![]() ![]() I think the best approach is that advocated by rfcooltools which is to use discrete valued resistors to model the loss. There might be some other and better references on this topic. There is a minimal discussion of this atĪnd also the paper referred to in there (kurakowa), though this is a far simplified case than your scenario. I do not think you can use a regular smith chart for this purpose - you would have to create some sort of a special version of the smith chart which would have different characteristics than the standard smith chart (eg as you traverse a length of the transmission line, you cannot use a constant reflection coefficient circular contour - it would have a spiral like contour). And finally skin effect which is basically a resistor R=Rdc+Rse*sqrt(f/fo) where fo is the frequency where the skin effect starts effecting the resistance. The three dominant are dc resistance loss due to frequency dependent dielectric constant Er(f). To be even more accurate a lossy Tline has several lossy mechanisms. One way to approximate a lossy tline is to break it into smaller sections where you can approximate the loss by adding a resistor to an AC ground and or a series resistor often as your needs require. Post by on Oct 13 th, 2011, 5:30pmĪdding a complex component to the tline will not give you loss, for a single frequency you could look at it as a starting angle on a tline of a impedance |a+jb| arg(a+jb) or a tline of characteristic impedance in series with an inductor at a single frequency.īe careful using this over frequency its even less of what you are looking for, since complex numbers always have a frequency component tied to the complex number. have any one tried this? otherwise can any one give me suggesion how to start The problem is about smith chart for lossy transmission line, so i have started by assuming z0=a+ib, but some different curves i am getting. I was trying to solve a problem in RF design book in th lee. Post by raja.cedt on Oct 1 st, 2011, 7:48am Message started by raja.cedt on Oct 1 st, 2011, 7:48am 4, 896-899, 2008.The Designer's Guide Community Forum - Print Page The Designer's Guide Community Forum ![]() Liu, "An extended omnipotent Smith Chart with active parameters," Microwave and Optical Technology Letters, Vol. Liu, "Analysis of the omnipotent Smith Chart with imaginary characteristic impedances," ICMMT 2008 Proceedings, Nanjing, China, April 2014.ħ. Gonzalez Morales, "Complex analysis of the lossy-transmission line theory: A generalized Smith Chart," Turkish Journal of Electrical Engineering & Computer Sciences (Elektrik), Special issue on Electrical and Computer Engineering Education in the 21st Century Issues, Perspectives and Challenges, Turkey, Vol. H., "An improved transmission-line calculator," Electronics, Vol. H., "Transmission-line calculator," Electronics, Vol. Heredia-Juesas, "Complex analysis and parameterization of the lossy transmission line theory and its application to solve related physical problems," International Conference on Electromagnetics in Advanced Applications, ICEAA 2015 Proceedings, 141-144, Torino, Italia, September 7-11, 2015.ģ. GW-I, ``Electromagnetics & Signal Theory Notebooks" series. Gago-Ribas, E., Complex Transmission Line Analysis Handbook, Vol. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |