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Saturday, September 29, 2018

characteristic impedance



at every section of length transmission line, looking forward/backward, we see an impedance that is called characteristic impedance of a line .... for a lossless line (inductive and capacitive only):

Z0=jlw+11Z0+jcwjlw+Z01+jcwZ0=Z0j(lwZ20cw)lcw2z0=0 for a very short piece of T-line (length approaches zero), we can assume l×c0. In this case, equation (1) results in: Z0=lc Z0 is length independent and is called characteristic impedance of a transmission line.