 Here is the Python code that uses the PyAEDT library to create an antenna array in HFSS:

```python
import aedt
import json
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.cm as cm
import pyvista

# Set non-graphical mode
aedt.set_option('non_graphical', True)

# Download a 3D component
aedt.download_component('3D_Component_Path')

# Launch HFSS and save the project with a unique name
project = aedt.launch_hfss(project_name='Antenna_Array')

# Read the array definition from a JSON file
with open('array_definition.json') as f:
    array_def = json.load(f)

# Load a 3D component into the dictionary from a specified path
component_path = 'Component_Path'
component_dict = project.components.load_from_file(component_path)

# Set up a simulation and analyze it
simulation = project.simulations.add('Frequency Domain')
simulation.frequency_sweep.start = 1
simulation.frequency_sweep.stop = 10
simulation.frequency_sweep.points = 100
simulation.run()
simulation.analyze()

# Get far field data after the simulation completes
far_field = project.far_field.get()

# Generate a contour plot
freq = far_field.frequency
E_theta = far_field.E_theta
E_phi = far_field.E_phi
plt.contourf(freq, np.rad2deg(np.arctan2(E_phi, E_theta)), cm.viridis(E_theta.abs().T), extend='both')
plt.xlabel('Frequency (GHz)')
plt.ylabel('Azimuth (degrees)')
plt.title('Contour Plot')
plt.show()

# Generate 2D cutout plots
fig, axs = plt.subplots(2, 2)
for i, ax in enumerate(axs.flat):
    freq_slice = freq[i*25:(i+1)*25]
    E_theta_slice = E_theta[i*25:(i+1)*25]
    E_phi_slice = E_phi[i*25:(i+1)*25]
    ax.plot(freq_slice, E_theta_slice.real, label='Real')
    ax.plot(freq_slice, E_theta_slice.imag, label='Imaginary')
    ax.set_xlabel('Frequency (GHz)')
    ax.set_ylabel('E_theta')
    ax.legend()
plt.show()

# Generate 3D polar plots in Matplotlib
fig = plt.figure(figsize=(8, 6))
ax = fig.add_subplot(111, projection='polar')
ax.plot(np.rad2deg(np.arctan2(E_phi, E_theta)), far_field.frequency)
ax.set_ylabel('Frequency (GHz)')
ax.set_xlabel('Azimuth (degrees)')
plt.show()

# Generate 3D plots in PyVista
far_field_data = pyvista.arrays.StructuredGrid(dimensions=(len(freq), 2, 2), points=far_field.points, cells=far_field.cells)
far_field_data['E_theta'] = E_theta
far_field_data['E_phi'] = E_phi
plotter = pyvista.Plotter(shape=(8, 6))
plotter.add_mesh(far_field_data, scalar_range=(-1, 1), colormap='viridis')
plotter.show()

# Release AEDT at the end
project.close()
```

Please replace `'3D_Component_Path'` and `'Component_Path'` with the actual paths to the 3D component files. Also, the JSON file `array_definition.json` should contain the array definition in the following format:

```json
{
  "array_type": "linear",
  "elements": [
    {
      "position": [0, 0, 0],
      "component": "Dipole"
    },
    {
      "position": [1, 0, 0],
      "component": "Dipole"
    }
  ],
  "spacing": 0.5
}
```

This JSON file defines a linear array of two dipoles with a spacing of 0.5 units. You can modify this JSON file to define different array geometries as needed.