characteristic impedance


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characteristic impedance

[‚kar·ik·tə′ris·tik im′pēd·əns]
(communications)
The impedance that, when connected to the output terminals of a transmission line of any length, makes the line appear to be infinitely long, for there are then no standing waves on the line, and the ratio of voltage to current is the same for each point on the line. Also known as surge impedance.
References in periodicals archive ?
In the literature, the characteristic impedances of unshielded S&IM lines are calculated by using a formula depending on the effective permittivities of unshielded S&IM lines and characteristic impedance of a conventional microstrip line.
where [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] is the phase delay of line of characteristic impedance [Z.
The attenuation could also be reduced by a thicker line metallization or by increasing the line width and so decreasing the characteristic impedance.
The presence of one or other characteristic impedance depends on the type of simplification used in the deduction of each different model.
Using the classical definition of the characteristic impedance as the square root of the ratio between the impedance and the admittance:
Spectral-domain computation of characteristic impedance and multiport parameters of multiple coupled microstrip lines, IEEE Transactions on MTT 37(1): 215-221.
A transfer-matrix approach for estimating the characteristic impedance and wave numbers of limp and rigid porous materials.
When the characteristic impedances of the coupled line are 50 [ohm], the normalized even-mode characteristic impedance is the inverse of that of the odd-mode--[z.
The amount of reflection is a function of load impedance, RL, and the characteristic impedance, Zo, of the line.

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