## Re: [Qucs-devel] Rectangular waveguide component

 Re: [Qucs-devel] Rectangular waveguide component From: andrea zonca - 2008-05-28 11:46:50 ```Thank you, Bastien, On Wed, May 28, 2008 at 1:39 PM, roucaries bastien wrote: > How do you deal with hight order mode? Do you suppose that your guide > is monomode? If your guide is monomode you need only to use an > equation for computing Z_0 (that is a complex quantity because your > are not lossless) and l_0 (electrical length). I will please to help > you but if you want to implement full model of rectangular wave guide, > you can not with qucs because it consider that it could exist only one > mode per component. I need only TE10 mode, it's enough, the problem is that I need to compute: * S parameters matrix * Y matrix for DC and for AC * N matrix for noise computation in AC simulations ```

 [Qucs-devel] Rectangular waveguide component From: andrea zonca - 2008-05-28 11:24:55 ```Dear QUCS developers, I'm working on improving the radiometer model already present in the qucs examples page, I need to develop a rectangular waveguide component model. The model should be able to work with QUCS DC and AC simulations with noise, transient is not necessary. The input parameters should be: * a, b: dimensions * L: length * sigma: resistivity of the material * epsilon: dielectric constant of the material I've started analyzing the transmission line component tline.cpp, the implementation is understandable, but I cannot find waveguide equations in the right formulation for using them in QUCS. Could you please provide some help? About connections of the rectangular waveguide with other components it is not a problem for my application because all the other components are represented as S-parameters files, and they actually represent devices with a waveguide interface. Next I'd like to build a rectangular waveguide component able to take into account a linear temperature gradient along its length. Cheers, Andrea Zonca Phd Student Physics Department Universita' degli Studi di Milano ```
 Re: [Qucs-devel] Rectangular waveguide component From: roucaries bastien - 2008-05-28 11:39:18 ```On Wed, May 28, 2008 at 1:24 PM, andrea zonca wrote: > Dear QUCS developers, > I'm working on improving the radiometer model already present in the > qucs examples page, > I need to develop a rectangular waveguide component model. > The model should be able to work with QUCS DC and AC simulations with > noise, transient is not necessary. > The input parameters should be: > * a, b: dimensions > * L: length > * sigma: resistivity of the material > * epsilon: dielectric constant of the material > I've started analyzing the transmission line component tline.cpp, the > implementation is understandable, but I cannot > find waveguide equations in the right formulation for using them in QUCS. > Could you please provide some help? How do you deal with hight order mode? Do you suppose that your guide is monomode? If your guide is monomode you need only to use an equation for computing Z_0 (that is a complex quantity because your are not lossless) and l_0 (electrical length). I will please to help you but if you want to implement full model of rectangular wave guide, you can not with qucs because it consider that it could exist only one mode per component. > About connections of the rectangular waveguide with other components > it is not a problem for my application because all the other > components > are represented as S-parameters files, and they actually represent > devices with a waveguide interface. > Next I'd like to build a rectangular waveguide component able to take > into account a linear temperature gradient along its length. Regards Bastien > Cheers, > > Andrea Zonca > Phd Student > Physics Department > Universita' degli Studi di Milano Phd student also :-) ```
 Re: [Qucs-devel] Rectangular waveguide component From: andrea zonca - 2008-05-28 11:46:50 ```Thank you, Bastien, On Wed, May 28, 2008 at 1:39 PM, roucaries bastien wrote: > How do you deal with hight order mode? Do you suppose that your guide > is monomode? If your guide is monomode you need only to use an > equation for computing Z_0 (that is a complex quantity because your > are not lossless) and l_0 (electrical length). I will please to help > you but if you want to implement full model of rectangular wave guide, > you can not with qucs because it consider that it could exist only one > mode per component. I need only TE10 mode, it's enough, the problem is that I need to compute: * S parameters matrix * Y matrix for DC and for AC * N matrix for noise computation in AC simulations ```