diff --git a/FDTD/operator_cylinder.cpp b/FDTD/operator_cylinder.cpp
index ff02934..8a0cb02 100644
--- a/FDTD/operator_cylinder.cpp
+++ b/FDTD/operator_cylinder.cpp
@@ -139,7 +139,7 @@ int Operator_Cylinder::CalcECOperator()
 			C+=inEC[0];
 			G+=inEC[1];
 		}
-		cerr << C << " and " << G << endl;
+//		cerr << C << " and " << G << endl;
 		vv_R0[pos[2]] = (1-dT*G/2/C)/(1+dT*G/2/C);
 		vi_R0[pos[2]] = (dT/C)/(1+dT*G/2/C);
 	}
diff --git a/matlab/examples/Circ_Waveguide_CylinderCoords.m b/matlab/examples/Circ_Waveguide_CylinderCoords.m
new file mode 100644
index 0000000..467520e
--- /dev/null
+++ b/matlab/examples/Circ_Waveguide_CylinderCoords.m
@@ -0,0 +1,121 @@
+close all;
+clear all;
+clc
+
+abs_length = 500;
+length = 5000;
+unit = 1e-3;
+rad  = 300;
+mesh_max = 15;
+N_alpha = ceil(rad * 2*pi / mesh_max);
+mesh_res = [mesh_max 2*pi/N_alpha mesh_max];
+
+
+EPS0 = 8.85418781762e-12;
+MUE0 = 1.256637062e-6;
+C0 = 1/sqrt(EPS0*MUE0);
+
+f0 = 400e6;
+
+p11 = 1.841;
+kc = p11 / rad /unit;
+k = 2*pi*f0/C0;
+fc = C0*kc/2/pi
+beta = sqrt(k^2 - kc^2);
+
+kc = kc*unit;
+func_Er = [ num2str(-1/kc^2) '/rho*cos(a)*j1('  num2str(kc) '*rho)'];
+func_Ea = [ num2str(1/kc) '*sin(a)*0.5*(j0('  num2str(kc) '*rho)-jn(2,'  num2str(kc) '*rho))'];
+
+openEMS_Path = [pwd() '/../../']
+openEMS_opts = '';
+% openEMS_opts = [openEMS_opts ' --disable-dumps'];
+% openEMS_opts = [openEMS_opts ' --debug-material'];
+% openEMS_opts = [openEMS_opts ' --debug-operator'];
+% openEMS_opts = [openEMS_opts ' --engine=multithreaded'];
+
+Sim_Path = 'tmp';
+Sim_CSX = 'Circ_WG_CC.xml';
+
+mkdir(Sim_Path);
+
+%setup FDTD parameter
+FDTD = InitCylindricalFDTD(1e5,1e-5,'OverSampling',10);
+T = 1/f0;
+FDTD = SetCustomExcite(FDTD,f0,[ '(1-exp(-1*(t/' num2str(T) ')^2) ) * sin(2*pi*' num2str(f0) '*t)' ]);
+BC = [0 0 0 0 0 0];
+FDTD = SetBoundaryCond(FDTD,BC);
+
+%setup CSXCAD geometry
+CSX = InitCSX();
+mesh.x = [0 2*mesh_res(1):mesh_res(1):rad];
+mesh.y = linspace(-pi,pi,N_alpha);
+mesh.z = 0 : mesh_res(3) : length;
+CSX = DefineRectGrid(CSX, 1e-3,mesh);
+
+start = [0 mesh.y(1) length-abs_length];
+stop = [rad mesh.y(end) length];
+
+%%fake pml
+finalKappa = 0.3/abs_length^4;
+finalSigma = finalKappa*MUE0/EPS0;
+CSX = AddMaterial(CSX,'pml');
+CSX = SetMaterialProperty(CSX,'pml','Kappa',finalKappa);
+CSX = SetMaterialProperty(CSX,'pml','Sigma',finalSigma);
+CSX = SetMaterialWeight(CSX,'pml','Kappa',['pow(abs(z)-' num2str(length-abs_length) ',4)']);
+CSX = SetMaterialWeight(CSX,'pml','Sigma',['pow(abs(z)-' num2str(length-abs_length) ',4)']);
+CSX = AddBox(CSX,'pml',0 ,start,stop);
+
+CSX = AddExcitation(CSX,'excite',0,[1 1 0]);
+weight{1} = func_Er;
+weight{2} = func_Ea;
+weight{3} = 0;
+CSX = SetExcitationWeight(CSX, 'excite', weight );
+start(3)=-5;
+stop(3)=5;
+CSX = AddBox(CSX,'excite', 5 ,start,stop);
+ 
+%dump
+CSX = AddDump(CSX,'Et','FileType',0,'DumpMode',0);
+start = [mesh.x(1) ,0 , mesh.z(1)];
+stop = [mesh.x(end) , 0 , mesh.z(end)];
+CSX = AddBox(CSX,'Et',0 , start,stop);
+
+CSX = AddDump(CSX,'Ht','DumpType',1,'FileType',0,'DumpMode',0);
+start = [mesh.x(1) ,0 , mesh.z(1)];
+stop = [mesh.x(end) , 0 , mesh.z(end)];
+CSX = AddBox(CSX,'Ht',0 , start,stop);
+
+%voltage calc
+CSX = AddProbe(CSX,'ut_exc',0);
+start = [ 0 0 0 ];stop = [ rad 0 0 ];
+CSX = AddBox(CSX,'ut_exc', 0 ,start,stop);
+
+CSX = AddProbe(CSX,'ut_1',0);
+start = [ 0 0 length/2 ];stop = [ rad 0 length/2 ];
+CSX = AddBox(CSX,'ut_1', 0 ,start,stop);
+
+%Write openEMS compatoble xml-file
+WriteOpenEMS([Sim_Path '/' Sim_CSX],FDTD,CSX);
+
+%cd to working dir and run openEMS
+savePath = pwd();
+cd(Sim_Path); %cd to working dir
+command = [openEMS_Path 'openEMS.sh ' Sim_CSX ' ' openEMS_opts];
+disp(command);
+system(command)
+cd(savePath);
+
+UI = ReadUI('ut_1','tmp/');
+plot(UI.TD{1}.t,UI.TD{1}.val);
+grid on;
+
+% plotting
+% if exist('tmp/Et.h5','file')
+%     PlotArgs.slice = {mesh.x(round(end/2)) mesh.y(round(end/2)) mesh.z(round(end/2))};
+%     PlotArgs.pauseTime=0.1;
+%     PlotArgs.component=0;
+%     PlotArgs.zlim='auto';
+% 
+%     PlotHDF5FieldData('tmp/Et.h5',PlotArgs)
+% end
\ No newline at end of file