:class:`Substrate`
==================


.. py:class:: pyedb.libraries.common.Substrate

   
   Small helper that groups the four basic substrate parameters used
   throughout the library.


   :Parameters:

       **h** : :class:`python:float`, :obj:`default` 100 µm
           Substrate height in metres.

       **er** : :class:`python:float`, :obj:`default` 4.4
           Relative permittivity.

       **tan_d** : :class:`python:float`, :obj:`default` 0
           Loss tangent.

       **name** : :class:`python:str`, :obj:`default` "SUB"
           Logical name used for layer creation.

       **size** : :class:`python:tuple`\[:class:`python:float`, :class:`python:float`], :obj:`default` (1 :obj:`mm`, 1 :obj:`mm`)
           (width, length) of the surrounding ground plane in metres.











   .. rubric:: Examples

   >>> sub = Substrate(h=1.6e-3, er=4.4, tan_d=0.02, name="FR4", size=(10e-3, 15e-3))
   >>> sub.h
   0.0016



   ..
       !! processed by numpydoc !!


.. py:currentmodule:: Substrate

Overview
--------

.. tab-set::





   .. tab-item:: Attributes

      .. list-table::
          :header-rows: 0
          :widths: auto

          * - :py:attr:`~h`
            - 
          * - :py:attr:`~er`
            - 
          * - :py:attr:`~tan_d`
            - 
          * - :py:attr:`~name`
            - 
          * - :py:attr:`~size`
            - 






Import detail
-------------

.. code-block:: python

    from pyedb.libraries.common import Substrate


Attribute detail
----------------

.. py:attribute:: h
   :type:  float
   :value: 0.0001


.. py:attribute:: er
   :type:  float
   :value: 4.4


.. py:attribute:: tan_d
   :type:  float
   :value: 0


.. py:attribute:: name
   :type:  str
   :value: 'SUB'


.. py:attribute:: size
   :type:  Tuple[float, float]
   :value: (0.001, 0.001)