31. It had a characteristic impedance of 50 ?, and was adopted for use in the emerging broadcast industry. 32. This is directly analogous to the definition of characteristic impedance as the input impedance of an infinitely long line. 33. Given its a high frequency system where matching characteristic impedance is pretty vital this means the voltage has to split too. 34. An even faster transition into the stop-band and an even more constant characteristic impedance in the pass-band. 35. The characteristic impedance of a transmission line is the ratio of the voltage and current of a wave travelling along the line. 36. A wave is partly reflected when a transmission line is terminated with other than a pure resistance equal to its characteristic impedance . 37. A load that matches the characteristic impedance ( defined below ) will completely absorb the wave and the energy associated with it. 38. These two definitions are not exactly equivalent because the characteristic impedance at the receiver may be different from that at the source. 39. On the other hand, at high frequency in the MHz region, the characteristic impedance flattens out to something almost constant. 40. This is because the LAN data is in a higher frequency band where the characteristic impedance is substantially flat and mostly resistive.
