m - Fresnel reflection coefficients for isotropic or birefringent media
frwrec(r) frwrec.m - order-increasing forward layer recursion - from r to A,B
g2z(Gamma,Z0) g2z.m - reflection coefficient to impedance transformation
gain2(L,d,I,N,ph0) gain2.m - normalized gain of arbitrary 2D array of linear sinusoidal antennas
gain2h(L,d,I,N,ph0) gain2h.m - gain of 2D array of non-identical linear antennas with Hallen currents
gin(S,gL) gin.m - input reflection coefficient in terms of S-parameters
gout(S,gG) gout.m - output reflection coefficient in terms of S-parameters
gprop(G2,bl) gprop.m - reflection coefficient propagation
hallen(L,a,M,Nint,type) hallen.m - solve Hallen's integral equation with delta-gap input
hallen2(L,a,E,Nint,type) hallen2.m - solve Hallen's integral equation with arbitrary incident E-field
hallen3(L,a,d,V,M) hallen3.m - solve Hallen's integral equation for 2D array of identical linear antennas
hallen4(L,a,d,V,M) hallen4.m - solve Hallen's integral equation for 2D array of non-identical linear antennas
hband(sigma,type)
heff(sa,sb) heff.m - aperture efficiency of horn antenna
hgain(N,A,B,sa,sb) hgain.m - horn antenna H-plane and E-plane gains
hopt(G,a,b,sa,sb,N) hopt.m - optimum horn antenna design
hsigma(r) hsigma.m - optimum sigma parametes for horn antenna
imped(L2,L1,d,b) imped.m - mutual impedance between two parallel standing-wave dipoles
impedmat(L,a,d) impedmat.m - mutual impedance matrix of array of parallel dipole antennas
king(L,a) king.m - King's 3-term sinusoidal approximation
kingeval(L,A,z) kingeval.m - evaluate King's 3-term sinusoidal current approximation
kingfit(L,I,z,terms) kingfit.m - fits a sampled current to King's 2-term sinusoidal approximation
lmatch(ZG,ZL,type) lmatch.m - L-section reactive conjugate matching network
lmin(ZL,Z0,type) lmin.m - find locations of voltage minima and maxima
mstripa(er,u) mstripa.m - microstrip analysis (calculates Z,eff from w/h)
mstripr(er,Z0,per) mstripr.m - microstrip synthesis with refinement (calculates w/h from Z)
mstrips(er,Z) mstrips.m - microstrip synthesis (calculates w/h from Z)
multibeam(d, w, A, ph0) multibeam.m - multi-beam array
multidiel(n,L,lambda,theta,po... multidiel.m - reflection response of isotropic or birefringent multilayer structure
multidiel1(n,L,lambda,theta,p... multidiel1.m - simplified version of multidiel for isotropic layers
multidiel2(n,l,f,theta,pol) multidiel2.m - reflection response of lossy isotropic multilayer dielectric structures
multiline(Z,L,ZL,f) multiline.m - reflection response of multi-segment transmission line
n2r(n) n2r.m - refractive indices to reflection coefficients of M-layer structure
nfcirc(F,Fmin,rn,gGopt) nfcirc.m - constant noise figure circle
nfig(Fmin, rn, gGopt, gG)
omniband(na,nH,nL,LH,LL,th,po... omniband.m - bandwidth of omnidirectional mirrors and Brewster polarizers
omniband2(na,nH,nL,LH,LL,th,p... omniband2.m - bandwidth of birefringent multilayer mirrors
onesect(ZL,Z0) onesect.m - one-section impedance transformer
p2c(mag,phase) p2c.m - phasor form to complex number
pi2t(Z123) pi2t.m - Pi to T transformation
pmatch(ZG,ZL,Z) pmatch.m - Pi-section reactive conjugate matching network
pockling(L,a,E,Nint,type) pockling.m - solve Pocklington's integral equation for linear antenna
poly2(z) poly2.m - specialized version of poly
quadr(a,b,N) quadr.m - Gauss-Legendre quadrature weights and evaluation points
quadrs(ab,N) quadrs.m - Gauss-Legendre quadrature weights and evaluation points on subintervals
qwt1(ZL,Z0,type) qwt1.m - quarter wavelength transformer with series segment
qwt2(ZL,Z0) qwt2.m - quarter wavelength transformer with 1/8-wavelength shunt stub
qwt3(ZL,Z0,Z2,type) qwt3.m - quarter wavelength transformer with shunt stub of adjustable length
r2n(r) r2n.m - reflection coefficients to refractive indices of M-layer structure
rhombic(L, alpha, Nth) rhombic.m - gain of traveling-wave rhombic antenna
scan(a, ps0) scan.m - scan array with given scanning phase
sector(d, ph1, ph2, N, Astop) sector.m - sector beam array design
sgain(S,g1,g2) sgain.m - transducer, available, and operating power gains of two-port
sgcirc(S,type,G) sgcirc.m - stability and gain circles
smat(sparam)
smatch(S) smatch.m - simultaneous conjugate match of a two-port
smith(n) smith.m - draw basic Smith chart
smithcir(c,r,maxG,width) smithcir.m - add stability and constant gain circles on Smith chart
snell(na,nb,tha,pol) snell.m - Calculates refraction angles from Snell's law for birefringent media
sparam(S) sparam.m - stability parameters of two-port
steer(d, a, ph0) steer.m - steer array towards given angle
stub1(zL,type) stub1.m - single-stub matching
stub2(zL,l,type) stub2.m - double-stub matching
stub3(zL,l1,l2,type,e) stub3.m - triple-stub matching
swr(Gamma) swr.m - standing wave ratio
t2pi(Zabc) t2pi.m - T to Pi transformation
taylor(d, ph0, N, R) taylor.m - Taylor-Kaiser window array weights
travel(L, Nth) travel.m - gain of traveling-wave antenna of length L
tsection(Z0,bl) tsection.m - T-section equivalent of a length-l transmission line segment
twosect(Z0,Z1,Z2,ZL) twosect.m - two-section impedance transformer
uniform(d, ph0, N) uniform.m - uniform array weights
ustep(t,tr) ustep.m - unit-step or rising unit-step function
vee(L, alpha, Nth) vee.m - gain of traveling-wave vee antenna
vprop(V2,I2,Z0,bl) vprop.m - voltage and current propagation
wavenum(er, mr, sigma, f) wavenum.m - calculate wavenumber and characteristic impedance
woodward(A, alt) woodward.m - Woodward-Lawson-Butler beams
y=d2r(x)
y=r2d(x)
y=upulse(t,td,tr,tf) upulse.m - generates trapezoidal, rectangular, triangular pulses, or a unit-step
yagi(L,a,d) yagi.m - simplified Yagi-Uda array design
z2g(Z,Z0) z2g.m - impedance to reflection coefficient transformation
zprop(Z2,Z0,bl) zprop.m - wave impedance propagation
RLCmovie.m
TDRmovie.m
contents.m
dipmovie.m
pulse2movie.m
pulsemovie.m
xtalkmovie.m
View all files

from Electromagnetic Waves & Antennas Toolbox by Sophocles Orfanidis
Companion Software

swr(Gamma)

% swr.m - standing wave ratio
%
% Usage: S = swr(Gamma)

% S. J. Orfanidis - 1999 - www.ece.rutgers.edu/~orfanidi/ewa

function S = swr(Gamma)

if nargin==0, help swr; return; end

if abs(Gamma)==1,
    S = inf;
else
    S = (1+abs(Gamma))./(1-abs(Gamma));
end

Highlights from Electromagnetic Waves & Antennas Toolbox

Highlights from
Electromagnetic Waves & Antennas Toolbox