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  2. Reflection coefficient - Wikipedia

    en.wikipedia.org/wiki/Reflection_coefficient

    In telecommunications and transmission line theory, the reflection coefficient is the ratio of the complex amplitude of the reflected wave to that of the incident wave. The voltage and current at any point along a transmission line can always be resolved into forward and reflected traveling waves given a specified reference impedance Z 0.

  3. Standing wave ratio - Wikipedia

    en.wikipedia.org/wiki/Standing_wave_ratio

    — A web application that draws the Standing Wave Diagram and calculates the SWR, input impedance, reflection coefficient and more "Reflection and VSWR". fourier-series.com. RF concepts. — A flash demonstration of transmission line reflection and SWR "VSWR". telestrian.co.uk. — An online conversion tool between SWR, return loss and ...

  4. Scattering parameters - Wikipedia

    en.wikipedia.org/wiki/Scattering_parameters

    This is correct for reflection coefficients with a magnitude no greater than unity, which is usually the case. A reflection coefficient with a magnitude greater than unity, such as in a tunnel diode amplifier, will result in a negative value for this expression. VSWR, however, from its definition, is always positive.

  5. Reflections of signals on conducting lines - Wikipedia

    en.wikipedia.org/wiki/Reflections_of_signals_on...

    A time-domain reflectometer; an instrument used to locate the position of faults on lines from the time taken for a reflected wave to return from the discontinuity.. A signal travelling along an electrical transmission line will be partly, or wholly, reflected back in the opposite direction when the travelling signal encounters a discontinuity in the characteristic impedance of the line, or if ...

  6. Signal reflection - Wikipedia

    en.wikipedia.org/wiki/Signal_reflection

    In radio frequency (RF) practice this is often measured in a dimensionless ratio known as voltage standing wave ratio (VSWR) with a VSWR bridge. The ratio of energy bounced back depends on the impedance mismatch. Mathematically, it is defined using the reflection coefficient. [2]

  7. Slotted line - Wikipedia

    en.wikipedia.org/wiki/Slotted_line

    The impedance, Z, of the DUT can be calculated from the reflection coefficient by, = + where Z 0 is the characteristic impedance of the line. An alternative method is to plot the VSWR and distance to the node (in wavelengths) on a Smith chart. These quantities are directly measured by the slotted line.

  8. Transmission line - Wikipedia

    en.wikipedia.org/wiki/Transmission_line

    where is the propagation constant and = + is the voltage reflection coefficient measured at the load end of the transmission line. Alternatively, the above formula can be rearranged to express the input impedance in terms of the load impedance rather than the load voltage reflection coefficient:

  9. Impedance matching - Wikipedia

    en.wikipedia.org/wiki/Impedance_matching

    The voltage reflection coefficient and current reflection coefficient on the same side have opposite signs. Voltage reflection coefficients on opposite sides of the boundary have opposite signs. Because they are all the same except for sign it is traditional to interpret the reflection coefficient as the voltage reflection coefficient (unless ...