`CircularPatch`#

class pyedb.libraries.rf_libraries.planar_antennas.CircularPatch(edb_cell=None, target_frequency: str | float = '2.4GHz', length_feeding_line: 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_cellpyedb.Edb, optional: EDB project/cell in which the antenna will be built.
freqstr or float, 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_offsetstr or float, 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).
layerstr, default “TOP_METAL”: Metallization layer on which the patch polygon is drawn.
bottom_layerstr, default “BOT_METAL”: Metallization layer on which the ground polygon is drawn.
add_portbool, default True: If True, create a lumped port (probe feed) and add an HFSS setup with a frequency sweep.

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:

substrateSubstrate: Substrate definition (er, tand, h) used for all analytical calculations.

Overview#

Methods

create

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

Properties

`estimated_frequency`	Improved analytical resonance frequency (Hz) of the dominant TM11 mode.
`radius`	Patch physical radius (m) derived for the target frequency.

Attributes

`target_frequency`
`length_feeding_line`
`layer`
`bottom_layer`
`substrate`
`add_port`

Import detail#

from pyedb.libraries.rf_libraries.planar_antennas import CircularPatch

Property detail#

property CircularPatch.estimated_frequency: 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:

float: Resonant frequency in Hz.

property CircularPatch.radius: float#: Patch physical radius (m) derived for the target frequency.

Attribute detail#

CircularPatch.target_frequency#

CircularPatch.length_feeding_line#

CircularPatch.layer = 'TOP_METAL'#

CircularPatch.bottom_layer = 'BOT_METAL'#

CircularPatch.substrate#

CircularPatch.add_port = True#

Method detail#

CircularPatch.create() → bool#