diff --git a/matlab/examples/Rect_Waveguide.m b/matlab/examples/Rect_Waveguide.m
new file mode 100644
index 0000000..c2e8b5e
--- /dev/null
+++ b/matlab/examples/Rect_Waveguide.m
@@ -0,0 +1,108 @@
+close all;
+clear all;
+clc
+
+abs_length = 250;
+length = 4000;
+unit = 1e-3;
+a = 1000;
+width = a;
+b = 500;
+height = b;
+mesh_res = [10 10 20];
+
+%define mode
+m = 1;
+n = 0;
+
+EPS0 = 8.85418781762e-12;
+MUE0 = 1.256637062e-6;
+C0 = 1/sqrt(EPS0*MUE0);
+
+f0 = 1e9;
+
+k = 2*pi*f0/C0;
+kc = sqrt((m*pi/a/unit)^2 + (n*pi/b/unit)^2);
+fc = C0*kc;
+beta = sqrt(k^2 - kc^2);
+
+func_Ex = [num2str(n/b/unit) '*cos(' num2str(m*pi/a) '*x)*sin('  num2str(n*pi/b) '*y)'];
+func_Ey = [num2str(m/a/unit) '*sin(' num2str(m*pi/a) '*x)*cos('  num2str(n*pi/b) '*y)'];
+
+openEMS_Path = [pwd() '/../../']
+openEMS_opts = '';
+% openEMS_opts = [openEMS_opts ' --disable-dumps'];
+% openEMS_opts = [openEMS_opts ' --debug-material'];
+% openEMS_opts = [openEMS_opts ' --engine=multithreaded'];
+
+Sim_Path = 'tmp';
+Sim_CSX = 'rect_wg.xml';
+
+mkdir(Sim_Path);
+
+%setup FDTD parameter
+FDTD = InitFDTD(500,1e-6,'OverSampling',6);
+FDTD = SetSinusExcite(FDTD,f0);
+BC = [0 0 0 0 0 0];
+FDTD = SetBoundaryCond(FDTD,BC);
+
+%setup CSXCAD geometry
+CSX = InitCSX();
+mesh.x = 0 : mesh_res(1) : width;
+mesh.y = 0 : mesh_res(2) : height;
+mesh.z = -length: mesh_res(3) : length;
+CSX = DefineRectGrid(CSX, unit,mesh);
+
+
+%%%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)']);
+start=[0 0 length-abs_length];
+stop=[width height length];
+CSX = AddBox(CSX,'pml',0 ,start,stop);
+start=[0 0 -length+abs_length];
+stop=[width height -length];
+CSX = AddBox(CSX,'pml',0 ,start,stop);
+
+start=[0 0 0];
+stop=[width height 0];
+CSX = AddExcitation(CSX,'excite',0,[1 1 0]);
+weight{1} = func_Ex;
+weight{2} = func_Ey;
+weight{3} = 0;
+CSX = SetExcitationWeight(CSX,'excite',weight);
+CSX = AddBox(CSX,'excite',0 ,start,stop);
+ 
+%dump
+CSX = AddDump(CSX,'Et',0,0,1);
+start = [mesh.x(1) , height/2 , mesh.z(1)];
+stop = [mesh.x(end) , height/2 , mesh.z(end)];
+CSX = AddBox(CSX,'Et',0 , start,stop);
+
+CSX = AddDump(CSX,'Ht',1,0,1);
+CSX = AddBox(CSX,'Ht',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);
+
+% plotting
+PlotArgs.plane='zx';
+PlotArgs.pauseTime=0.1;
+PlotArgs.component=2;
+PlotArgs.zlim='auto';
+
+PlotHDF5FieldData('tmp/Et.h5',PlotArgs)
+