Which two parameters are zero in the lossless line?

Explanation: Due to the minimal losses in the lossless transmission line, the parameters of conductance and attenuation constant are assumed to be zero.

What are the conditions for lossless transmission line?

Transmission Lines (4.20) A lossless line has these properties: (a) it does not dissipate any power, (b) it is non-dispersive (i.e., the phase constant varies linearly with frequency ω, or the velocity vp = ω/β is independent of frequency), and (c) its characteristic impedance Z0 is real.

What is R and G in transmission line?

To get an idea of the parameters, R’ would represent the d.c. resistance of one meter of the transmission line. The parameter G’ represents the isolation between the two conductors of the transmission line.

What is the value of γ for a lossless transmission medium?

Answer: a Explanation: For a lossless line, attenuation constant α is 0. Hence substituting α=0 in γ=α+jβ, we get γ= jβ.

What are the transmission line parameters how they changes with lossless and lossy transmission line?

When circuit elements R = G = 0, the transmission line becomes lossless. With series resistance and series inductance, the transmission line is lossy. Lossless and lossy transmission lines have different characteristics that are dependent upon the impedance in the transmission line.

Which of the following parameter is non zero for a lossless line?

Which of the following parameter is non zero for a lossless line? Explanation: The attenuation constant, resistance and conductance are zero for a lossless line. Only the phase constant is non zero.

What is the phase constant of lossless transmission line?

For a lossless transmission line attenuation constant is zero and the propagation occurs without losses. Explanation: The given propagation constant is in polar form .

What is wavelength of transmission line?

Wavelength is calculated by the formula λ=v/f, where “λ” is the wavelength, “v” is the propagation velocity, and “f” is the signal frequency. A rule-of-thumb for transmission line “shortness” is that the line must be at least 1/4 wavelength before it is considered “long.”

What is reflection in transmission line?

When a wave travels on a transmission line and finds an impedance mismatch, part (or all) of it is reflected back in the opposite direction. If the impedance of the line doesn’t match the impedance of the load, a reflection takes place and some of the power is reflected back.

Can reflection coefficient zero?

3 (MARCH 1986); P. 736-741, 9 FIGS. At certain angles of incidence, the amplitude of a plane compressional wave reflected from a plane inter- face separating two solids is zero. No particular attention has been paid to zero reflection coefficients, nor to the param- eter combinations that produce them.

When the reflection coefficient is zero then the standing wave ratio is?

The reflection will be zero. The standing wave ratio S = 1 – R/1 + R. For R = 0, the SWR is unity for matched line.

What is the difference between lossy and lossless transmission line?

A lossy transmission line consists of an appreciable value of series resistance and shunt conductance where different frequencies travel at different speeds. This is opposite to a lossless transmission line, where the speed of wave propagation is the same for all frequencies.

What is lossless line in transmission lines?

LOSSLESS TRANSMISSION LINES. A transmission line is said to be lossless if the conductors of line are perfect that is cnductivity σc=∞ and the dielectric medium between the lines is lossless that is conductivity σd=0. Condition for a line to be lossless. R=0=G. For loss less line, (a) Attenuation Constant α=0.

What is the leakage resistance of a lossless line?

As high line current flows through R producing losses R is made zero for a lossless line. As G is the shunt leakage conductance, there is a very small leakage current flowing to ground through G producing a very small loss. So G is also made zero ( or leakage resistance, Rg = 1/G , is made infinity) for a lossless .

How do you get a non-zero attenuation constant from a transmission line?

You get a non-zero attenuation constant if either G’ or R’ in the transmission line model (above) are non-zero terms (when G’ and R’ are zero the transmission line is lossless and α=0). The approximation of the attenuation constant under these conditions is calculated as:

What is the formula for a lossless line?

(4.19)γ = jβ = jω√LC. A lossless line has these properties: (a) it does not dissipate any power, (b) it is non-dispersive (i.e., the phase constant varies linearly with frequency ω, or the velocity vp = ω /β is independent of frequency), and (c) its characteristic impedance Z0 is real.