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 ?
The electrical characteristics that make up characteristic impedance.
Having derived all the primary parameters of the 3-phase power cable (Table I) its characteristic impedance and propagation constant were able to be obtained.
The characteristic impedance at each section of the proposed transition is kept at 50 [OMEGA] to have a wide bandwidth.
The theoretical transmission lines characteristic impedance is 638 D (C [approximately equal to] 5pF/m, L [approximately equal to] 213 1nH/m, [beta]/[omega] [approximately equal to] 3.4e-9) .
One of them calculates the strip width of the coplanar waveguide and the other calculates the sloth width of the coplanar waveguide having a desired characteristic impedance for a given dielectric substrate material.
where [Z.sub.910] is the characteristic impedance of TL9 and TL10 and [f.sub.4m-2] is the (4m - 2)th harmonic.
* The terminal branch impedance influences the position of peak and notches and the attenuation of notches significantly decrease with impedance larger or lower than characteristic impedance of power line.
Specifically, this factor uses the ratio of characteristic impedances for a non-complementary CPS ([W.sub.CPS] [not equal to] [S.sub.CPS]) to the characteristic impedance of self-complementary CPS ([W.sub.CPS] = [S.sub.CPS]), where [W.sub.CPS] is the metal width, [S.sub.CPS] is the strip spacing, and the impedance of CPS is given by [36].
The attenuation could also be reduced by a thicker line metallization or by increasing the line width and so decreasing the characteristic impedance.
This paper proposes a novel modified CRLH structure that has a continuous characteristic impedance distribution inside the passband, and sharp skirt characteristics in the upper or lower stopband whether the CRLH unit cell is right- or left-handed.
parameters are enhanced and become frequency dependent, we can expect that the characteristic impedance is also frequency-dependent.
Their topics include the analysis of nonhomogeneous helical systems using electrodynamical methods, calculating characteristic impedance of multiconductor lines, investigating slow-wave systems with versatile electromagnetic simulation and design tools, applying slow-wave structures to deflect electron beams, and the computer-aided design of electrodynamical delay lines.

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