Standing wave ratio from reflection coefficient
===============================================

The standing wave ratio can be calculated by knowing the reflection coefficient of the
wave.

**Links:**

#. `Engineering LibreTexts <https://eng.libretexts.org/Bookshelves/Electrical_Engineering/Electro-Optics/Book%3A_Electromagnetics_I_(Ellingson)/03%3A_Transmission_Lines/3.14%3A_Standing_Wave_Ratio>`__.

..
    TODO: fix file name

.. py:currentmodule:: symplyphysics.laws.electricity.circuits.transmission_lines.coefficient_standing_wave_from_reflection_coefficient

.. py:data:: standing_wave_ratio

    :attr:`~symplyphysics.symbols.electrodynamics.standing_wave_ratio`.

Symbol:
    :code:`SWR`

Latex:
    :math:`\text{SWR}`

Dimension:
    :code:`dimensionless`


.. py:data:: reflection_coefficient

    :attr:`~symplyphysics.symbols.electrodynamics.reflection_coefficient`.

Symbol:
    :code:`Gamma`

Latex:
    :math:`\Gamma`

Dimension:
    :code:`dimensionless`


.. py:data:: law

    :code:`SWR = (1 + Abs(Gamma)) / (1 - Abs(Gamma))`


    Latex:
        .. math::
            \text{SWR} = \frac{1 + \left|{\Gamma}\right|}{1 - \left|{\Gamma}\right|}