Microstrip antenna theory and application

#Microstrip antenna theory and application Patch#

Either single or multiple feed lines are used to provide excitation to the antenna.

#Microstrip antenna theory and application Patch#

But patch antennas can also be formed with a collection of multiple patches on a dielectric substrate. Till now we have discussed a single patch etched on a substrate. As we have already discussed that patches can be formed in multiple shapes, however, due to easy fabrication rectangular, circular or square-shaped patches are generally used.

Here the substrate which is nothing but the dielectric material is used to separate the strip from the ground plane.Р”В«asically the patch or strip and the feed lines are photo-etched on the surface of the substrate. Also, excitation to the antenna is provided through feed lines connected to the patch.

Here we have shown the simplest form of patch antenna where the patch etched on the substrate is half-wavelength long while the thickness of the same is extremely less than РћВ». The figure here represents the top view of the microstrip antenna: This can be said in simple terms that a dielectric material having a conducting patch is supported by a ground plane. Suppose we have a rectangular patch antenna, which is formed by fabricating a rectangular metallic patch on a dielectric coated ground plane.

The patches can be rectangular, square, circular, triangular, annular or elliptical in shape. These antennas come in various shapes where its shape is defined by the shape of the metallic patch placed on the dielectric material. Generally, patch antennas are considered as low profile antennas and are used for microwave frequency applications having frequency greater than 100 MHz.