:class:`CircularPatch`
======================


.. py:class:: pyedb.libraries.rf_libraries.planar_antennas.CircularPatch(edb_cell=None, target_frequency: Union[str, float] = '2.4GHz', length_feeding_line: Union[str, float] = 0, layer: str = 'TOP_METAL', bottom_layer: str = 'BOT_METAL', add_port: bool = True)

   
   Circular microstrip patch antenna (optionally probe-fed).

   The class automatically determines the physical dimensions for a
   desired resonance frequency, creates the patch, ground plane and
   either an inset microstrip feed or a coaxial probe feed, and
   optionally sets up an HFSS simulation.

   :Parameters:

       **edb_cell** : :obj:`pyedb.Edb`, :obj:`optional`
           EDB project/cell in which the antenna will be built.

       **freq** : :class:`python:str` or :class:`python:float`, :obj:`default` "2.4GHz"
           Target resonance frequency of the patch.  A string such as
           ``"2.4GHz"`` or a numeric value in Hz can be given.

       **probe_offset** : :class:`python:str` or :class:`python:float`, :obj:`default` 0
           Radial offset of the 50 Ω coax probe from the patch center.
           A value of 0 places the probe at the center (not recommended
           for good matching).

       **layer** : :class:`python:str`, :obj:`default` "TOP_METAL"
           Metallization layer on which the patch polygon is drawn.

       **bottom_layer** : :class:`python:str`, :obj:`default` "BOT_METAL"
           Metallization layer on which the ground polygon is drawn.

       **add_port** : :ref:`bool <python:bltin-boolean-values>`, :obj:`default` :data:`python:True`
           If True, create a lumped port (probe feed) and add an HFSS
           setup with a frequency sweep.











   .. rubric:: Examples

   Build a 5.8 GHz circular patch on a 0.787 mm Rogers RO4350B substrate:

   >>> edb = pyedb.Edb()
   >>> patch = CircularPatch(edb_cell=edb, freq="5.8GHz", probe_offset="6.4mm", layer="TOP", bottom_layer="GND")
   >>> patch.substrate.er = 3.66
   >>> patch.substrate.tand = 0.0037
   >>> patch.substrate.h = 0.000787
   >>> patch.create()
   >>> edb.save_as("circ_patch_5p8GHz.aedb")

   Probe-fed 2.4 GHz patch with default 0 offset (center feed):

   >>> edb = pyedb.Edb()
   >>> CircularPatch(edb, freq=2.4e9).create()
   >>> edb.save_as("probe_circ_patch_2p4GHz.aedb")

   :Attributes:

       **substrate** : :obj:`Substrate`
           Substrate definition (``er``, ``tand``, ``h``) used for all
           analytical calculations.


   ..
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.. py:currentmodule:: CircularPatch

Overview
--------

.. tab-set::



   .. tab-item:: Methods

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

          * - :py:attr:`~create`
            - Draw the patch, ground plane and feed geometry in EDB.


   .. tab-item:: Properties

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

          * - :py:attr:`~estimated_frequency`
            - Improved analytical resonance frequency (Hz) of the dominant TM11 mode.
          * - :py:attr:`~radius`
            - Patch physical radius (m) derived for the target frequency.


   .. tab-item:: Attributes

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

          * - :py:attr:`~target_frequency`
            - 
          * - :py:attr:`~length_feeding_line`
            - 
          * - :py:attr:`~layer`
            - 
          * - :py:attr:`~bottom_layer`
            - 
          * - :py:attr:`~substrate`
            - 
          * - :py:attr:`~add_port`
            - 






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

.. code-block:: python

    from pyedb.libraries.rf_libraries.planar_antennas import CircularPatch

Property detail
---------------

.. py:property:: estimated_frequency
   :type: float


   
   Improved analytical resonance frequency (Hz) of the dominant TM11 mode.

   Uses Balanis’ closed-form model for single-layer circular patches.
   Accuracy ≈ ±0.5 % compared with full-wave solvers for
   0.003 ≤ h/λd ≤ 0.05 and εr 2–12.


   :Returns:

       :class:`python:float`
           Resonant frequency in Hz.













   ..
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.. py:property:: radius
   :type: float


   
   Patch physical radius (m) derived for the target frequency.
















   ..
       !! processed by numpydoc !!



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

.. py:attribute:: target_frequency

.. py:attribute:: length_feeding_line

.. py:attribute:: layer
   :value: 'TOP_METAL'


.. py:attribute:: bottom_layer
   :value: 'BOT_METAL'


.. py:attribute:: substrate

.. py:attribute:: add_port
   :value: True




Method detail
-------------

.. py:method:: create() -> bool

   
   Draw the patch, ground plane and feed geometry in EDB.



   :Returns:

       :ref:`bool <python:bltin-boolean-values>`
           True when the geometry has been successfully created.













   ..
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