InvertedFAntennaParams#
- class simpleEMS.ifa_antenna.InvertedFAntennaParams(resonant_freq: float, span_freq: float, via_diameter_mm: float = 0.6, *, substrate_eps_r: float, substrate_tand: float, substrate_thickness_mm: float, substrate_cells: int = 7, unit: float = 0.001, num_points: int = 1000, backend_engine: str = 'FDTD', simulation_box: ndarray[tuple[Any, ...], dtype[_ScalarT]] | None = None, FEM_num_solve_points: int = 10, FEM_max_solve_points: int | None = None, FEM_boundary: str = 'silver_muller', FEM_symmetry: tuple | None = None, FEM_fe_order: int = 1, FEM_air_pad_frac: float = 0.25, FEM_air_pad_mm: float | tuple | None = None, FEM_elems_per_wavelength: float = 16.0, FEM_mesh_freq: float | None = None, FEM_mesh_fine_scale: float = 1.0, FEM_min_layers: int = 3, FEM_port_type: str = 'lumpedport', FEM_port_mode_modes: int = 6, FEM_port_mode_index: int = 0, FEM_port_mode_zc: float | None = None, FEM_port_mode_eps_eff: float | None = None, FEM_waveport_width_mm: float | None = None, FEM_waveport_height_mm: float | None = None, FDTD_timestep: int = 90000000, FDTD_end_criteria: float = 0.0001, FDTD_mesh_resolution_factor: int = 10, FDTD_metal_mesh_resolution_factor: int = 40, copper_thickness_mm: float = 0.035, min_trace_width_mm: float = 0.1, min_trace_spacing_mm: float = 0.089, fp_precision: int = 3, charac_imp: float = 50)#
Bases:
SimParamsParameters for a printed inverted-F antenna (IFA).
Extends SimParams and computes the derived geometric parameters (radiating tip, shorting leg, and feed line dimensions) required to build and simulate a printed IFA.
- Parameters:
resonant_freq (float) – Target resonant frequency of the antenna in Hz.
span_freq (float) – Frequency span used to compute the simulation range around the resonant frequency in Hz.
via_diameter_mm (float, optional) – Finished outer diameter of the shorting via, in millimeters. Must fit inside the shorting leg’s overlap with the ground plane. Default 0.6.
- rad_tip_length_mm#
Length of the radiating tip (x-direction) in millimeters.
- Type:
float
- rad_tip_width_mm#
Width of the radiating tip (y-direction) in millimeters.
- Type:
float
- short_tip_length_mm#
Length of the shorting leg (y-direction) in millimeters.
- Type:
float
- short_tip_width_mm#
Width of the shorting leg (x-direction) in millimeters; equal to rad_tip_width_mm.
- Type:
float
- feed_spacing_factor#
Divisor applied to rad_tip_length_mm to derive feed_spacing_mm.
- Type:
int
- feed_spacing_mm#
Distance in x between the shorting leg and the feed arm, in millimeters.
- Type:
float
- feed_line_length_mm#
Length of the feed line, in millimeters; equal to short_tip_length_mm.
- Type:
float
- lambda_eff#
Free-space wavelength at resonant_freq, in meters.
- Type:
float
- rad_tip_total_length_mm#
Total arm length (shorting leg, corner, and radiating tip) in millimeters, set to a quarter wavelength at resonant_freq.
- Type:
float
- substrate_width_mm#
Substrate width including margin (lambda0 padding).
- Type:
float
- substrate_length_mm#
Substrate length including margin (lambda0 padding).
- Type:
float
Notes
short_tip_length_mm, rad_tip_width_mm, and feed_spacing_mm are fixed starting values; the feed spacing in particular sets the input match and is meant to be tuned.
As a subclass of SimParams, this class also accepts all of SimParams’s constructor arguments (e.g. substrate_eps_r, substrate_tand, substrate_thickness_mm, charac_imp); see that class’s docstring for details.
Attributes Summary
Bundle the flat
FEM_*fields into aFEMOptionsinstance.Compute the simulation frequency range.
Return the primary frequency of interest for post-processing.
Return
simulation_boxas per-axis[min, max]bounds.Return the substrate length including lambda0 padding.
Return the substrate width including lambda0 padding.
Attributes Documentation
- FDTD_end_criteria: float = 0.0001#
- FDTD_mesh_resolution_factor: int = 10#
- FDTD_metal_mesh_resolution_factor: int = 40#
- FDTD_timestep: int = 90000000#
- FEM_air_pad_frac: float = 0.25#
- FEM_air_pad_mm: float | tuple | None = None#
- FEM_boundary: str = 'silver_muller'#
- FEM_elems_per_wavelength: float = 16.0#
- FEM_fe_order: int = 1#
- FEM_max_solve_points: int | None = None#
- FEM_mesh_fine_scale: float = 1.0#
- FEM_mesh_freq: float | None = None#
- FEM_min_layers: int = 3#
- FEM_num_solve_points: int = 10#
- FEM_port_mode_eps_eff: float | None = None#
- FEM_port_mode_index: int = 0#
- FEM_port_mode_modes: int = 6#
- FEM_port_mode_zc: float | None = None#
- FEM_port_type: str = 'lumpedport'#
- FEM_symmetry: tuple | None = None#
- FEM_waveport_height_mm: float | None = None#
- FEM_waveport_width_mm: float | None = None#
- backend_engine: str = 'FDTD'#
- charac_imp: float = 50#
- copper_thickness_mm: float = 0.035#
- fem_options#
Bundle the flat
FEM_*fields into aFEMOptionsinstance.
- fp_precision: int = 3#
- freq_range#
Compute the simulation frequency range.
- Returns:
A tuple containing (f_min, f_max) calculated as (resonant_freq - span_freq, resonant_freq + span_freq).
- Return type:
tuple of (float, float)
- main_freq#
Return the primary frequency of interest for post-processing.
- Returns:
The resonant frequency of the antenna.
- Return type:
float
- min_trace_spacing_mm: float = 0.089#
- min_trace_width_mm: float = 0.1#
- num_points: int = 1000#
- simulation_bounds#
Return
simulation_boxas per-axis[min, max]bounds.A
(3,)box of sizes is centred on the origin.- Returns:
Array of shape (3, 2),
[[xmin, xmax], [ymin, ymax], [zmin, zmax]]in mm, orNonewhen no simulation box is defined.- Return type:
NDArray or None
- simulation_box: ndarray[tuple[Any, ...], dtype[_ScalarT]] | None = None#
- substrate_cells: int = 7#
- substrate_length_mm#
Return the substrate length including lambda0 padding.
- Returns:
Substrate length in mm.
- Return type:
float
- substrate_width_mm#
Return the substrate width including lambda0 padding.
- Returns:
Substrate width in mm.
- Return type:
float
- unit: float = 0.001#
- via_diameter_mm: float = 0.6#