RegisterCharacteristic impedanceCharacteristic impedance Z0 is an important parameter of the transmission line. If the transmission line is ended by the complex impedance Z0, all the energy is transmitted by the line and there is no reflection. If the ending impedance is different, a part of the energy is reflected back to the source. A standing wave is formed then over the transmission line. The characteristic impedance is equal to the ratio of the voltage over the current of the transit wave. In an ideal transmission line Z0 is real and there are no losses in the tranmission line. In a normal transmission line there is a small imaginary part. The value of the characteristic impedance depends on the radius, the shape and the dielectrical constant of the transmission line. Back
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