An aperture antenna is characterized by the presence of a surface (aperture) on which the transformation of high-frequency energy, propagating through a transmission line, into the energy of free electromagnetic waves occurs. The dimensions of the aperture usually significantly exceed the wavelength at which the antenna operates. The antenna’s characteristics are determined by the field structure on the aperture, meaning they depend on its design. A typical representative of an aperture antenna is the parabolic reflector antenna.
Aperture antennas are widely used in radio and microwave communication systems, radar, satellite communication systems, radio and television broadcasting, as well as in other areas requiring the reception or transmission of electromagnetic signals.
They can have various shapes and designs, such as parabolic antennas, array antennas, open waveguides, and others.
Aperture antennas usually have a sharp radiation pattern and can provide a narrow beam for signal transmission or reception.
The advantages of aperture antennas include high efficiency, the ability to form narrow beams, high throughput, and the capability to operate at various frequencies. However, they can also be more complex to design and manufacture compared to other antenna types, and may require more precise tuning and installation.
Related sections:
Base antenna
GP-type antenna
Pistolkor dipole
Satellite frequency table